WO2007023749A1 - Deodorization apparatus and deodorization method - Google Patents

Deodorization apparatus and deodorization method Download PDF

Info

Publication number
WO2007023749A1
WO2007023749A1 PCT/JP2006/316267 JP2006316267W WO2007023749A1 WO 2007023749 A1 WO2007023749 A1 WO 2007023749A1 JP 2006316267 W JP2006316267 W JP 2006316267W WO 2007023749 A1 WO2007023749 A1 WO 2007023749A1
Authority
WO
WIPO (PCT)
Prior art keywords
packed bed
water
deodorizing
gas
packed
Prior art date
Application number
PCT/JP2006/316267
Other languages
French (fr)
Japanese (ja)
Inventor
Tsunetoshi Fujiwara
Original Assignee
Kanzaki Eisei Sisetu Kumiai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kanzaki Eisei Sisetu Kumiai filed Critical Kanzaki Eisei Sisetu Kumiai
Priority to JP2007532089A priority Critical patent/JPWO2007023749A1/en
Publication of WO2007023749A1 publication Critical patent/WO2007023749A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84—Biological processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to a deodorizing apparatus and a deodorizing method, and more specifically, water is sprayed into a packed bed filled with a packing that supports microorganisms, and odorous gas is circulated in the sprayed packed bed. It is related with the deodorizing apparatus and the deodorizing method which deodorize odor gas by making it. Furthermore, this invention relates to the manufacturing method of acidic water using the said deodorizing apparatus or the deodorizing method.
  • Biological deodorization apparatuses using microorganisms are used to remove odor components from various odor gases and deodorize them. For example, it is possible to effectively remove sulfur-rich compounds such as hydrogen sulfide from odorous gas generated from sewage treatment plants, human waste treatment plants, various factories, etc. Biological deodorization devices are also used for the purpose of deodorizing substances (see, for example, Patent Document 1).
  • the deodorization apparatus described in Patent Document 1 includes "a packed bed filled with a carrier for supporting microorganisms, a circulating water tank, and a watering facility for spraying circulating water into the packed bed, Biological deodorization characterized by comprising an odor gas supply port above the packed bed, a treatment gas discharge port below, and a pH adjusting means for controlling the pH of the circulating water in the range of 1 to 3 in the circulating water tank.
  • Apparatus "(Claim 3 in Patent Document 1) is disclosed.
  • Patent Document 1 also discloses a deodorization method.
  • This deodorization method is described as “a packed bed filled with a carrier for supporting microorganisms, wherein circulating water and an odor gas containing hydrogen sulfide are brought into contact with each other.
  • the biologically deodorizing treatment of odorous gas is characterized in that circulating water and odorous gas whose pH is controlled in the range of 1 to 3 flow down in parallel in the packed bed.
  • Deodorizing method “(Claim 1 in Patent Document 1) is disclosed.
  • Patent Document 1 These deodorizing apparatuses and deodorizing methods described in Patent Document 1 are described as follows: “In a packed bed filled with a carrier for supporting microorganisms, circulating water and odorous gas containing hydrogen sulfide are brought into contact with each other biologically. In the method of deodorizing odor gas, circulating water and odor gas whose pH is controlled in the range of 1 to 3 are allowed to flow down in the packed bed in parallel, and the excess sludge in the packed bed is discharged. By periodically performing contact with the packed bed and water containing chemicals, it is possible to maintain stable deodorization performance at low cost over a long period of time. (In the detailed description of the invention of Patent Document 1, paragraph number 0019).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-249232 (for example, paragraph numbers 0007 to 0019 and claims 1 to 4 in the detailed description of the invention)
  • an object of the present invention is to provide a deodorizing apparatus and a deodorizing method that do not require the packed bed cleaning step or need to perform the packed bed cleaning step less frequently! Means for solving the problem
  • the deodorizing apparatus of the present invention (hereinafter referred to as "the present apparatus") includes a packed bed filled with a microorganism-supported substance, and watering means for spraying water (watering) having a pH of 4 or less into the packed bed.
  • the deodorizing device deodorizes the odor gas by causing the water spray and the odor gas to circulate in the counterflow direction in the packed bed.
  • the present apparatus includes the following aspects (1) to (3).
  • the deodorizing apparatus further comprising a treatment tank having the following configuration: a path through which odor gas and water spray circulate, and a packed bed filled with a microorganism-supported material is disposed in the path.
  • a water receiving portion that receives water spray that has passed through the packed bed at a lower bottom of the packed bed, a supply port that introduces odorous gas into the path below the packed bed, and an odor above the packed bed It has a discharge port that discharges the gas.
  • the deodorizing apparatus according to any one of the above (this apparatus, including (1) and (2) above), wherein the first stage is the deodorizing apparatus.
  • the odor gas deodorized by the deodorizer is continuously supplied to the subsequent deodorizer, which is one or more of the following deodorizers, and deodorized, and the post-deodorizer is more than the pH of the sprinkling water in the previous deodorizer. Deodorizer with low water spray pH.
  • the deodorization method of the present invention (hereinafter referred to as “the present method”) comprises water (watering) of pHl. 4 or less and odorous gas in a countercurrent direction to each other in a packed bed filled with a microorganism support. It is a deodorizing method that deodorizes odorous gas by distributing it.
  • the present method includes the following aspects (4) and (5).
  • a deodorizing method for odor gas in which water and odor gas having pHl. 4 or less are circulated in a counter-current direction to two or more packed beds filled with microbial support, wherein The odorous gas that has passed through the preceding packed bed is continuously supplied to and passed through the subsequent packed bed, which is one or more of the subsequent packed beds.
  • a deodorizing method characterized by lowering the pH of water to be passed.
  • the present production method water having a pH of less than 4 and an odor gas containing a sulfur-based odor component are added to a packed bed filled with a microorganism support. Including a step of allowing the acidic water discharged from the packed bed to flow in a countercurrent direction with respect to each other. This is a method for producing acid water containing an acid.
  • this production method includes the following aspects (6) and (7).
  • the acidic water discharged from the packed bed is circulated in a counter-current direction with the odor gas containing the sulfur-based odor component again through the packed bed filled with the microbial support, and discharged from the packed bed.
  • the said manufacturing method including the process of collect
  • This manufacturing method provides the acidic water containing sulfuric acid obtained by this manufacturing method.
  • FIG. 1 is a system diagram showing a deodorizing apparatus (this apparatus) according to an embodiment of the present invention.
  • the apparatus comprises a packed bed filled with a microorganism-carrying substance, and water sprinkling means for spraying water (water spray) having a pH of 1.4 or less to the packed bed, and the water spray, odor gas, and the like are contained in the packed bed.
  • water spray water spray
  • the microorganism-carrying substance is a substance that carries a microorganism (for example, C. cerevisiae) that can be deodorized by biologically decomposing odor components (for example, hydrogen sulfide) contained in the odor gas. As long as it is anything, it is not limited at all.
  • a microorganism for example, C. cerevisiae
  • biologically decomposing odor components for example, hydrogen sulfide
  • water sprayed to the packed bed The pH of is preferably low (strongly acidic).
  • the pH of the water sprayed into the packed bed is too low (strongly acidic)
  • problems may arise when the activity of the microorganisms carried on the microorganism-supported material constituting the packed bed is reduced. Accordingly, it is preferable that the pH of the water sprayed in the packed bed satisfies both of these conditions.
  • the pH is preferably set to 1.4 or less (upper limit), more preferably 1 Less than 0, most preferably not more than 0.8, and (as a lower limit) preferably not less than 0.3, more preferably not more than 0.4.
  • the pH is usually preferably 0.3 to 1.4, more preferably 0.4 or more and less than 1.0, and most preferably 0.5 or more. Most preferably 0.5 to 0.8).
  • Patent Document 1 also states that “the surplus sludge accumulates in the packed bed, which gradually reduces the passage of odorous gas and water, and the flow of sprinkled water is reduced. In the end, flooding is likely to occur, making it difficult to ventilate odorous gas, preventing such flooding and extending the operation time until flooding.
  • various methods may be adopted to make the flow direction of the water spray and the flow direction of the odor gas in the packed bed counter-current (reverse direction), but there is no limitation.
  • the upper force of the packed bed is sprinkled to cause the inside of the packed bed to flow downward, and the odorous gas flows from the lower side of the packed bed to the upper side.
  • Force to supply pressurized odor gas or provide a means (for example, a blower, a fan, a compressor, etc.) for distributing the odor gas in the apparatus. Also good.
  • This apparatus may further include a processing tank having the following configurations (a) and (b) (hereinafter referred to as "processing tank main apparatus").
  • processing tank main apparatus A path through which odor gas and water spray circulate is provided, and a packed bed filled with a microorganism-supported substance is disposed in the path.
  • the odor gas and water spray circulate through the path formed inside the treatment tank, so that the water sprayed to the packed bed and the odor gas flowing through the packed bed are scattered. Or effectively dissipating.
  • the treatment tank has a supply port for introducing odor gas into the path below the packed bed and a discharge port for discharging the odor gas to the path force above the packed bed
  • the odor gas that has entered the treatment tank also flows into the treatment tank by moving upward in the packed bed, and the discharge rocker is also discharged.
  • the treatment tank since the treatment tank has a water receiving portion at the bottom of the packed bed, the packed bed can be collected by receiving water sprayed downward. As a result, the odor gas flows upward and the water spray flows downward in the packed bed, so that both flows in the packed bed can be made countercurrently.
  • the shape and size of the odor gas and water spray paths formed inside the treatment tank are such that the odor gas and water spray can be distributed to the desired extent and the packed bed can be arranged well.
  • Various types may be adopted as long as they are not limited, but may be columnar (for example, a cylinder, a prism, an elliptical column, etc.), for example.
  • the apparatus may have a circulation use means for circulating and using water received by the water receiving part of the treatment tank as water spray.
  • Sulfur-based odor components for example, hydrogen sulfide
  • Sulfur-based odor components for example, hydrogen sulfide
  • the water sprinkled with the water shows acidity by containing the generated sulfuric acid.
  • the water received in the water receiving part of the treatment tank is circulated as water spray.
  • the circulation means any water can be used as long as the water received by the water receiving section can be sprinkled, and there is no limitation.
  • a pump for pumping the water is a part of the water spray (including sulfuric acid and acidity) that has already been sprayed into the packed bed and contacted with the microbial support.
  • the deodorizing apparatus provided with two or more of the apparatuses, wherein the odor gas deodorized by the first-stage deodorizing apparatus that is the first deodorizing apparatus is continuously supplied to the subsequent second-stage deodorizing apparatus that is one or more deodorizing apparatuses.
  • series this device is deodorized Te
  • the pH of the water spray in front deodorizing apparatus may also be P H watering in subsequent deodorization apparatus is lowered (hereinafter, referred to as "series this device”.) o in other words, connected in series Two or more of these devices are connected to the front-stage deodorization device and the rear-stage deodorization device (following the front-stage deodorization device (on the downstream side). So that the odor gas deodorized by the former deodorizer is continuously deodorized by the latter deodorizer. To. At this time, the removal rate of sulfurous hydrogen can be improved by lowering the pH of the water spray in the latter-stage deodorizer rather than the pH of the water spray in the former-stage deodorizer.
  • the pH of the water spray in the pre-deodorizing device is to prevent or reduce the accumulation of excess sludge in the packed bed, and to maintain the activity of the microorganisms supported on the microorganism-supported material constituting the packed bed.
  • the pH is preferably (upper limit) preferably 1.4 or less, more preferably 1.2 or less, most preferably less than 1.0
  • (As the lower limit) is preferably 0.6 or more, more preferably 0.7 or more, and most preferably 0.75 or more (therefore, the pH is usually preferably 0.6 to 1. 4, more preferably from 0.7 to 1.2, and most preferably from 0.75 to less than 1.0;).
  • the pH of the water spray in the latter-stage deodorization device prevents or reduces the accumulation of excess sludge in the packed bed, and maintains the activity of the microorganisms supported on the microorganism-supported material constituting the packed bed.
  • the pH is preferably not more than 0.8 (as an upper limit), more preferably not more than 0.7, most preferably not more than 0.6, and (As a lower limit), preferably 0.3 or more, more preferably 0.4 or more, and most preferably 0.5 or more (therefore, the pH is usually preferably 0.3 to 0.8, more preferably 0.4 to 0.7, and most preferably 0.5 to 0.6;).
  • This method is a deodorizing method in which odorous gas is deodorized by causing water (watering) having a pH of 4 or less and odorous gas to flow through each other in a countercurrent direction through a packed bed filled with a microorganism support.
  • water water
  • odorous gas odorous gas
  • the pH of the water sprayed in the packed bed should be within a predetermined range, as is the case with the above-described apparatus, and the description thereof is omitted here.
  • the predetermined range of the pH of the water spray is the same as that of the above-described apparatus, the description thereof is omitted here.
  • the present method is a method for deodorizing odor gas in which water having a pH of 4 or less and odor gas are circulated in a countercurrent direction to two or more packed beds filled with a microorganism-supported substance, Odor gas that has passed through the first packed bed, which is the first packed bed, is continuously supplied to the subsequent packed bed, which is one or more of the subsequent packed beds, and then passed through the first packed bed.
  • Odor gas that has passed through the first packed bed which is the first packed bed
  • Odor gas that has passed through the subsequent packed bed which is the first packed bed
  • the subsequent packed bed which is one or more of the subsequent packed beds
  • the odor gas is deodorized by two or more packed beds that are continuously connected in series, and these two or more packed beds are followed by a front packed bed and a rear packed bed (following the upstream packed bed (direct downstream side)).
  • a plurality of odorous gases deodorized in the preceding packed bed are supplied so as to branch into a plurality of subsequent packed beds.
  • the odor gas deodorized by the front packed bed is continuously deodorized by the rear packed bed.
  • the pH of water (sprinkling) that passes through the front packed bed may be determined in the same manner as the pH of the sprinkled water in the preceding deodorizing device in the above-mentioned series main unit, and water that passes through the subsequent packed bed ( Since the pH of the water spray may be determined in the same manner as the pH of the water spray in the latter-stage deodorization device in the above-mentioned series main unit, detailed description thereof is omitted here.
  • the method may be one in which the water spray that has passed through the packed bed is sprayed again into the packed bed and used in circulation.
  • water having a pH of less than 4 and an odor gas containing a sulfur-based odor component are circulated in a countercurrent direction in a packed bed filled with a microbial support, and acidic water discharged from the packed bed is discharged. It is the manufacturing method of the acidic water containing a sulfuric acid including the process to collect
  • sulfur-based odor components for example, hydrogen sulfide
  • odor gas since sulfur-based odor components (for example, hydrogen sulfide) in odor gas are biodegraded by microorganisms supported on the microbial support of the packed bed, sulfuric acid is generated, and thus water is sprayed on the packed bed.
  • the water spray that has come into contact with the microorganism carrier contains the generated sulfuric acid (the water spray that has been sprayed into the packed bed and contacted with the microorganism carrier is more acidic than before the water sprayed into the packed bed.) O Therefore, the microorganisms supported on the microorganism-supported substance are made to flow through the packed bed filled with the microorganism-supported substance in a counter-current direction with water having an pH of less than 4 and odorous gas (including sulfur-based odor components). Acidic water containing sulfuric acid produced by biodegradation can be produced.
  • This manufacturing method can be implemented using the above-described apparatus.
  • Water flowing through the packed bed As the pH conditions, the conditions employed in the present apparatus and method described above can be similarly employed.
  • the acidic water recovered from the packed bed discharged from the packed bed
  • the odorous gas containing sulfur-based odor components in the packed bed filled with the microbial support It can also be implemented by circulating in the counterflow direction. In this way, the acidic water is circulated along with the odor gas through the packed bed filled with the microbial support multiple times, so that the amount of sulfuric acid in the acidic water is reduced by the microbiological decomposition of the sulfur-based odor components in the odor gas.
  • sulfuric acid can be concentrated in acidic water.
  • the acidic water produced by this production method contains sulfuric acid produced by biodegradation of the sulfur-based odor component (for example, hydrogen sulfide) in the odor gas by the microorganisms supported on the microbial support in the packed bed. It can be used as a source of sulfuric acid.
  • the sulfur-based odor component for example, hydrogen sulfide
  • FIG. 1 is a system diagram showing a deodorizing apparatus (present apparatus) 11 of the present invention. The device 11 will be described with reference to FIG.
  • This device 11 includes a first deodorizing device 21 that receives and deodorizes odor gas, and a second deodorizing device 41 that receives and deodorizes the odor gas deodorized by the first deodorizing device 21.
  • the first deodorizing device 21 includes a first deodorizing tower 23, a first packed bed 25 disposed in the first deodorized tower 23, and an upward force of the first packed bed 25 to the first packed bed 25.
  • the first sprinkler pipe 27 for sprinkling water, the first water receiving tank 29 provided below (lower bottom) of the first packed bed 25, and the first water tank 29 for measuring the pH of water in the first water receiving tank 29 A total of 31 and a first conduit 33 for transferring the water in the first water receiving tank 29 to the first sprinkler pipe 27, and a water in the first water receiving tank 29 via the first conduit 33 for the first sprinkler pipe
  • the first deodorization tower 23 has a substantially rectangular parallelepiped internal space, and a rectangular tower with one side of the rectangular parallelepiped substantially oriented in the vertical direction (bottomless cover. X 2 m square), and the first filling layer 25 is disposed in the internal space.
  • the first deodorization tower 23 has an inlet 23a for the odor gas 61 to the internal space and an odor gas from the internal space below and above the first packed bed 25 disposed in the internal space, respectively. It has an outlet 23b.
  • the lower part of the first deodorization tower 23 communicates with the upper part of the first water receiving tank 29.
  • the first packed layer 25 is formed by filling a microorganism-supported material (specifically, using a sponge carrier) on which microorganisms are supported.
  • the height of the first packed layer 25 is set. Is lm.
  • a first sprinkling pipe 27 is disposed above the first packed bed 25, and the water in the first water receiving tank 29 passes through the first conduit 33.
  • the upward force is also applied to the first packed bed 25 by being pumped by the first pump 35 to the first sprinkling pipe 27 (the first sprinkling pipe 27 is appropriately provided with a nozzle for ejecting water (not shown)). Watered.
  • the odor gas 61 enters the internal space of the first deodorization tower 23 from the inlet 23a (the odor gas 61 is sent by a blower (not shown) provided outside the apparatus 11).
  • the gas is supplied to the inlet 23a, that is, the odor gas 61 in the apparatus 11 is circulated by the pressure difference between the inlet 23a and the outlet 43b.
  • the odor gas 61 After passing through the first packed bed 25, it is discharged from the outlet 23b (goes to the second deodorizing device 41 described in detail later). That is, in the first packed bed 25, the odor gas 61 flows upward, and the water sprayed in the first packed bed 25 also flows downward (counterflow with each other).
  • the odor gas discharged from the outlet 23b also descends the duct portion 71 at the upper end force of the duct portion 71 and enters the second deodorizing device 41 from the lower end of the duct portion 71.
  • the second deodorizing device 41 includes a second deodorizing tower 43, a second packed layer 45 disposed inside the second deodorized tower 43, and the upward force of the second packed layer 45 to the second packed layer 45.
  • a second sprinkler pipe 47 for watering A second water receiving tank 49 provided under the second packed bed 45 (lower bottom), a second pH meter 51 for measuring the pH of water in the second water receiving tank 49, and a second water receiving tank 49
  • a second conduit 53 for transferring water to the second sprinkler pipe 47 and a second pump 55 for pumping water in the second water receiving tank 49 to the second sprinkler pipe 47 via the second conduit 53;
  • a second drain pipe 57 for draining the water in the second water receiving tank 49 and a second water pipe 59 for supplying water to the second water receiving tank 49 are provided.
  • the second deodorization tower 43 has a substantially rectangular parallelepiped internal space, and a rectangular tower with one side of the rectangular parallelepiped facing substantially in the vertical direction (bottomless cover. X 2m square), the lower part 43c communicates with the lower end of the duct part 71, and the upper part has an outlet 43b of odor gas (treated) 63. Further, the lower part 43 c of the second deodorization tower 43 communicates with the upper part of the second water receiving tank 49.
  • the second packed bed 45 is disposed in a space above the lower end of the duct portion 71 and below the outlet 43b.
  • the second packed layer 45 is formed by filling a microorganism-supported material (specifically, using a sponge carrier) on which microorganisms are supported.
  • the height of the second packed layer 45 is determined. Is lm.
  • a second sprinkling pipe 47 is disposed above the second packed bed 45, and the water in the second water receiving tank 49 passes through the second conduit 53.
  • the second pump 55 pumps the second sprinkling pipe 47 (the second sprinkling pipe 47 is appropriately provided with a nozzle for ejecting water (not shown)), thereby causing upward force to be applied to the second packed bed 45. Watered.
  • the water sprinkled from the second sprinkling pipe 47 to the second packed bed 45 flows down the surface of the microparticle carrier constituting the second packed bed 45, thereby passing through the second packed bed 45, and finally. Specifically, the lower end force of the second filling layer 45 is dropped and collected by the second water receiving tank 49.
  • the water thus passed through the second packed bed 45 and collected in the second water receiving tank 49 is again pumped to the second sprinkling pipe 47 by the second pump 55 via the second conduit 53. Used repeatedly.
  • the pH of the water in the second water receiving tank 49 is continuously measured by the second pH meter 51.
  • Odor gas that has entered the lower portion 43c of the second deodorization tower 43 also rises in the inner space of the second deodorization tower 43, passes through the second packed bed 45, and is discharged from the outlet 43b. Is done. That is, in the second packed bed 45, the odor gas flows upward, and the second sprinkling pipe 47 2 Water sprayed in the packed bed 45 flows downward (counterflow with each other).
  • the odor gas that has entered the internal space of the first deodorizing tower 23 from the inlet 23a is discharged from the outlet 23b after passing through the first packed bed 25, passes through the duct portion 71, and passes through the second deodorizing tower 4 After entering the internal space 3 and passing through the second packed bed 45, it is discharged from the outlet 43b.
  • the first packed bed 25 (the water sprinkled from the first sprinkling pipe 27 flows down) and the second packed bed 45 (the water sprinkled from the second sprinkling pipe 47 flows down) It is deodorized by the passage of odor gas.
  • sulfur-based odor components for example, hydrogen sulfide
  • PH of water water in the first receiving tank 29 and the second receiving tank 49
  • the first packed bed 25 is sprinkled through the first packed bed 25 and the second packed bed 45 by circulating water (water in the first received tank 29 and the second received tank 49) having a lowered pH.
  • the second filling layer 45 can be kept acidic.
  • the concentration of hydrogen sulfide contained in the odorous gas 61 was analyzed by a gas detector tube and found to be 200 ppm. In addition, when ammonia concentration contained in the odor gas 61 was prayed by a gas detector tube, it was 23 ppm.
  • This odorous gas 61 was pumped from the inlet 23a to the internal space of the first deodorizing tower 23 by a volumetric flow rate of 75m 3 (75000 liters) Z (the profile for pumping is not shown.) O
  • the temperature of the odorous gas 61 was about 25 ° C.
  • the hollow line speed in the second deodorizing tower 43 was 0.3 mZ seconds, and the hollow line speed in the second deodorizing tower 43 was 0.3 mZ seconds.
  • ⁇ meter 31 is in the range of 0.7 to 1.4, and if the lower limit is less than 0.7, the amount of water sprayed from the first sprinkler pipe 27 is set to 2501 (250 liters).
  • Increase to Z minutes and if the upper limit is exceeded 1.4, decrease the amount of water sprayed from the first sprinkling pipe 27 to 1501 (150 liters) Z minutes so that ⁇ is in the range of 0.7 to 1.4. I tried to fit.
  • the second pH meter 51 continues to be monitored within the range of 0.5 to 0.8. If the lower limit is less than 0.5, the amount of water sprayed from the second sprinkler tube 47 is set to 2501 (250 liters) Z.
  • (1) to (3) were performed in the same manner as in the comparative example (the hydrogen sulfide concentration and the ammonia concentration contained in the odor gas 61 were the same).
  • the PH will fall within the range of 1.6 to 2.0 by reducing the amount of water from the first sprinkler pipe 27 to 1501 (150 liters) Z. I did.
  • the second pH meter 51 continues to be monitored within the range of 1.0 to 1.6, and if the lower limit is less than 1.0, the amount of water sprayed from the second sprinkler tube 47 is 2501 (250 liters) Z min. Boost your power! When the upper limit of 1.6 is exceeded, the amount of water sprayed from the second sprinkler pipe 47 is reduced to 1501 (150 liters) Z so that the PH falls within the range of 1.0 to 1.6.
  • the deodorizing ability for example, the ability to remove hydrogen sulfide and ammonia
  • the packed layers the first packed layer 25 and the first packed layer 25 2 Surplus sludge accumulation in the packed bed 45
  • the packed layers the first packed layer 25 and the first packed layer 25 2 Surplus sludge accumulation in the packed bed 45
  • the deodorization apparatus (this apparatus 11) shown in the above-described embodiment includes a first deodorization apparatus 21, a second deodorization apparatus 41 that receives and deodorizes the odor gas deodorized by the first deodorization apparatus 21, and Is included.
  • the first deodorizing device 21 includes a first packed bed 25 that is a packed bed filled with a microbial support, and a pH of less than 4 (specifically, 0.7 to 1. 4) water sprinkling means for sprinkling the water sprinkling water (here, composed of the first water receiving tank 29, the first conduit 33, the first pump 35 and the first water sprinkling pipe 27).
  • the deodorizing apparatus deodorizes the odor gas 61 by circulating water (downward) and odor gas (upward) in the packed bed (first packed bed 25) in the counter-current direction.
  • sprinkling water and odor gas which are water of pHl. 4 or less, are directed to the packed bed (first packed bed 25) filled with the microorganism carrier.
  • a deodorizing method for deodorizing odorous gas is carried out by circulating in the flow direction.
  • the first deodorization device 21 further has a treatment tank (here, composed of a first deodorization tower 23 and a first water receiving tank 29) having the following configurations (a) and (b).
  • a treatment tank here, composed of a first deodorization tower 23 and a first water receiving tank 29
  • A) There is a passage (inner space of the first deodorization tower 23) through which odorous gas and water spray circulate, and a packed bed (first packed bed 25) filled with microbial support material is placed in the passage. It is installed.
  • B At the bottom of the packed bed (first packed bed 25), a first water receiving tank 29 serving as a water receiving section for receiving water spray that has passed through the packed bed (first packed bed 25), the packed bed (first packed bed (first packed bed 25)).
  • the first deodorizing device 21 is a circulating use means (in this case, the water received in the first water receiving tank 29, which is the water receiving part of the treatment tank (the first deodorizing tower 23 and the first water receiving tank 29)). It consists of a first conduit 33, a first pump 35, and a first sprinkler pipe 27). That is, here, the water spray that has passed through the packed bed (first packed bed 25) is sprinkled again into the packed bed (first packed bed 25) (as a sprayed water) for circulation.
  • the second deodorizing device 41 has a second packed bed 45 which is a packed bed filled with a microbial support, and a pH of 1.4 or less (specifically 0.5 to 0. 8) water sprinkling means for sprinkling the water sprinkling water (here, composed of the second water receiving tank 49, the second conduit 53, the second pump 55, and the second water sprinkling pipe 47),
  • the deodorizing apparatus deodorizes odorous gas by circulating water (downward) and odorous gas (upward) in the packed bed (second packed bed 45).
  • the water spray having a pH of 1.4 or less and the odor gas are allowed to flow in the countercurrent direction through the packed bed (second packed bed 45) filled with the microorganism carrier.
  • a deodorizing method for deodorizing odorous gas is performed.
  • the second deodorization device 41 further has a treatment tank (here, constituted by a second deodorization tower 43 and a second water receiving tank 49) having the following configurations (a) and (b).
  • a treatment tank here, constituted by a second deodorization tower 43 and a second water receiving tank 49
  • A) There is a passage (inner space of the second deodorization tower 43) through which odorous gas and water spray circulate, and a packed bed (second packed bed 45) filled with microbial support material is placed in the passage. It is established.
  • B At the bottom of the packed bed (second packed bed 45), a second water receiving tank 49 serving as a receiving section for receiving water spray that has passed through the packed bed (second packed bed 45), the packed bed (first packed bed (second packed bed 45)).
  • the second deodorization device 41 is a circulation use means for circulating and using the water received in the second water receiving tank 49 as the water receiving section of the treatment tank (the second deodorizing tower 43 and the second water receiving tank 49) (here, Second conduit 53, second pump 55, and second sprinkler pipe 47). That is, here, the water spray that has passed through the packed bed (second packed bed 45) is sprinkled again into the packed bed (second packed bed 45) (as water sprayed) and recycled.
  • This device 11 is a deodorizing device (here, provided with a first deodorizing device 21 and a second deodorizing device 41) having two or more of this device, and is a first-stage deodorizing device that is the first deodorizing device.
  • 1 Odor gas deodorized by the deodorizing device 21 is continuously supplied to the second deodorizing device 41, which is the subsequent deodorizing device 1 or more (here, 1) deodorizing device, deodorized, and before
  • the pH of the water spray in the latter-stage deodorizer (second deodorizer 41) is more specific than the pH of the water spray in the first-stage deodorizer (first deodorizer 21) (specifically 0.7 to 1.4). 0.5 to 0.8) is low.
  • the pH of the water spray in the first-stage deodorization apparatus is 0.7 to 1.4
  • the pH of the water spray in the second-stage deodorization apparatus is 0.5 to 0.
  • the force that seems to have an overlap range of 0.7 to 0.8 in both of these ranges is 0.7 to 1.4 or 0.5 to 0.8. If both pH values are compared at the same time, the pH of the water spray in the latter deodorizer (second deodorizer 41) is lower than the pH of the water spray in the former deodorizer (first deodorizer 21). .
  • the force 1 device is used, and 3 or more (3, 4, 5, It goes without saying that this device may be provided.
  • water and odor gas having pHl. 4 or less are counter-currently flowed in two or more packed beds (here, the first packed bed 25 and the second packed bed 45) filled with microbial support.
  • This is a method for deodorizing odor gas to be circulated in, and is a packed bed of 1 or more (here, 1) following the odor gas that has passed through the preceding packed bed (first packed bed 25), which is the packed bed of 1.
  • first packed bed 25 which is the packed bed of 1.
  • second packed bed 45 Continuously feed and pass through the subsequent packed bed (second packed bed 45) and the previous packed bed (first packed bed 25)
  • the pH (0.5 to 0.8) of the water passed through the latter packed bed (second packed bed 45) is made lower than the pH (0.7 to 1.4) of the water passed through the tank.
  • water having a pH of less than 4 and odorous gas containing sulfur-based odorous components are passed in a countercurrent direction to the packed bed (first packed bed 25) filled with the microorganism carrier.
  • the acidic water discharged from the packed bed (first packed bed 25) is collected (for example, the discharged liquid of the first pump 35 and the drainage from the first drain pipe 37 may be collected).
  • a process for producing acidic water containing sulfuric acid is being carried out.
  • the acidic water discharged from the packed bed (first packed bed 25) is returned to the packed bed (first packed bed 25) filled with microbial support again.
  • the method includes a step of circulating the odor gas containing the system odor component in a counter-current direction and recovering the acidic water discharged from the packed bed (first packed bed 25).
  • This method of producing acidic water containing sulfuric acid is performed using the first deodorizing device 21.
  • the water spray (acid water containing sulfuric acid) in the first deodorizing device 21 produced by the method for producing acidic water containing sulfuric acid (this production method) can be used as an aqueous solution of sulfuric acid (a source of sulfuric acid).
  • water having a pH of less than 4 and odorous gas containing sulfur-based odorous components are counter-flowed to each other in the packed bed (second packed layer 45) filled with the microbial support.
  • the acid water discharged from the packed bed (second packed bed 45) is collected (for example, the discharged liquid of the second pump 55 and the drainage from the second drain pipe 57 may be collected).
  • a process for producing acidic water containing sulfuric acid is being carried out, including the step of: Then, in the method for producing acidic water containing sulfuric acid, the acidic water discharged from the packed bed (second packed bed 45) is re-filled with the packed bed (second packed bed 45) filled with the microorganism carrier.
  • This method for producing acid water containing sulfuric acid is performed using the second deodorization apparatus 41.
  • the water spray (acid water containing sulfuric acid) in the second deodorizer 41 produced by the method for producing acidic water containing sulfuric acid (this production method) can be used as an aqueous solution of sulfuric acid (a source of sulfuric acid).

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

It is intended to provide a deodorization apparatus wherein the step of washing a packing layer is unnecessary or the packing layer may be washed only at a low frequency. A deodorization apparatus having a packing layer packed with a material carrying a microorganism and a watering means of spraying water having a pH value of 1.4 or lower (a spray water) to the packing layer, wherein the spray water and an odorous gas countercurrently pass to each other in the packing column so that the odorous gas is deodorized. This apparatus may be further provided with a treating tank having the following constitution. Namely, a treating tank wherein a pathway through which an odorous gas and a spray water pass is formed, a packing column packed with a material carrying a microorganism is formed in the pathway, a water receiver part for receiving the spray water having passed through the packing layer is located at the bottom below the packing layer, a feeding port for feeding the odorous gas into the pathway is located below the packing layer, and a discharge port for discharging the odorous gas from the pathway is located above the packing column.

Description

明 細 書  Specification
脱臭装置及び脱臭方法  Deodorizing device and deodorizing method
技術分野  Technical field
[0001] 本発明は、脱臭装置及び脱臭方法に関し、より詳細には、微生物を担持する充填 物が充填された充填層に散水を行 、、その散水された充填層中に臭気ガスを流通さ せることで臭気ガスを脱臭する脱臭装置及び脱臭方法に関する。さらに本発明は、 上記脱臭装置又は脱臭方法を利用した酸性水の製造方法に関する。  TECHNICAL FIELD [0001] The present invention relates to a deodorizing apparatus and a deodorizing method, and more specifically, water is sprayed into a packed bed filled with a packing that supports microorganisms, and odorous gas is circulated in the sprayed packed bed. It is related with the deodorizing apparatus and the deodorizing method which deodorize odor gas by making it. Furthermore, this invention relates to the manufacturing method of acidic water using the said deodorizing apparatus or the deodorizing method.
背景技術  Background art
[0002] 微生物を用いた生物学的な脱臭装置は、様々な臭気ガスから臭気成分を除去し脱 臭するために用いられている。例えば、下水処理場、し尿処理場、各種工場等から 発生する臭気ガスから、硫ィヒ水素に代表される硫黄ィヒ合物を効果的に除去すること ができることから、力かる硫黄ィ匕合物を除去する脱臭目的にも生物学的脱臭装置は 用いられている（例えば、特許文献 1参照)。  [0002] Biological deodorization apparatuses using microorganisms are used to remove odor components from various odor gases and deodorize them. For example, it is possible to effectively remove sulfur-rich compounds such as hydrogen sulfide from odorous gas generated from sewage treatment plants, human waste treatment plants, various factories, etc. Biological deodorization devices are also used for the purpose of deodorizing substances (see, for example, Patent Document 1).
[0003] 特許文献 1に記載の脱臭装置は、「微生物を担持するための担体を充填した充填 層と、循環水槽と、循環水を充填層に散水するための散水設備とを有し、前記充填 層の上方に臭気ガス供給口及び下方に処理ガス排出口と、前記循環水槽に、循環 水の pHを 1〜3の範囲に制御する pH調製手段とを備えたことを特徴とする生物脱臭 装置。」（特許文献 1中の請求項 3)が開示されている。  [0003] The deodorization apparatus described in Patent Document 1 includes "a packed bed filled with a carrier for supporting microorganisms, a circulating water tank, and a watering facility for spraying circulating water into the packed bed, Biological deodorization characterized by comprising an odor gas supply port above the packed bed, a treatment gas discharge port below, and a pH adjusting means for controlling the pH of the circulating water in the range of 1 to 3 in the circulating water tank. Apparatus "(Claim 3 in Patent Document 1) is disclosed.
また、同様に、特許文献 1には脱臭方法も開示されており、該脱臭方法は「微生物 を担持するための担体を充填した充填層で、循環水と硫化水素を含む臭気ガスとを 接触させて、生物学的に臭気ガスを脱臭処理する方法において、前記充填層内を、 pHが 1〜3の範囲に制御された循環水と臭気ガスとを並行して流下させることを特徴 とする生物脱臭方法。」（特許文献 1中の請求項 1)が開示されている。  Similarly, Patent Document 1 also discloses a deodorization method. This deodorization method is described as “a packed bed filled with a carrier for supporting microorganisms, wherein circulating water and an odor gas containing hydrogen sulfide are brought into contact with each other. The biologically deodorizing treatment of odorous gas is characterized in that circulating water and odorous gas whose pH is controlled in the range of 1 to 3 flow down in parallel in the packed bed. Deodorizing method "(Claim 1 in Patent Document 1) is disclosed.
これら特許文献 1に記載の脱臭装置及び脱臭方法は、「微生物を担持するための 担体を充填した充填層で、循環水と硫ィ匕水素を含む臭気ガスとを接触させて、生物 学的に臭気ガスを脱臭処理する方法において、 pHが 1〜3の範囲に制御された循 環水と臭気ガスを該充填層内を並行して流下させ、また、充填層の余剰汚泥の排出 を、充填層と薬品を含む水とを接触させて定期的に行うことで、低コストで長期間に わたって安定した脱臭性能を維持することが可能となる。」（特許文献 1の発明の詳細 な説明中、段落番号 0019)という効果を奏する。 These deodorizing apparatuses and deodorizing methods described in Patent Document 1 are described as follows: “In a packed bed filled with a carrier for supporting microorganisms, circulating water and odorous gas containing hydrogen sulfide are brought into contact with each other biologically. In the method of deodorizing odor gas, circulating water and odor gas whose pH is controlled in the range of 1 to 3 are allowed to flow down in the packed bed in parallel, and the excess sludge in the packed bed is discharged. By periodically performing contact with the packed bed and water containing chemicals, it is possible to maintain stable deodorization performance at low cost over a long period of time. (In the detailed description of the invention of Patent Document 1, paragraph number 0019).
[0004] 特許文献 1 :特開 2004— 249232号公報 (例えば、発明の詳細な説明中の段落番 号 0007〜0019、請求項 1〜4等） Patent Document 1: Japanese Patent Application Laid-Open No. 2004-249232 (for example, paragraph numbers 0007 to 0019 and claims 1 to 4 in the detailed description of the invention)
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0005] し力しながら、特許文献 1に記載の脱臭装置及び脱臭方法にぉ 、ては、充填層内 における汚泥の発生量が多いことから充填層内に余剰汚泥が蓄積することによって 、臭気ガス及び水 (被散水）の通過面積が徐々に狭くなり、散水された水の流下が減 少し、ついにはフラッデイングを生じて、臭気ガスの通気が不可能となる問題を生じる 。この問題を回避するために、特許文献 1に記載の脱臭装置及び脱臭方法において は、「充填層の余剰汚泥の排出を、充填層と薬品を含む水とを接触させて定期的に 行うこと」（以下、「充填層洗浄工程」という。 ) (例えば、特許文献 1の発明の詳細な説 明中、段落番号 0019。請求項 2等を参照されたい。）を要するものである。かかる充 填層洗浄工程は、薬品を用いることから費用が力さんだり、手間が力かることや、さら にはダウンタイム (臭気ガスの脱臭を行うことができない時間）を生じうること等から問 題があった。 [0005] However, with the deodorizing apparatus and the deodorizing method described in Patent Document 1, since the amount of sludge generated in the packed bed is large, excess sludge accumulates in the packed bed. The passage area of gas and water (sprayed water) gradually decreases, the flow of sprinkled water decreases, and eventually flooding occurs, causing a problem that odor gas cannot be vented. In order to avoid this problem, in the deodorizing apparatus and deodorizing method described in Patent Document 1, “excess sludge in the packed bed is discharged periodically by bringing the packed bed into contact with water containing chemicals”. (Hereinafter referred to as “packed bed cleaning step”.) (For example, in the detailed description of the invention of Patent Document 1, paragraph number 0019. Refer to claim 2 etc.). Such a packed bed cleaning process is costly due to the use of chemicals, is labor intensive, and may cause downtime (time during which odor gas cannot be deodorized). There was a title.
そこで、本発明においては、充填層洗浄工程を行う必要がないか又は必要な充填 層洗浄工程の頻度が小さ!/ヽ脱臭装置及び脱臭方法を提供することを目的とする。 課題を解決するための手段  Accordingly, an object of the present invention is to provide a deodorizing apparatus and a deodorizing method that do not require the packed bed cleaning step or need to perform the packed bed cleaning step less frequently! Means for solving the problem
[0006] 本発明の脱臭装置 (以下、「本装置」という。）は、微生物担持物が充填された充填 層と、該充填層に pHl. 4以下の水 (散水)を散水する散水手段と、を備えてなり、該 充填層内に散水と臭気ガスとを互いに向流方向で流通させることで、臭気ガスを脱 臭する脱臭装置である。  [0006] The deodorizing apparatus of the present invention (hereinafter referred to as "the present apparatus") includes a packed bed filled with a microorganism-supported substance, and watering means for spraying water (watering) having a pH of 4 or less into the packed bed. The deodorizing device deodorizes the odor gas by causing the water spray and the odor gas to circulate in the counterflow direction in the packed bed.
[0007] また、本装置には、以下の（1)〜（3)の態様が含まれる。  [0007] The present apparatus includes the following aspects (1) to (3).
(1)さらに下記の構成を有する処理槽を有する、上記脱臭装置：内部に臭気ガス及 び散水が流通する経路を有し、該経路に微生物担持物が充填された充填層が配設 されている、該充填層の下方底部に該充填層を通過した散水を受ける受水部、該充 填層の下方に臭気ガスを該経路に導入する供給口、及び該充填層の上方に臭気ガ スを該経路力 排出する排出口を有する。 (1) The deodorizing apparatus further comprising a treatment tank having the following configuration: a path through which odor gas and water spray circulate, and a packed bed filled with a microorganism-supported material is disposed in the path. A water receiving portion that receives water spray that has passed through the packed bed at a lower bottom of the packed bed, a supply port that introduces odorous gas into the path below the packed bed, and an odor above the packed bed It has a discharge port that discharges the gas.
(2)処理槽の受水部に受けられた水を散水として循環使用する循環使用手段を有 するものである、上記（1)に記載の脱臭装置。  (2) The deodorization apparatus according to (1) above, having a circulation use means for circulating and using water received in the water receiving part of the treatment tank as water spray.
(3)上記のいずれか 1に記載の脱臭装置 (本装置。なお、上記（1)と（2)とを含む。 ) を 2以上備えた脱臭装置であって、 1の脱臭装置である前段脱臭装置で脱臭処理さ れた臭気ガスが、後続する 1以上の脱臭装置である後段脱臭装置に連続的に供給さ れて脱臭処理され、かつ前段脱臭装置における散水の pHよりも、後段脱臭装置に おける散水の pHが低いものである、脱臭装置。  (3) The deodorizing apparatus according to any one of the above (this apparatus, including (1) and (2) above), wherein the first stage is the deodorizing apparatus. The odor gas deodorized by the deodorizer is continuously supplied to the subsequent deodorizer, which is one or more of the following deodorizers, and deodorized, and the post-deodorizer is more than the pH of the sprinkling water in the previous deodorizer. Deodorizer with low water spray pH.
[0008] 本発明の脱臭方法 (以下、「本方法」という。）は、微生物担持物が充填された充填 層に、 pHl. 4以下の水（散水）と臭気ガスとを互いに向流方向で流通させることで、 臭気ガスを脱臭する脱臭方法である。  [0008] The deodorization method of the present invention (hereinafter referred to as "the present method") comprises water (watering) of pHl. 4 or less and odorous gas in a countercurrent direction to each other in a packed bed filled with a microorganism support. It is a deodorizing method that deodorizes odorous gas by distributing it.
[0009] また、本方法には、以下の（4)及び（5)の態様が含まれる。  [0009] The present method includes the following aspects (4) and (5).
(4)微生物担持物が充填された 2以上の充填層に、 pHl. 4以下の水と臭気ガスとを 互いに向流方向で流通させる臭気ガスの脱臭方法であって、 1の充填層である前段 充填層を通過させた臭気ガスを、後続する 1以上の充填層である後段充填層に連続 的に供給して通過させ、かつ前段充填層に通過させる水の pHよりも、後段充填層に 通過させる水の pHを低くすることを特徴とする、脱臭方法。  (4) A deodorizing method for odor gas in which water and odor gas having pHl. 4 or less are circulated in a counter-current direction to two or more packed beds filled with microbial support, wherein The odorous gas that has passed through the preceding packed bed is continuously supplied to and passed through the subsequent packed bed, which is one or more of the subsequent packed beds. A deodorizing method characterized by lowering the pH of water to be passed.
(5)充填層を通過した散水を再び充填層に散水して循環使用するものである、上記 脱臭方法。  (5) The above deodorizing method, wherein the water spray that has passed through the packed bed is sprayed again into the packed bed and circulated.
[0010] 前述した本装置 (脱臭装置)又は本方法 (脱臭方法）にお!、て、臭気ガスとして硫黄 系臭気成分を含むガスを用いた場合、副産物として硫酸を含む酸性水が生成される 。このため本発明は、脱臭装置又は脱臭方法を利用した硫酸を含む酸性水の製造 方法に関する。  [0010] In the above-described apparatus (deodorization apparatus) or method (deodorization method), when a gas containing a sulfur-based odor component is used as the odor gas, acidic water containing sulfuric acid is produced as a by-product. . For this reason, this invention relates to the manufacturing method of the acidic water containing a sulfuric acid using a deodorizing apparatus or the deodorizing method.
即ち、本発明の酸性水の製造方法 (以下、「本製法」という。）は、微生物担持物が 充填された充填層に、 pHl. 4以下の水と硫黄系臭気成分を含む臭気ガスとを互い に向流方向で流通させ、該充填層から排出された酸性水を回収する工程を含む、硫 酸を含む酸性水の製造方法である。 That is, in the method for producing acidic water of the present invention (hereinafter referred to as “the present production method”), water having a pH of less than 4 and an odor gas containing a sulfur-based odor component are added to a packed bed filled with a microorganism support. Including a step of allowing the acidic water discharged from the packed bed to flow in a countercurrent direction with respect to each other. This is a method for producing acid water containing an acid.
また、本製法には、以下の（6)及び (7)の態様が含まれる。  In addition, this production method includes the following aspects (6) and (7).
(6)前記充填層から排出された酸性水を、再び微生物担持物が充填された充填層 に硫黄系臭気成分を含む臭気ガスと互いに向流方向で流通させ、該充填層から排 出された酸性水を回収する工程を含む、上記製造方法。  (6) The acidic water discharged from the packed bed is circulated in a counter-current direction with the odor gas containing the sulfur-based odor component again through the packed bed filled with the microbial support, and discharged from the packed bed. The said manufacturing method including the process of collect | recovering acidic water.
(7)前記工程を本装置 (上記（1)〜（3)の態様を含む。）を用いて行う、上記製造方 法。  (7) The said manufacturing method which performs the said process using this apparatus (The aspect of said (1)-(3) is included.).
本製法は、本製法によって得られた、硫酸を含む酸性水を提供する。  This manufacturing method provides the acidic water containing sulfuric acid obtained by this manufacturing method.
図面の簡単な説明 Brief Description of Drawings
[図 1]一実施形態の本発明の脱臭装置 (本装置)を示す系統図である。 FIG. 1 is a system diagram showing a deodorizing apparatus (this apparatus) according to an embodiment of the present invention.
符号の説明 Explanation of symbols
11 本装置  11 This device
21 第 1脱臭装置  21 First deodorizer
23 第 1脱臭塔  23 First deodorization tower
23a 入口  23a entrance
23b 出口  23b Exit
25 第 1充填層  25 1st packed bed
27 第 1散水管  27 1st watering pipe
29 第 1受水槽  29 1st tank
31 第 ΙρΗ計  31.
33 第 1導管  33 First conduit
35 第 1ポンプ  35 1st pump
37 第 1排水管  37 First drain pipe
39 第 1給水管  39 1st water pipe
41 第 2脱臭装置  41 Second deodorizer
43 第 2脱臭塔  43 Second deodorization tower
43c 下部  43c bottom
43cl 下部のうちダクト部の下端に連通する部分 43b 出口 43cl Lower part communicating with the lower end of the duct 43b exit
45 第 2充填層  45 Second packed bed
47 第 2散水管  47 2nd watering pipe
49 第 2受水槽  49 Second water tank
51 第 2pH計  51 2nd pH meter
53 第 2導管  53 Second conduit
55 第 2ポンプ  55 Second pump
57 第 2排水管  57 Second drain pipe
59 第 2給水管  59 Second water pipe
61 臭気ガス  61 Odor gas
63 臭気ガス (処理済)  63 Odor gas (treated)
71 ダクト部  71 Duct section
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] (本装置）  [0013] (This device)
本装置は、微生物担持物が充填された充填層と、該充填層に pHl . 4以下の水（ 散水)を散水する散水手段と、を備えてなり、該充填層内に散水と臭気ガスとを互い に向流方向で流通させることで、臭気ガスを脱臭する脱臭装置である。  The apparatus comprises a packed bed filled with a microorganism-carrying substance, and water sprinkling means for spraying water (water spray) having a pH of 1.4 or less to the packed bed, and the water spray, odor gas, and the like are contained in the packed bed. Is a deodorizing device that deodorizes odorous gas by circulating the gas in a countercurrent direction.
[0014] 微生物担持物とは、臭気ガス中に含まれる臭気成分 (例えば、硫化水素）を生物学 的に分解する等により脱臭することができる微生物 (例えば、チォバチリス属）を担持 する物であればいかなるものであってもよく何ら制限されるものではない。 [0014] The microorganism-carrying substance is a substance that carries a microorganism (for example, C. cerevisiae) that can be deodorized by biologically decomposing odor components (for example, hydrogen sulfide) contained in the odor gas. As long as it is anything, it is not limited at all.
微生物担持物が充填された充填層内に余剰汚泥が蓄積することにより、充填層を 洗浄する充填層洗浄工程を行う必要が生じることを防止又は減少させることからは、 充填層に散水される散水の pHは低い (強酸性)ことが好ましい。一方、充填層に散 水される散水の pHがあまり低いと (強酸性)、充填層を構成する微生物担持物に担 持された微生物の活性が低下するといつた問題を生じうる。従って、充填層に散水さ れる散水の pHはこれら両条件を満足するようにされることが好ましぐ通常、該 pHは 、（上限として)好ましくは 1. 4以下とされ、より好ましくは 1. 0未満とされ、最も好ましく は 0. 8以下とされ、そして（下限として)好ましくは 0. 3以上とされ、より好ましくは 0. 4 以上とされ、最も好ましくは 0. 5以上とされる（よって、該 pHは、通常、好ましくは 0. 3 〜1. 4とされ、より好ましくは 0. 4以上かつ 1. 0未満とされ、最も好ましくは 0. 5〜0. 8とされる。）。 In order to prevent or reduce the need to perform a packed bed cleaning process for cleaning the packed bed due to the accumulation of excess sludge in the packed bed filled with microbial support, water sprayed to the packed bed The pH of is preferably low (strongly acidic). On the other hand, if the pH of the water sprayed into the packed bed is too low (strongly acidic), problems may arise when the activity of the microorganisms carried on the microorganism-supported material constituting the packed bed is reduced. Accordingly, it is preferable that the pH of the water sprayed in the packed bed satisfies both of these conditions. Usually, the pH is preferably set to 1.4 or less (upper limit), more preferably 1 Less than 0, most preferably not more than 0.8, and (as a lower limit) preferably not less than 0.3, more preferably not more than 0.4. (The pH is usually preferably 0.3 to 1.4, more preferably 0.4 or more and less than 1.0, and most preferably 0.5 or more. Most preferably 0.5 to 0.8).
[0015] 充填層内における散水の流れと、充填層内における臭気ガスの流れと、は互いに 向流（逆向き、カウンターフロー）とされる。  [0015] The flow of water spray in the packed bed and the flow of odorous gas in the packed bed are counter-current to each other (reverse direction, counter flow).
これら両者の流れを向流とすることで臭気ガス中の臭気成分を効率的に除去するこ とができるだけでなぐ充填層に散水される散水の pHを 1. 4以下にすることにより充 填層内への余剰汚泥の蓄積を防止又は減少させることができるので、フラッデイング などの問題を生じることなく連続的かつ長期にわたり安定して稼動させることができ、 工業的かつ効率的に脱臭する上で有効である（なお、フラッデイングについては、特 許文献 1にも「充填層内に余剰汚泥が蓄積することによって、臭気ガス及び水の通過 面積が徐々に狭くなり、散水された水の流下が減少し、ついにはフラッディングを生 じて、臭気ガスの通気が不可能となる事態に陥り易い。このようなフラッディングを防 止したり、フラッデイングに至るまでの稼動時間を伸ばすために、臭気ガス力 該充填 層内に散水された水と共に並行して流下する方式の装置も多々提唱されて (い)る」（ 特許文献 1の発明の詳細な説明中、段落番号 0003)といったような記載がある。 )0 前述したように、本装置では、充填層に散水される散水の pHが所定領域にされる ことにより、充填層内への余剰汚泥の蓄積を防止又は減少させることができるので、 脱臭効果の優れた向流方式を採用することができる。 By making the flow of both of these countercurrents, the odorous components in the odorous gas can be efficiently removed as much as possible. It is possible to prevent or reduce the accumulation of excess sludge in the interior, so that it can be operated continuously and stably for a long time without causing problems such as flooding. (For details on flooding, Patent Document 1 also states that “the surplus sludge accumulates in the packed bed, which gradually reduces the passage of odorous gas and water, and the flow of sprinkled water is reduced. In the end, flooding is likely to occur, making it difficult to ventilate odorous gas, preventing such flooding and extending the operation time until flooding. In addition, many devices of a method of flowing down in parallel with water sprinkled in the packed bed have been proposed (in the detailed description of the invention of Patent Document 1, paragraph number 0003). ) 0 As described above, this device prevents or reduces the accumulation of excess sludge in the packed bed by setting the pH of the sprayed water in the packed bed to a predetermined range. Therefore, it is possible to adopt a countercurrent method with excellent deodorizing effect.
また、充填層内における散水の流れ方向と臭気ガスの流れ方向とを互いに向流（ 逆向き）にするには様々な方法が採用されてもよく何ら制限されるものではないが、 通常、散水を充填層の上方力 散水することで充填層中を下方に向けて流下させ、 臭気ガスを充填層の下方から上方に向けて流通させる（なお、臭気ガスを流通させる には、本装置の外部力 加圧された臭気ガスを供給するようにしたり、また、本装置 内に臭気ガスを流通させるような手段 (例えば、ブロア、ファン、コンプレッサー等）を 設けるようにすればよい。）ようにしてもよい。  In addition, various methods may be adopted to make the flow direction of the water spray and the flow direction of the odor gas in the packed bed counter-current (reverse direction), but there is no limitation. The upper force of the packed bed is sprinkled to cause the inside of the packed bed to flow downward, and the odorous gas flows from the lower side of the packed bed to the upper side. Force to supply pressurized odor gas, or provide a means (for example, a blower, a fan, a compressor, etc.) for distributing the odor gas in the apparatus. Also good.
[0016] 本装置は、さらに下記の構成 (a)及び (b)を有する処理槽を有するもの（以下、「処 理槽本装置」という。）であってもよい。 (a)内部に臭気ガス及び散水が流通する経路を有し、該経路に微生物担持物が充 填された充填層が配設されている。 [0016] This apparatus may further include a processing tank having the following configurations (a) and (b) (hereinafter referred to as "processing tank main apparatus"). (a) A path through which odor gas and water spray circulate is provided, and a packed bed filled with a microorganism-supported substance is disposed in the path.
(b)該充填層の下方底部に、該充填層を通過した散水を受ける受水部、該充填層の 下方に臭気ガスを該経路に導入する供給口、及び該充填層の上方に臭気ガスを該 経路力 排出する排出口を有する。  (b) a water receiving portion that receives water spray that has passed through the packed bed at a lower bottom portion of the packed bed, a supply port that introduces odor gas into the path below the packed bed, and an odor gas above the packed bed A discharge port for discharging the path force.
このような処理槽を備えれば、処理槽中の内部に形成される経路を臭気ガス及び 散水が流通するので、充填層に散水される散水や充填層を流通する臭気ガスが、飛 散したり散逸することを有効に防止することができる。  If such a treatment tank is provided, the odor gas and water spray circulate through the path formed inside the treatment tank, so that the water sprayed to the packed bed and the odor gas flowing through the packed bed are scattered. Or effectively dissipating.
そして、処理槽が、臭気ガスが該経路に導入されるための供給口を充填層の下方 に有すると共に、臭気ガスが該経路力 排出されるための排出口を充填層の上方に 有するので、供給ロカも処理槽内部に進入した臭気ガスは充填層を上方に向力つて 流れ排出ロカも排出される。また、充填層の下方底部に受水部を処理槽が有するこ とにより、充填層を下方に向力つて流下した散水を受けて集めることができる。これら のことにより充填層内を、臭気ガスは上方に向かって、散水は下方に向かって、それ ぞれ流れることで充填層内における両者の流れをうまく向流とすることができる。 なお、処理槽の内部に形成される臭気ガス及び散水の経路の形状及び大きさとし ては、臭気ガス及び散水が所望程度流通可能でありかつ充填層がうまく配設されるこ とができるものであれば様々なものが採用されてもよく何ら制限されるものではないが 、例えば、柱状 (例えば、円柱、角柱、楕円柱等）とされてもよい。  Since the treatment tank has a supply port for introducing odor gas into the path below the packed bed and a discharge port for discharging the odor gas to the path force above the packed bed, The odor gas that has entered the treatment tank also flows into the treatment tank by moving upward in the packed bed, and the discharge rocker is also discharged. In addition, since the treatment tank has a water receiving portion at the bottom of the packed bed, the packed bed can be collected by receiving water sprayed downward. As a result, the odor gas flows upward and the water spray flows downward in the packed bed, so that both flows in the packed bed can be made countercurrently. Note that the shape and size of the odor gas and water spray paths formed inside the treatment tank are such that the odor gas and water spray can be distributed to the desired extent and the packed bed can be arranged well. Various types may be adopted as long as they are not limited, but may be columnar (for example, a cylinder, a prism, an elliptical column, etc.), for example.
処理槽本装置の場合、処理槽の受水部に受けられた水を散水として循環使用する 循環使用手段を有するものであってもよい。  In the case of the treatment tank main apparatus, the apparatus may have a circulation use means for circulating and using water received by the water receiving part of the treatment tank as water spray.
臭気ガス中の硫黄系臭気成分 (例えば、硫ィ匕水素）が、充填層の微生物担持物に 担持された微生物により生物分解されると硫酸を生じるため、既に充填層に散水され 微生物担持物に接触した散水は、該生じた硫酸を含むことにより酸性を示す。  Sulfur-based odor components (for example, hydrogen sulfide) in odor gas are biodegraded by microorganisms supported on the microbial support in the packed bed to produce sulfuric acid. The water sprinkled with the water shows acidity by containing the generated sulfuric acid.
前述したように、充填層に散水される散水は酸性である必要があることから、既に充 填層に散水され微生物担持物に接触した散水 (該生じた硫酸を含み酸性である)の 少なくとも一部を再び充填層に散水するようにしてもょ 、。こうすることで水資源の有 効利用（充填層に散水され微生物担持物に一度接触したのみの散水を廃棄すると すれば、水資源が無駄になると共に廃水処理を要する。）、生物分解により生じた硫 酸の有効利用（通常の中性 (pHがほぼ 7)に近い水を散水する前に酸性にするには 、硫酸、塩酸、硝酸等のような酸性の薬剤を別途添加する必要がある。）等に資する ことができる。 As described above, since the water sprayed to the packed bed needs to be acidic, at least one of the water sprayed on the packed bed and contacted with the microorganism support (including the generated sulfuric acid is acidic). Sprinkle the part back into the packed bed. In this way, effective use of water resources (disposal of water that has been sprayed into the packed bed and has only contacted the microorganism carrier once is discarded. In this case, water resources are wasted and wastewater treatment is required. ), Effective use of sulfuric acid generated by biodegradation (to make it acidic before sprinkling water close to normal neutral (pH is about 7), acidic chemicals such as sulfuric acid, hydrochloric acid, nitric acid, etc.) It is necessary to add it separately.)
このように既に充填層に散水され微生物担持物に接触した散水 (硫酸を含み酸性） の少なくとも一部を再び散水とするには、処理槽の受水部に受けられた水を散水とし て循環使用する循環使用手段を有するようにすればよ!、。循環使用手段としては、 受水部に受けられた水を散水とすることができればいかなるものであってもよく何ら制 限されるものではないが、受水部に受けられた水を導く導管と、その水を圧送するた めのポンプと、によって構成されてもよい。  In order to re-sprinkle at least part of the water spray (including sulfuric acid and acidity) that has already been sprayed into the packed bed and contacted with the microbial support, the water received in the water receiving part of the treatment tank is circulated as water spray. Make sure you have a circulating means to use! As the circulation means, any water can be used as long as the water received by the water receiving section can be sprinkled, and there is no limitation. However, there is a conduit for guiding the water received by the water receiving section. And a pump for pumping the water.
なお、処理槽の受水部に受けられた水の全部を散水として循環使用することを必 ずしも要するものではなく（無論、全部を循環使用するようにしてもよい。）、受水部に 受けられた水の少なくとも一部を再び散水として循環使用するようにしてもよい。 本装置を 2以上備えた脱臭装置であって、 1の脱臭装置である前段脱臭装置で脱 臭処理された臭気ガスが、後続する 1以上の脱臭装置である後段脱臭装置に連続的 に供給されて脱臭処理され、かつ前段脱臭装置における散水の pHよりも、後段脱臭 装置における散水の PHが低くなるようにしてもよい（以下、「直列本装置」という。 ) o 即ち、直列に連結された 2以上の本装置が、前段脱臭装置と後段脱臭装置 (前段 脱臭装置に後続 (直下流側)する。なお、複数が存してもよぐこの場合には、前段脱 臭装置で脱臭処理された臭気ガスが複数の後段脱臭装置に枝分かれするように供 給される。）とを含んでなり、前段脱臭装置により脱臭された臭気ガスが、後段脱臭装 置により連続的に脱臭されるようにする。このとき前段脱臭装置における散水の pHよ りも、後段脱臭装置における散水の pHを低くしてもよぐこのようにすることで硫ィ匕水 素の除去率を向上させることができる。 In addition, it is not always necessary to circulate and use all the water received in the water receiving part of the treatment tank as a sprinkling water (of course, the whole water may be circulated and used). At least part of the received water may be recycled as watering. The deodorizing apparatus provided with two or more of the apparatuses, wherein the odor gas deodorized by the first-stage deodorizing apparatus that is the first deodorizing apparatus is continuously supplied to the subsequent second-stage deodorizing apparatus that is one or more deodorizing apparatuses. is deodorized Te, and than the pH of the water spray in front deodorizing apparatus may also be P H watering in subsequent deodorization apparatus is lowered (hereinafter, referred to as "series this device".) o in other words, connected in series Two or more of these devices are connected to the front-stage deodorization device and the rear-stage deodorization device (following the front-stage deodorization device (on the downstream side). So that the odor gas deodorized by the former deodorizer is continuously deodorized by the latter deodorizer. To. At this time, the removal rate of sulfurous hydrogen can be improved by lowering the pH of the water spray in the latter-stage deodorizer rather than the pH of the water spray in the former-stage deodorizer.
なお、前段脱臭装置における散水の pHは、充填層内への余剰汚泥の蓄積を防止 又は減少させることと、充填層を構成する微生物担持物に担持された微生物の活性 を維持することと、を満足されることからは、通常、該 pHは、（上限として)好ましくは 1 . 4以下とされ、より好ましくは 1. 2以下とされ、最も好ましくは 1. 0未満とされ、そして (下限として)好ましくは 0. 6以上とされ、より好ましくは 0. 7以上とされ、最も好ましく は 0. 75以上とされる（よって、該 pHは、通常、好ましくは 0. 6〜1. 4とされ、より好ま しくは 0. 7〜1. 2とされ、最も好ましくは 0. 75以上 1. 0未満とされる。；)。 In addition, the pH of the water spray in the pre-deodorizing device is to prevent or reduce the accumulation of excess sludge in the packed bed, and to maintain the activity of the microorganisms supported on the microorganism-supported material constituting the packed bed. Satisfactory, usually the pH is preferably (upper limit) preferably 1.4 or less, more preferably 1.2 or less, most preferably less than 1.0, and (As the lower limit) is preferably 0.6 or more, more preferably 0.7 or more, and most preferably 0.75 or more (therefore, the pH is usually preferably 0.6 to 1. 4, more preferably from 0.7 to 1.2, and most preferably from 0.75 to less than 1.0;).
そして、後段脱臭装置における散水の pHは、充填層内への余剰汚泥の蓄積を防 止又は減少させることと、充填層を構成する微生物担持物に担持された微生物の活 性を維持することと、を満足されることからは、通常、該 pHは、（上限として)好ましく は 0. 8以下とされ、より好ましくは 0. 7以下とされ、最も好ましくは 0. 6以下とされ、そ して（下限として)好ましくは 0. 3以上とされ、より好ましくは 0. 4以上とされ、最も好ま しくは 0. 5以上とされる（よって、該 pHは、通常、好ましくは 0. 3〜0. 8とされ、より好 ましくは 0. 4〜0. 7とされ、最ち好ましくは 0. 5〜0. 6とされる。；)。  The pH of the water spray in the latter-stage deodorization device prevents or reduces the accumulation of excess sludge in the packed bed, and maintains the activity of the microorganisms supported on the microorganism-supported material constituting the packed bed. In general, the pH is preferably not more than 0.8 (as an upper limit), more preferably not more than 0.7, most preferably not more than 0.6, and (As a lower limit), preferably 0.3 or more, more preferably 0.4 or more, and most preferably 0.5 or more (therefore, the pH is usually preferably 0.3 to 0.8, more preferably 0.4 to 0.7, and most preferably 0.5 to 0.6;).
[0019] (本方法） [0019] (This method)
本方法は、微生物担持物が充填された充填層に、 pHl. 4以下の水 (散水）と臭気 ガスとを互いに向流方向で流通させることで、臭気ガスを脱臭する脱臭方法である。 微生物担持物 (微生物を担持する物）が充填された充填層内に余剰汚泥が蓄積す ることにより、充填層を洗浄する充填層洗浄工程を行う必要が生じることを防止又は 減少させることからは、充填層に散水される散水の pHを所定範囲のものにすべきこと は前述の本装置と同様であるのでここでは説明を省略する。なお、散水の pHの該所 定範囲も前述の本装置と同様であるのでここでは説明を省略する。  This method is a deodorizing method in which odorous gas is deodorized by causing water (watering) having a pH of 4 or less and odorous gas to flow through each other in a countercurrent direction through a packed bed filled with a microorganism support. To prevent or reduce the need to perform a packed bed cleaning process that cleans the packed bed due to the accumulation of excess sludge in the packed bed filled with the microorganism-supported material (thing that supports microorganisms) The pH of the water sprayed in the packed bed should be within a predetermined range, as is the case with the above-described apparatus, and the description thereof is omitted here. In addition, since the predetermined range of the pH of the water spray is the same as that of the above-described apparatus, the description thereof is omitted here.
そして、充填層内における散水の流れと、充填層内における臭気ガスの流れと、が 互いに向流 (逆向き、カウンターフロー）とされる意義も、前述の本装置と同様である のでここでは説明を省略する。  And the meaning that the flow of water spray in the packed bed and the flow of odorous gas in the packed bed are counter-current to each other (reverse direction, counter flow) is also the same as the above-mentioned apparatus, and will be described here. Is omitted.
[0020] また、本方法は、微生物担持物が充填された 2以上の充填層に、 pHl. 4以下の水 と臭気ガスとを互いに向流方向で流通させる臭気ガスの脱臭方法であって、 1の充填 層である前段充填層を通過させた臭気ガスを、後続する 1以上の充填層である後段 充填層に連続的に供給して通過させ、かつ前段充填層に通過させる水の pHよりも、 後段充填層に通過させる水の pHを低くすることを特徴とするようにしてもょ 、。 [0020] Further, the present method is a method for deodorizing odor gas in which water having a pH of 4 or less and odor gas are circulated in a countercurrent direction to two or more packed beds filled with a microorganism-supported substance, Odor gas that has passed through the first packed bed, which is the first packed bed, is continuously supplied to the subsequent packed bed, which is one or more of the subsequent packed beds, and then passed through the first packed bed. However, it may be characterized by lowering the pH of the water passed through the latter packed bed.
即ち、臭気ガスを、直列に連続した 2以上の充填層により脱臭するものであり、これ ら 2以上の充填層が前段充填層と後段充填層 (前段充填層に後続 (直下流側)する。 なお、複数が存してもよぐこの場合には、前段充填層で脱臭処理された臭気ガスが 複数の後段充填層に枝分かれするように供給される。）とを含んでなり、前段充填層 により脱臭された臭気ガスが、後段充填層により連続的に脱臭されるようにする。この とき前段充填層に通過させる水 (散水)の pHよりも、後段充填層に通過させる水 (散 水）の pHを低くしてもよぐこのようにすることで前述の直列本装置と同様の効果を奏 するのでここでは詳し 、説明を省略する。 That is, the odor gas is deodorized by two or more packed beds that are continuously connected in series, and these two or more packed beds are followed by a front packed bed and a rear packed bed (following the upstream packed bed (direct downstream side)). In this case, a plurality of odorous gases deodorized in the preceding packed bed are supplied so as to branch into a plurality of subsequent packed beds. The odor gas deodorized by the front packed bed is continuously deodorized by the rear packed bed. At this time, it is possible to lower the pH of the water (water spray) that passes through the subsequent packed bed rather than the pH of the water (water spray) that passes through the upstream packed bed. Since the effect of the above is achieved, the detailed description is omitted here.
また、前段充填層に通過させる水（散水）の pHは、前述の直列本装置における前 段脱臭装置における散水の pHと同様に決定されればよぐさらに、後段充填層に通 過させる水 (散水）の pHは、前述の直列本装置における後段脱臭装置における散水 の pHと同様に決定されればよいので、ここでは詳しい説明を省略する。  In addition, the pH of water (sprinkling) that passes through the front packed bed may be determined in the same manner as the pH of the sprinkled water in the preceding deodorizing device in the above-mentioned series main unit, and water that passes through the subsequent packed bed ( Since the pH of the water spray may be determined in the same manner as the pH of the water spray in the latter-stage deodorization device in the above-mentioned series main unit, detailed description thereof is omitted here.
[0021] 本方法は、充填層を通過した散水を再び充填層に散水して循環使用するものであ つてもよい。 [0021] The method may be one in which the water spray that has passed through the packed bed is sprayed again into the packed bed and used in circulation.
このように充填層を通過した散水を再び充填層に散水する散水として循環使用す れば、脱臭により生じる硫酸及び水資源を有効利用することができることは前述の本 装置と同様であるのでここでは説明を省略する。  In this way, if the water spray that has passed through the packed bed is recycled as water sprayed to the packed bed again, sulfuric acid and water resources generated by deodorization can be used effectively. Description is omitted.
[0022] (本製法） [0022] (This manufacturing method)
本製法は、微生物担持物が充填された充填層に、 pHl. 4以下の水と硫黄系臭気 成分を含む臭気ガスとを互いに向流方向で流通させ、該充填層から排出された酸性 水を回収する工程を含む、硫酸を含む酸性水の製造方法である。  In this production method, water having a pH of less than 4 and an odor gas containing a sulfur-based odor component are circulated in a countercurrent direction in a packed bed filled with a microbial support, and acidic water discharged from the packed bed is discharged. It is the manufacturing method of the acidic water containing a sulfuric acid including the process to collect | recover.
前述したように、臭気ガス中の硫黄系臭気成分 (例えば、硫ィ匕水素）が、充填層の 微生物担持物に担持された微生物により生物分解されると硫酸を生じるため、充填 層に散水され微生物担持物に接触した散水は、該生じた硫酸を含有する（これにより 充填層に散水される前よりも、充填層に散水され微生物担持物に接触した散水は、 より酸性を示す。 ) oよって、微生物担持物が充填された充填層に、 pHl. 4以下の水 と臭気ガス (硫黄系臭気成分を含む）とを互いに向流方向で流通させることによって、 微生物担持物に担持された微生物により生物分解されて生じた硫酸を含む酸性水 を製造することができる。  As described above, since sulfur-based odor components (for example, hydrogen sulfide) in odor gas are biodegraded by microorganisms supported on the microbial support of the packed bed, sulfuric acid is generated, and thus water is sprayed on the packed bed. The water spray that has come into contact with the microorganism carrier contains the generated sulfuric acid (the water spray that has been sprayed into the packed bed and contacted with the microorganism carrier is more acidic than before the water sprayed into the packed bed.) O Therefore, the microorganisms supported on the microorganism-supported substance are made to flow through the packed bed filled with the microorganism-supported substance in a counter-current direction with water having an pH of less than 4 and odorous gas (including sulfur-based odor components). Acidic water containing sulfuric acid produced by biodegradation can be produced.
本製法は、上述の本装置を用いて実施することができる。充填層に流通させる水の pH条件としては、前述する本装置及び本方法で採用する条件を同様に採用するこ とができる。また、酸性水の製造は、一旦、充填層から回収した (充填層から排出され た)酸性水を、再度、微生物担持物が充填された充填層に、硫黄系臭気成分を含む 臭気ガスと互いに向流方向で流通させることによって、実施することもできる。こうする ことで、酸性水を複数回にわたって微生物担持物を充填した充填層に臭気ガスととも に流通させることにより、酸性水中の硫酸量が、臭気ガス中の硫黄系臭気成分の微 生物分解により増加することにより、酸性水に硫酸を濃縮することができる。 This manufacturing method can be implemented using the above-described apparatus. Water flowing through the packed bed As the pH conditions, the conditions employed in the present apparatus and method described above can be similarly employed. In addition, in the production of acidic water, once the acidic water recovered from the packed bed (discharged from the packed bed) is once again mixed with the odorous gas containing sulfur-based odor components in the packed bed filled with the microbial support. It can also be implemented by circulating in the counterflow direction. In this way, the acidic water is circulated along with the odor gas through the packed bed filled with the microbial support multiple times, so that the amount of sulfuric acid in the acidic water is reduced by the microbiological decomposition of the sulfur-based odor components in the odor gas. By increasing, sulfuric acid can be concentrated in acidic water.
本製法により製造された酸性水は、臭気ガス中の硫黄系臭気成分 (例えば、硫ィ匕 水素）が充填層の微生物担持物に担持された微生物により生物分解されて生じた硫 酸を含むため、硫酸の供給源として用いることができる。  The acidic water produced by this production method contains sulfuric acid produced by biodegradation of the sulfur-based odor component (for example, hydrogen sulfide) in the odor gas by the microorganisms supported on the microbial support in the packed bed. It can be used as a source of sulfuric acid.
実施例  Example
[0023] 以下、本発明の実施例を図面を参照して説明する。し力しながら、これらによって本 発明は何ら制限されるものではない。  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited by these.
[0024] 図 1は、本発明の脱臭装置 (本装置） 11を示す系統図である。図 1を参照して、本 装置 11について説明する。  FIG. 1 is a system diagram showing a deodorizing apparatus (present apparatus) 11 of the present invention. The device 11 will be described with reference to FIG.
本装置 11は、臭気ガスを受け入れ脱臭する第 1脱臭装置 21と、第 1脱臭装置 21に より脱臭された臭気ガスを受け入れ脱臭する第 2脱臭装置 41と、を含んでいる。  This device 11 includes a first deodorizing device 21 that receives and deodorizes odor gas, and a second deodorizing device 41 that receives and deodorizes the odor gas deodorized by the first deodorizing device 21.
[0025] 第 1脱臭装置 21は、第 1脱臭塔 23と、第 1脱臭塔 23の内部に配設された第 1充填 層 25と、第 1充填層 25の上方力も第 1充填層 25に散水するための第 1散水管 27と、 第 1充填層 25の下方 (下方底部）に設けられた第 1受水槽 29と、第 1受水槽 29中の 水の pHを測定するための第 ΙρΗ計 31と、第 1受水槽 29中の水を第 1散水管 27へ 移送するための第 1導管 33と、第 1受水槽 29中の水を第 1導管 33を経由して第 1散 水管 27へ圧送するための第 1ポンプ 35と、第 1受水槽 29中の水が所定量以上にな つたとき等に排水するための第 1排水管 37と、第 1受水槽 29中に水を補給するため の第 1給水管 39と、を備えている。  [0025] The first deodorizing device 21 includes a first deodorizing tower 23, a first packed bed 25 disposed in the first deodorized tower 23, and an upward force of the first packed bed 25 to the first packed bed 25. The first sprinkler pipe 27 for sprinkling water, the first water receiving tank 29 provided below (lower bottom) of the first packed bed 25, and the first water tank 29 for measuring the pH of water in the first water receiving tank 29 A total of 31 and a first conduit 33 for transferring the water in the first water receiving tank 29 to the first sprinkler pipe 27, and a water in the first water receiving tank 29 via the first conduit 33 for the first sprinkler pipe The first pump 35 for pumping to 27, the first drain pipe 37 for draining when the water in the first water receiving tank 29 exceeds a predetermined amount, and the water in the first water receiving tank 29 And a first water supply pipe 39 for replenishment.
[0026] 第 1脱臭塔 23は、略直方体形状の内部空間を有しており、直方体の一辺が鉛直方 向をほぼ向いた直四角塔 (無底有蓋。水平面による断面においては内部空間は 2m X 2mの正方形)形状をしており、該内部空間には第 1充填層 25が配設されている。 そして、第 1脱臭塔 23は、該内部空間に配設された第 1充填層 25の下方及び上方 に、それぞれ該内部空間への臭気ガス 61の入口 23a及び該内部空間からの臭気ガ スの出口 23bを有している。また、第 1脱臭塔 23の下部は、第 1受水槽 29の上部に 連通している。 [0026] The first deodorization tower 23 has a substantially rectangular parallelepiped internal space, and a rectangular tower with one side of the rectangular parallelepiped substantially oriented in the vertical direction (bottomless cover. X 2 m square), and the first filling layer 25 is disposed in the internal space. The first deodorization tower 23 has an inlet 23a for the odor gas 61 to the internal space and an odor gas from the internal space below and above the first packed bed 25 disposed in the internal space, respectively. It has an outlet 23b. In addition, the lower part of the first deodorization tower 23 communicates with the upper part of the first water receiving tank 29.
第 1充填層 25は、微生物が担持された微生物担持物 (具体的には、スポンジ担体 を用いている。）が充填されることで形成されており、ここでは第 1充填層 25の高さは lmである。  The first packed layer 25 is formed by filling a microorganism-supported material (specifically, using a sponge carrier) on which microorganisms are supported. Here, the height of the first packed layer 25 is set. Is lm.
第 1脱臭塔 23の内部空間のうち、第 1充填層 25の上方には第 1散水管 27が配設さ れており、第 1受水槽 29中の水が第 1導管 33を経由して第 1ポンプ 35により第 1散水 管 27 (第 1散水管 27は、図示しないが水を噴出するためのノズルが適宜設けられて いる。）へ圧送されることで上方力も第 1充填層 25に散水される。  In the internal space of the first deodorization tower 23, a first sprinkling pipe 27 is disposed above the first packed bed 25, and the water in the first water receiving tank 29 passes through the first conduit 33. The upward force is also applied to the first packed bed 25 by being pumped by the first pump 35 to the first sprinkling pipe 27 (the first sprinkling pipe 27 is appropriately provided with a nozzle for ejecting water (not shown)). Watered.
第 1散水管 27から第 1充填層 25に散水された水は、第 1充填層 25を構成する微生 物担持物の表面に沿って流下することで第 1充填層 25を通過し、最終的には第 1充 填層 25の下端力も滴下し第 1受水槽 29により回収される。このようにして第 1充填層 25を通過し第 1受水槽 29に回収された水は、再び、第 1導管 33を経由して第 1ボン プ 35により第 1散水管 27に圧送されることで繰り返し使用される。なお、第 1受水槽 2 9中の水の pHは、第 ΙρΗ計 31により継続的に測定される。  The water sprinkled from the first sprinkling pipe 27 to the first packed bed 25 flows down the surface of the microparticle carrier constituting the first packed bed 25, passes through the first packed bed 25, and finally. Specifically, the lower end force of the first filling layer 25 is also dropped and collected by the first water receiving tank 29. The water thus passed through the first packed bed 25 and collected in the first water receiving tank 29 is again pumped to the first sprinkling pipe 27 by the first pump 35 via the first conduit 33. Used repeatedly. The pH of the water in the first tank 29 is continuously measured by the first ΙρΗ meter 31.
[0027] 一方、臭気ガス 61は、入口 23aから第 1脱臭塔 23の内部空間に進入した後（なお、 臭気ガス 61は、本装置 11の外部に配設されたブロア（図示せず）により昇圧された 後、入口 23aに供給される。即ち、本装置 11における臭気ガス 61の流通は、入口 23 aと出口 43bとの間の圧力差によって行われる。）、該内部空間を上昇し、第 1充填層 25を通過した後、出口 23bから排出される（後で詳述する第 2脱臭装置 41へ向かう。 )。即ち、第 1充填層 25においては、臭気ガス 61は上方向に流動し、第 1散水管 27 力も第 1充填層 25に散水された水は下方向に流動する（互いに向流)。 On the other hand, after the odor gas 61 enters the internal space of the first deodorization tower 23 from the inlet 23a (the odor gas 61 is sent by a blower (not shown) provided outside the apparatus 11). After the pressure is increased, the gas is supplied to the inlet 23a, that is, the odor gas 61 in the apparatus 11 is circulated by the pressure difference between the inlet 23a and the outlet 43b. After passing through the first packed bed 25, it is discharged from the outlet 23b (goes to the second deodorizing device 41 described in detail later). That is, in the first packed bed 25, the odor gas 61 flows upward, and the water sprayed in the first packed bed 25 also flows downward (counterflow with each other).
出口 23bから排出された臭気ガスは、ダクト部 71の上端力もダクト部 71を下降し、 ダクト部 71の下端から第 2脱臭装置 41へ進入する。  The odor gas discharged from the outlet 23b also descends the duct portion 71 at the upper end force of the duct portion 71 and enters the second deodorizing device 41 from the lower end of the duct portion 71.
[0028] 第 2脱臭装置 41は、第 2脱臭塔 43と、第 2脱臭塔 43の内部に配設された第 2充填 層 45と、第 2充填層 45の上方力も第 2充填層 45に散水するための第 2散水管 47と、 第 2充填層 45の下方（下方底部）に設けられた第 2受水槽 49と、第 2受水槽 49中の 水の pHを測定するための第 2pH計 51と、第 2受水槽 49中の水を第 2散水管 47へ 移送するための第 2導管 53と、第 2受水槽 49中の水を第 2導管 53を経由して第 2散 水管 47へ圧送するための第 2ポンプ 55と、第 2受水槽 49中の水を排水するための 第 2排水管 57と、第 2受水槽 49中に水を補給するための第 2給水管 59と、を備えて いる。 [0028] The second deodorizing device 41 includes a second deodorizing tower 43, a second packed layer 45 disposed inside the second deodorized tower 43, and the upward force of the second packed layer 45 to the second packed layer 45. A second sprinkler pipe 47 for watering, A second water receiving tank 49 provided under the second packed bed 45 (lower bottom), a second pH meter 51 for measuring the pH of water in the second water receiving tank 49, and a second water receiving tank 49 A second conduit 53 for transferring water to the second sprinkler pipe 47 and a second pump 55 for pumping water in the second water receiving tank 49 to the second sprinkler pipe 47 via the second conduit 53; A second drain pipe 57 for draining the water in the second water receiving tank 49 and a second water pipe 59 for supplying water to the second water receiving tank 49 are provided.
[0029] 第 2脱臭塔 43は、略直方体形状の内部空間を有しており、直方体の一辺が鉛直方 向をほぼ向いた直四角塔 (無底有蓋。水平面による断面においては内部空間は 2m X 2mの正方形)形状をしており、下部 43cはダクト部 71の下端と連通していると共に 、上部には臭気ガス (処理済） 63の出口 43bを有している。また、第 2脱臭塔 43の下 部 43cは、第 2受水槽 49の上部に連通している。  [0029] The second deodorization tower 43 has a substantially rectangular parallelepiped internal space, and a rectangular tower with one side of the rectangular parallelepiped facing substantially in the vertical direction (bottomless cover. X 2m square), the lower part 43c communicates with the lower end of the duct part 71, and the upper part has an outlet 43b of odor gas (treated) 63. Further, the lower part 43 c of the second deodorization tower 43 communicates with the upper part of the second water receiving tank 49.
第 2脱臭塔 43の内部空間のうち、ダクト部 71の下端よりも上方かつ出口 43bよりも 下方となる空間には、第 2充填層 45が配設されている。第 2充填層 45は、微生物が 担持された微生物担持物 (具体的には、スポンジ担体を用いている。）が充填される ことで形成されており、ここでは第 2充填層 45の高さは lmである。  Of the internal space of the second deodorization tower 43, the second packed bed 45 is disposed in a space above the lower end of the duct portion 71 and below the outlet 43b. The second packed layer 45 is formed by filling a microorganism-supported material (specifically, using a sponge carrier) on which microorganisms are supported. Here, the height of the second packed layer 45 is determined. Is lm.
第 2脱臭塔 43の内部空間のうち、第 2充填層 45の上方には第 2散水管 47が配設さ れており、第 2受水槽 49中の水が第 2導管 53を経由して第 2ポンプ 55により第 2散水 管 47 (第 2散水管 47は、図示しないが水を噴出するためのノズルが適宜設けられて いる。）へ圧送されることで上方力 第 2充填層 45に散水される。  In the internal space of the second deodorization tower 43, a second sprinkling pipe 47 is disposed above the second packed bed 45, and the water in the second water receiving tank 49 passes through the second conduit 53. The second pump 55 pumps the second sprinkling pipe 47 (the second sprinkling pipe 47 is appropriately provided with a nozzle for ejecting water (not shown)), thereby causing upward force to be applied to the second packed bed 45. Watered.
第 2散水管 47から第 2充填層 45に散水された水は、第 2充填層 45を構成する微生 物担持物の表面に沿って流下することで第 2充填層 45を通過し、最終的には第 2充 填層 45の下端力 滴下し第 2受水槽 49により回収される。このようにして第 2充填層 45を通過し第 2受水槽 49に回収された水は、再び、第 2導管 53を経由して第 2ボン プ 55により第 2散水管 47に圧送されることで繰り返し使用される。なお、第 2受水槽 4 9中の水の pHは、第 2pH計 51により継続的に測定される。  The water sprinkled from the second sprinkling pipe 47 to the second packed bed 45 flows down the surface of the microparticle carrier constituting the second packed bed 45, thereby passing through the second packed bed 45, and finally. Specifically, the lower end force of the second filling layer 45 is dropped and collected by the second water receiving tank 49. The water thus passed through the second packed bed 45 and collected in the second water receiving tank 49 is again pumped to the second sprinkling pipe 47 by the second pump 55 via the second conduit 53. Used repeatedly. The pH of the water in the second water receiving tank 49 is continuously measured by the second pH meter 51.
[0030] ダクト部 71の下端力も第 2脱臭塔 43の下部 43cに進入した臭気ガスは、第 2脱臭 塔 43の内部空間を上昇し、第 2充填層 45を通過した後、出口 43bから排出される。 即ち、第 2充填層 45においては、臭気ガスは上方向に流動し、第 2散水管 47から第 2充填層 45に散水された水は下方向に流動する（互いに向流)。 [0030] Odor gas that has entered the lower portion 43c of the second deodorization tower 43 also rises in the inner space of the second deodorization tower 43, passes through the second packed bed 45, and is discharged from the outlet 43b. Is done. That is, in the second packed bed 45, the odor gas flows upward, and the second sprinkling pipe 47 2 Water sprayed in the packed bed 45 flows downward (counterflow with each other).
以上のように、入口 23aから第 1脱臭塔 23の内部空間に進入した臭気ガスは、第 1 充填層 25を通過した後に出口 23bから排出され、ダクト部 71を通過して第 2脱臭塔 4 3の内部空間に進入し、第 2充填層 45を通過した後に出口 43bから排出される。この 第 1充填層 25 (第 1散水管 27から散水された水が流下して 、る。）と第 2充填層 45 ( 第 2散水管 47から散水された水が流下している。 )とを臭気ガスが通過することにより 脱臭される。  As described above, the odor gas that has entered the internal space of the first deodorizing tower 23 from the inlet 23a is discharged from the outlet 23b after passing through the first packed bed 25, passes through the duct portion 71, and passes through the second deodorizing tower 4 After entering the internal space 3 and passing through the second packed bed 45, it is discharged from the outlet 43b. The first packed bed 25 (the water sprinkled from the first sprinkling pipe 27 flows down) and the second packed bed 45 (the water sprinkled from the second sprinkling pipe 47 flows down) It is deodorized by the passage of odor gas.
臭気ガス中の硫黄系臭気成分 (例えば、硫ィ匕水素）が、第 1充填層 25及び第 2充 填層 45に担持された微生物により生物分解される際に硫酸を生じるため、循環使用 される水 (第 1受水槽 29及び第 2受水槽 49中の水）の pHは低下する（酸性が強くな る)。このような pHが低下した循環使用される水 (第 1受水槽 29及び第 2受水槽 49中 の水)を第 1充填層 25及び第 2充填層 45に散水することで第 1充填層 25及び第 2充 填層 45を酸性に保つことができる。  Since sulfur-based odor components (for example, hydrogen sulfide) in the odor gas are biodegraded by microorganisms supported in the first packed bed 25 and the second packed bed 45, sulfuric acid is generated, so that it is recycled. PH of water (water in the first receiving tank 29 and the second receiving tank 49) decreases (acidity becomes stronger). The first packed bed 25 is sprinkled through the first packed bed 25 and the second packed bed 45 by circulating water (water in the first received tank 29 and the second received tank 49) having a lowered pH. In addition, the second filling layer 45 can be kept acidic.
図 1に示した本装置 11を用いて、脱臭実験を行った。  A deodorization experiment was conducted using the apparatus 11 shown in FIG.
(実施例） (Example)
(1)まず、第 1受水槽 29中に汚泥濃度約 13000mgZl (リットル)の活性汚泥を 2001 (200リットル)投入した後、さらに第 1受水槽 29中に第 1給水管 39を用いて工業用 水 20001 (2000リットル）を注入した。同様に、第 2受水槽 49中に汚泥濃度約 13000 mgZl (リットル)の活性汚泥を 2001 (200リットル)投入した後、さらに第 2受水槽 49 中に第 2給水管 59を用いて工業用水 20001 (2000リットル)を注入した。  (1) First, activated sludge with a sludge concentration of about 13000 mgZl (liter) was introduced into the first water receiving tank 29 in 2001 (200 liters), and then the first water receiving tank 29 was used for industrial purposes using the first water supply pipe 39. Water 20001 (2000 liters) was injected. Similarly, after the activated sludge having a sludge concentration of about 13000 mgZl (liter) was put into the second water receiving tank 49 in 2001 (200 liter), the industrial water 20001 was further added to the second water receiving tank 49 using the second water supply pipe 59. (2000 liters) was injected.
(2)第 1ポンプ 35と第 2ポンプ 55とを起動し、第 1散水管 27と第 2散水管 47とから散 水を開始する。なお、それぞれの散水量は、第 1散水管 27が 2001 (200リットル) Z 分であり、第 2散水管 47が 2001(200リットル) Z分であった。  (2) Start the first pump 35 and the second pump 55 and start watering from the first watering pipe 27 and the second watering pipe 47. In addition, the watering amount of each of the first watering pipe 27 was 2001 (200 liters) Z and the second watering pipe 47 was 2001 (200 liters) Z.
(3)臭気ガス 61中に含まれる硫ィ匕水素濃度を気体検知管により分析したところ、 200 ppmであった。また、臭気ガス 61中に含まれるアンモニア濃度を気体検知管により分 祈したところ、 23ppmであった。この臭気ガス 61を体積流量 75m3 (75000リットル） Z分により入口 23aから第 1脱臭塔 23の内部空間に圧送した (圧送するためのプロ ァは図示しない。 ) oなお、臭気ガス 61の温度は、約 25°Cであった。第 1脱臭塔 23に おける空筒線速度は 0. 3mZ秒であり、第 2脱臭塔 43における空筒線速度は 0. 3m Z秒であった。 (3) The concentration of hydrogen sulfide contained in the odorous gas 61 was analyzed by a gas detector tube and found to be 200 ppm. In addition, when ammonia concentration contained in the odor gas 61 was prayed by a gas detector tube, it was 23 ppm. This odorous gas 61 was pumped from the inlet 23a to the internal space of the first deodorizing tower 23 by a volumetric flow rate of 75m 3 (75000 liters) Z (the profile for pumping is not shown.) O The temperature of the odorous gas 61 Was about 25 ° C. In the first deodorization tower 23 The hollow line speed in the second deodorizing tower 43 was 0.3 mZ seconds, and the hollow line speed in the second deodorizing tower 43 was 0.3 mZ seconds.
(4)上記（2)及び (3)のように第 1散水管 27及び第 2散水管 47からの散水と、臭気ガ ス 61の装入 (圧送)と、を連続して行ったところ、臭気ガス 61の装入 (圧送）開始から ほぼ 30日で臭気ガス (処理済） 63中の硫ィ匕水素濃度は 1. 2ppm (気体検知管）とな ると共に、臭気ガス (処理済） 63中のアンモニア濃度は検出限界未満 (Oppm) (気体 検知管）となり（なお、第 1脱臭塔 23の出口 23bにおいても検出限界未満 (Oppm)で あった。）、それ以降安定した脱臭が持続した。なお、第 ΙρΗ計 31が 0. 7〜1. 4の範 囲になるよう監視を継続し、この下限 0. 7未満を示す場合には第 1散水管 27からの 散水量を 2501 (250リットル) Z分に増加させ、上限 1. 4を超える場合には第 1散水 管 27からの散水量を 1501 (150リットル） Z分に減少させることで ρΗが 0. 7〜1. 4の 範囲に収まるようした。第 2pH計 51は 0. 5〜0. 8の範囲になるよう監視を継続し、こ の下限 0. 5未満を示す場合には第 2散水管 47からの散水量を 2501 (250リットル) Z 分に増加させ、上限 0. 8を超える場合には第 2散水管 47からの散水量を 1501 (150 リットル) /分に減少させることで pHが 0. 5〜0. 8の範囲に収まるようにした。このよう に特許文献 1中の請求項 1や請求項 3に記載の脱臭装置や脱臭方法では pH調整の ためのアルカリ剤 (水酸ィ匕ナトリウム、炭酸ナトリウム、炭酸水素ナトリウム、水酸化カリ ゥム、炭酸カリウム、炭酸水素カリウム等。特許文献 1中の段落番号 0010前段参照） を要した力 本装置 11では必要としない。  (4) As shown in (2) and (3) above, the watering from the first watering pipe 27 and the second watering pipe 47 and the charging (pumping) of the odor gas 61 were performed continuously. Odor gas (processed) The sulfuric acid hydrogen concentration in the odor gas (processed) 63 became 1.2 ppm (gas detector tube) and the odor gas (processed) 63 The ammonia concentration in the sample was below the detection limit (Oppm) (gas detector tube) (note that it was also below the detection limit (Oppm) at the outlet 23b of the first deodorization tower 23), and stable deodorization continued thereafter. . Monitoring is continued so that the ΙρΙ meter 31 is in the range of 0.7 to 1.4, and if the lower limit is less than 0.7, the amount of water sprayed from the first sprinkler pipe 27 is set to 2501 (250 liters). ) Increase to Z minutes, and if the upper limit is exceeded 1.4, decrease the amount of water sprayed from the first sprinkling pipe 27 to 1501 (150 liters) Z minutes so that ρΗ is in the range of 0.7 to 1.4. I tried to fit. The second pH meter 51 continues to be monitored within the range of 0.5 to 0.8. If the lower limit is less than 0.5, the amount of water sprayed from the second sprinkler tube 47 is set to 2501 (250 liters) Z. In order to keep the pH within the range of 0.5 to 0.8 by decreasing the amount of water from the second sprinkler tube 47 to 1501 (150 liters) / min. I made it. As described above, in the deodorizing apparatus and the deodorizing method according to claims 1 and 3 of Patent Document 1, an alkaline agent for adjusting pH (sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide) , Potassium carbonate, potassium hydrogen carbonate, etc. The force required for Paragraph No. 0010 in Patent Document 1) This device 11 does not require force.
(5)臭気ガス 61の装入 (圧送）開始からほぼ 1600日経過したとき、第 1充填層 25及 び第 2充填層 45における閉塞の徴候 (具体的には、これら第 1充填層 25及び第 2充 填層 45における圧力損失が lOOmmAq (水柱)程度に増大してくる。）がみられ第 1 充填層 25及び第 2充填層 45における余剰汚泥の蓄積を示すものと考えられたので 、第 1散水管 27からの散水を 3001 (300リットル) Z分にそして第 2散水管 47からの 散水を 3001 (300リットル) Z分に増加させ約 10分間操業したところ、前述の閉塞の 徴候 (具体的には、第 1充填層 25及び第 2充填層 45における圧力損失の増大)が消 失した (第 1充填層 25及び第 2充填層 45における余剰汚泥が洗浄されたものと考え られる。）。 なお、上記において、第 lpH計 31で監視する pHを 0. 7〜1. 2または 0. 75以上 1 . 0未満の範囲に設定しても、また第 2pH計 51で監視する pHを 0. 5〜0. 7または 0 . 5〜0. 6の範囲に設定してもよぐいずれも同様の効果が得られる。 (5) When approximately 1600 days have passed since the start of charging (pressure feeding) of the odorous gas 61, signs of blockage in the first packed bed 25 and the second packed bed 45 (specifically, these first packed bed 25 and The pressure loss in the second packed bed 45 increases to about lOOmmAq (water column).) It was thought that this indicates accumulation of excess sludge in the first packed bed 25 and the second packed bed 45. Operation for about 10 minutes with watering from the first sprinkling pipe 27 increased to 3001 (300 liters) Z and sprinkling from the second sprinkling pipe 47 to 3001 (300 liters) Z min. Specifically, it is considered that the increase in pressure loss in the first packed bed 25 and the second packed bed 45 has disappeared (the excess sludge in the first packed bed 25 and the second packed bed 45 has been cleaned). ). In the above, even if the pH monitored by the first pH meter 31 is set in the range of 0.7 to 1.2 or 0.75 or more and less than 1.0, the pH monitored by the second pH meter 51 is set to 0. The same effect can be obtained regardless of whether it is set within the range of 5 to 0.7 or 0.5 to 0.6.
(比較例） (Comparative example)
上記した実施例のうち（1)〜（3)は比較例にぉ ヽても同様に行った (臭気ガス 61中 に含まれる硫化水素濃度及びアンモニア濃度も同じ。 ) o  Of the above-described examples, (1) to (3) were performed in the same manner as in the comparative example (the hydrogen sulfide concentration and the ammonia concentration contained in the odor gas 61 were the same).
(4)第 1散水管 27及び第 2散水管 47からの散水と、臭気ガス 61の装入 (圧送)と、を 連続して行ったところ、臭気ガス 61の装入 (圧送）開始からほぼ 30日で臭気ガス (処 理済） 63中の硫ィ匕水素濃度は 5ppm (気体検知管）となると共に、臭気ガス (処理済） 63中のアンモニア濃度は Oppm (気体検知管）となった。なお、第 lpH計 31が 1. 6 〜2. 0の範囲になるよう監視を継続し、この下限 1. 6未満を示す場合には第 1散水 管 27からの散水量を 2501 (250リットル) Z分に増加させ、上限 2. 0を超える場合に は第 1散水管 27からの散水量を 1501 (150リットル) Z分に減少させることで PHが 1. 6〜2. 0の範囲に収まるようした。第 2pH計 51は 1. 0〜1. 6の範囲になるよう監視を 継続し、この下限 1. 0未満を示す場合には第 2散水管 47からの散水量を 2501(250 リットル) Z分に増力！]させ、上限 1. 6を超える場合には第 2散水管 47からの散水量を 1501(150リットル） Z分に減少させることで PHが 1. 0〜1. 6の範囲に収まるようした  (4) When watering from the first sprinkling pipe 27 and the second sprinkling pipe 47 and charging (pressure feeding) of the odor gas 61 were carried out continuously, almost from the start of charging (pressure feeding) of the odor gas 61 In 30 days, the concentration of sulfur dioxide in odorous gas (treated) 63 became 5ppm (gas detector tube), and the ammonia concentration in odorous gas (treated) 63 became Oppm (gas detector tube). . Monitoring is continued so that the pH meter 31 is in the range of 1.6 to 2.0, and if the lower limit is less than 1.6, the amount of water sprayed from the first sprinkling pipe 27 is 2501 (250 liters). Increase to Z, and if the upper limit is exceeded, the PH will fall within the range of 1.6 to 2.0 by reducing the amount of water from the first sprinkler pipe 27 to 1501 (150 liters) Z. I did. The second pH meter 51 continues to be monitored within the range of 1.0 to 1.6, and if the lower limit is less than 1.0, the amount of water sprayed from the second sprinkler tube 47 is 2501 (250 liters) Z min. Boost your power! When the upper limit of 1.6 is exceeded, the amount of water sprayed from the second sprinkler pipe 47 is reduced to 1501 (150 liters) Z so that the PH falls within the range of 1.0 to 1.6.
(5)臭気ガス 61の装入 (圧送）開始からほぼ 720日経過したとき、第 1充填層 25及び 第 2充填層 45における閉塞の徴候 (具体的には、これら第 1充填層 25及び第 2充填 層 45における圧力損失が 140mmAq (水柱)程度に増大してくる。）がみられ第 1充 填層 25及び第 2充填層 45における余剰汚泥の蓄積を示すものと考えられたので、 実施例と同様に第 1散水管 27からの散水を 3001 (300リットル) Z分にそして第 2散 水管 47からの散水を 3001 (300リットル) Z分に増加させ 20分間操業した力 前述の 閉塞の徴候 (具体的には、第 1充填層 25及び第 2充填層 45における圧力損失の増 大）は解消しな力つた (第 1充填層 25及び第 2充填層 45における余剰汚泥が除去さ れな力つたものと考えられる。；)。このため操業を停止し、第 1充填層 25及び第 2充填 層 45中の微生物担持物を取り出して、高圧水にて洗浄を行った (これら微生物担持 物には余剰汚泥が多く付着していた。）後、該洗浄された微生物担持物により第 1充 填層 25及び第 2充填層 45を再び形成したところ、前述の閉塞の徴候 (第 1充填層 25 及び第 2充填層 45における圧力損失の増大）は解消した。 (5) Signs of blockage in the first packed bed 25 and the second packed bed 45 after approximately 720 days from the start of charging (pressure feeding) of the odor gas 61 (specifically, the first packed bed 25 and the first packed bed 25 2) Pressure loss in packed bed 45 increases to about 140 mmAq (water column).) It was thought that this indicates accumulation of excess sludge in the first packed bed 25 and the second packed bed 45. As in the example, the water sprayed from the first sprinkler pipe 27 was increased to 3001 (300 liters) Z and the sprinkler from the second sprinkler pipe 47 was increased to 3001 (300 liters) Z minutes. The signs (specifically, the increase in pressure loss in the first packed bed 25 and the second packed bed 45) did not disappear (the excess sludge in the first packed bed 25 and the second packed bed 45 was removed). It is thought that it was a strong force;). For this reason, the operation was stopped, and the microbial support in the first packed bed 25 and the second packed bed 45 was taken out and washed with high-pressure water (these microbial loaded A lot of excess sludge adhered to the objects. After that, when the first packed layer 25 and the second packed layer 45 are formed again by the washed microbial support, the above-mentioned signs of clogging (the pressure loss in the first packed layer 25 and the second packed layer 45 are reduced). (Increased) has been resolved.
[0033] 以上説明したように、実施例は、脱臭能力（例えば、硫ィ匕水素及びアンモニアの除 去能力）は比較例とほぼ同程度であるが、充填層（第 1充填層 25及び第 2充填層 45 )における余剰汚泥の蓄積は比較例に比して極めて少な 、。 [0033] As described above, in the examples, the deodorizing ability (for example, the ability to remove hydrogen sulfide and ammonia) is almost the same as that of the comparative example, but the packed layers (the first packed layer 25 and the first packed layer 25) 2 Surplus sludge accumulation in the packed bed 45) is very small compared to the comparative example.
これは臭気ガス 61の装入 (圧送）開始力も前述の閉塞の徴候 (第 1充填層 25及び 第 2充填層 45における圧力損失の増大）がみられるまでの期間が、実施例は 1600 日であったのに対し、比較例は 720日であったことから明白である。  This is because the odor gas 61 charging (pressing) starting force is 1600 days in the period until the above-mentioned sign of obstruction (the increase in pressure loss in the first packed bed 25 and the second packed bed 45) is observed. In contrast, the comparative example is evident from 720 days.
そして、第 1充填層 25及び第 2充填層 45における余剰汚泥の蓄積が生じても、実 施例の場合には第 1散水管 27及び第 2散水管 47からの散水を増加させることで汚 泥を洗浄除去することができた力 比較例ではそれができな力つた。このことから生じ る汚泥についても実施例のものは比較例のものより除去が容易であることがわかる（ 比較例に比して実施例はダウンタイムの減少等を図ることができる。 )。  Even if surplus sludge accumulates in the first packed bed 25 and the second packed bed 45, in the case of the practical example, the amount of water sprayed from the first sprinkling pipe 27 and the second sprinkling pipe 47 is increased. The ability to clean and remove mud The comparative example was not able to do that. From this, it can be seen that the sludge produced from the example is easier to remove than the comparative example (the example can reduce downtime compared to the comparative example).
このように充填層への散水の pHを 1. 4以下とすることで、充填層への余剰汚泥の 蓄積を防止又は減少させる（充填層洗浄工程を行う必要がな 、か又はその頻度が小 さい）と共に、たとえ充填層へ余剰汚泥が蓄積してもその蓄積した余剰汚泥は容易に 除去できる。  In this way, by setting the pH of the water spray to the packed bed to be 1.4 or less, the accumulation of excess sludge in the packed bed is prevented or reduced (the packed bed cleaning process is not required or the frequency is low). In addition, even if excess sludge accumulates in the packed bed, the accumulated excess sludge can be easily removed.
[0034] 以上の上記した実施例に示した脱臭装置 (本装置 11)は、第 1脱臭装置 21と、第 1 脱臭装置 21により脱臭された臭気ガスを受け入れ脱臭する第 2脱臭装置 41と、を含 んでいる。  [0034] The deodorization apparatus (this apparatus 11) shown in the above-described embodiment includes a first deodorization apparatus 21, a second deodorization apparatus 41 that receives and deodorizes the odor gas deodorized by the first deodorization apparatus 21, and Is included.
第 1脱臭装置 21は、微生物担持物が充填された充填層たる第 1充填層 25と、該充 填層たる第 1充填層 25に pHl. 4以下 (具体的には 0. 7〜1. 4)の水である散水を 散水する散水手段 (ここでは第 1受水槽 29と第 1導管 33と第 1ポンプ 35と第 1散水管 27とにより構成される。）と、を備えてなり、該充填層（第 1充填層 25)内に散水（下向 き）と臭気ガス（上向き）とを互 、に向流方向で流通させることで、臭気ガス 61を脱臭 する脱臭装置である。また、第 1脱臭装置 21においては、微生物担持物が充填され た充填層（第 1充填層 25)に、 pHl. 4以下の水である散水と臭気ガスとを互いに向 流方向で流通させることで、臭気ガスを脱臭する脱臭方法が行われて 、る。 The first deodorizing device 21 includes a first packed bed 25 that is a packed bed filled with a microbial support, and a pH of less than 4 (specifically, 0.7 to 1. 4) water sprinkling means for sprinkling the water sprinkling water (here, composed of the first water receiving tank 29, the first conduit 33, the first pump 35 and the first water sprinkling pipe 27). The deodorizing apparatus deodorizes the odor gas 61 by circulating water (downward) and odor gas (upward) in the packed bed (first packed bed 25) in the counter-current direction. Further, in the first deodorizing device 21, sprinkling water and odor gas, which are water of pHl. 4 or less, are directed to the packed bed (first packed bed 25) filled with the microorganism carrier. A deodorizing method for deodorizing odorous gas is carried out by circulating in the flow direction.
第 1脱臭装置 21は、さらに下記の構成 (a)及び (b)を有する処理槽 (ここでは第 1脱 臭塔 23と第 1受水槽 29とにより構成される。）を有する。（a)内部に臭気ガス及び散 水が流通する経路 (第 1脱臭塔 23の内部空間）を有し、該経路に微生物担持物が充 填された充填層 (第 1充填層 25)が配設されている。（b)該充填層 (第 1充填層 25)の 下方底部に、該充填層 (第 1充填層 25)を通過した散水を受ける受水部たる第 1受水 槽 29、該充填層（第 1充填層 25)の下方に臭気ガスを該経路に導入する供給口たる 入口 23a、及び該充填層（第 1充填層 25)の上方に臭気ガスを該経路力も排出する 排出口たる出口 23bを有する。  The first deodorization device 21 further has a treatment tank (here, composed of a first deodorization tower 23 and a first water receiving tank 29) having the following configurations (a) and (b). (A) There is a passage (inner space of the first deodorization tower 23) through which odorous gas and water spray circulate, and a packed bed (first packed bed 25) filled with microbial support material is placed in the passage. It is installed. (B) At the bottom of the packed bed (first packed bed 25), a first water receiving tank 29 serving as a water receiving section for receiving water spray that has passed through the packed bed (first packed bed 25), the packed bed (first packed bed (first packed bed 25)). 1) an inlet 23a serving as a supply port for introducing odor gas into the path below the packed bed 25), and an outlet 23b serving as a discharge port for discharging the odor gas also above the packed bed (first packed bed 25). Have.
第 1脱臭装置 21は、処理槽 (第 1脱臭塔 23と第 1受水槽 29)の受水部たる第 1受水 槽 29に受けられた水を散水として循環使用する循環使用手段 (ここでは第 1導管 33 と第 1ポンプ 35と第 1散水管 27とにより構成される。）を有する。即ち、ここでは充填層 (第 1充填層 25)を通過した散水を再び充填層（第 1充填層 25)に散水して (散水とし て)循環使用している。  The first deodorizing device 21 is a circulating use means (in this case, the water received in the first water receiving tank 29, which is the water receiving part of the treatment tank (the first deodorizing tower 23 and the first water receiving tank 29)). It consists of a first conduit 33, a first pump 35, and a first sprinkler pipe 27). That is, here, the water spray that has passed through the packed bed (first packed bed 25) is sprinkled again into the packed bed (first packed bed 25) (as a sprayed water) for circulation.
第 2脱臭装置 41は、微生物担持物が充填された充填層たる第 2充填層 45と、該充 填層たる第 2充填層 45に pHl . 4以下 (具体的には 0. 5〜0. 8)の水である散水を 散水する散水手段 (ここでは第 2受水槽 49と第 2導管 53と第 2ポンプ 55と第 2散水管 47とにより構成される。）と、を備えてなり、該充填層（第 2充填層 45)内に散水（下向 き）と臭気ガス（上向き）とを互いに向流方向で流通させることで、臭気ガスを脱臭する 脱臭装置である。また、第 2脱臭装置 41では、微生物担持物が充填された充填層（ 第 2充填層 45)に、 pHl . 4以下の水である散水と臭気ガスとを互いに向流方向で流 通させることで、臭気ガスを脱臭する脱臭方法が行われて 、る。  The second deodorizing device 41 has a second packed bed 45 which is a packed bed filled with a microbial support, and a pH of 1.4 or less (specifically 0.5 to 0. 8) water sprinkling means for sprinkling the water sprinkling water (here, composed of the second water receiving tank 49, the second conduit 53, the second pump 55, and the second water sprinkling pipe 47), The deodorizing apparatus deodorizes odorous gas by circulating water (downward) and odorous gas (upward) in the packed bed (second packed bed 45). Further, in the second deodorizing device 41, the water spray having a pH of 1.4 or less and the odor gas are allowed to flow in the countercurrent direction through the packed bed (second packed bed 45) filled with the microorganism carrier. A deodorizing method for deodorizing odorous gas is performed.
第 2脱臭装置 41は、さらに下記の構成 (a)及び (b)を有する処理槽 (ここでは第 2脱 臭塔 43と第 2受水槽 49とにより構成される。）を有する。（a)内部に臭気ガス及び散 水が流通する経路 (第 2脱臭塔 43の内部空間）を有し、該経路に微生物担持物が充 填された充填層 (第 2充填層 45)が配設されて 、る。（b)該充填層 (第 2充填層 45)の 下方底部に、該充填層（第 2充填層 45)を通過した散水を受ける受水部たる第 2受水 槽 49、該充填層（第 2充填層 45)の下方に臭気ガスを該経路に導入する供給口（第 2脱臭塔 43の下部 43cのうちダクト部 71の下端に連通する部分 43cl)、及び該充填 層（第 2充填層 45)の上方に臭気ガスを該経路力 排出する排出口たる出口 43bを 有する。 The second deodorization device 41 further has a treatment tank (here, constituted by a second deodorization tower 43 and a second water receiving tank 49) having the following configurations (a) and (b). (A) There is a passage (inner space of the second deodorization tower 43) through which odorous gas and water spray circulate, and a packed bed (second packed bed 45) filled with microbial support material is placed in the passage. It is established. (B) At the bottom of the packed bed (second packed bed 45), a second water receiving tank 49 serving as a receiving section for receiving water spray that has passed through the packed bed (second packed bed 45), the packed bed (first packed bed (second packed bed 45)). (2) The supply port (first) for introducing odorous gas into the path below the packed bed 45) (2) Of the lower part 43c of the deodorizing tower 43, there is a part 43cl) communicating with the lower end of the duct part 71, and an outlet 43b serving as an outlet for discharging the odorous gas through the packed bed (second packed bed 45). .
第 2脱臭装置 41は、処理槽 (第 2脱臭塔 43と第 2受水槽 49)の受水部たる第 2受水 槽 49に受けられた水を散水として循環使用する循環使用手段 (ここでは第 2導管 53 と第 2ポンプ 55と第 2散水管 47とにより構成される。）を有する。即ち、ここでは充填層 (第 2充填層 45)を通過した散水を再び充填層（第 2充填層 45)に散水して (散水とし て)循環使用している。  The second deodorization device 41 is a circulation use means for circulating and using the water received in the second water receiving tank 49 as the water receiving section of the treatment tank (the second deodorizing tower 43 and the second water receiving tank 49) (here, Second conduit 53, second pump 55, and second sprinkler pipe 47). That is, here, the water spray that has passed through the packed bed (second packed bed 45) is sprinkled again into the packed bed (second packed bed 45) (as water sprayed) and recycled.
本装置 11は、本装置を 2以上備えた脱臭装置 (ここでは第 1脱臭装置 21と第 2脱臭 装置 41とを備えている。）であって、 1の脱臭装置である前段脱臭装置たる第 1脱臭 装置 21で脱臭処理された臭気ガスが、後続する 1以上 (ここでは 1)の脱臭装置であ る後段脱臭装置たる第 2脱臭装置 41に連続的に供給されて脱臭処理され、かつ前 段脱臭装置 (第 1脱臭装置 21)における散水の pH (具体的には、 0. 7〜1. 4)よりも 、後段脱臭装置 (第 2脱臭装置 41)における散水の pH (具体的には、 0. 5〜0. 8)が 低い。なお、ここでは前段脱臭装置 (第 1脱臭装置 21)における散水の pHが 0. 7〜 1. 4であり、後段脱臭装置 (第 2脱臭装置 41)における散水の pHが 0. 5〜0. 8であ り、これら両者には 0. 7〜0. 8の重複範囲があるように考えられる力 0. 7〜1. 4や 0 . 5〜0. 8の範囲は時間経過に伴うある程度の変動を示しており、同時に両 pHを比 較すれば前段脱臭装置 (第 1脱臭装置 21)における散水の pHよりも、後段脱臭装置 (第 2脱臭装置 41)における散水の pHが低くなつている。また、ここでは第 1脱臭装 置 21と第 2脱臭装置 41との 2の本装置を備えている力 1のみの本装置を備えるもの であっても、また 3以上（3、 4、 5 · · の本装置を備えるものであってよいことは言うま でもない。  This device 11 is a deodorizing device (here, provided with a first deodorizing device 21 and a second deodorizing device 41) having two or more of this device, and is a first-stage deodorizing device that is the first deodorizing device. 1 Odor gas deodorized by the deodorizing device 21 is continuously supplied to the second deodorizing device 41, which is the subsequent deodorizing device 1 or more (here, 1) deodorizing device, deodorized, and before The pH of the water spray in the latter-stage deodorizer (second deodorizer 41) is more specific than the pH of the water spray in the first-stage deodorizer (first deodorizer 21) (specifically 0.7 to 1.4). 0.5 to 0.8) is low. Here, the pH of the water spray in the first-stage deodorization apparatus (first deodorization apparatus 21) is 0.7 to 1.4, and the pH of the water spray in the second-stage deodorization apparatus (second deodorization apparatus 41) is 0.5 to 0. The force that seems to have an overlap range of 0.7 to 0.8 in both of these ranges is 0.7 to 1.4 or 0.5 to 0.8. If both pH values are compared at the same time, the pH of the water spray in the latter deodorizer (second deodorizer 41) is lower than the pH of the water spray in the former deodorizer (first deodorizer 21). . Further, here, even if the first deodorizing device 21 and the second deodorizing device 41 are equipped with the two devices, only the force 1 device is used, and 3 or more (3, 4, 5, It goes without saying that this device may be provided.
本装置 11においては、微生物担持物が充填された 2以上の充填層（ここでは第 1 充填層 25と第 2充填層 45)に、 pHl. 4以下の水と臭気ガスとを互いに向流方向で 流通させる臭気ガスの脱臭方法であって、 1の充填層である前段充填層（第 1充填層 25)を通過させた臭気ガスを、後続する 1以上 (ここでは 1)の充填層である後段充填 層 (第 2充填層 45)に連続的に供給して通過させ、かつ前段充填層 (第 1充填層 25) に通過させる水の pH (0. 7〜1. 4)よりも、後段充填層（第 2充填層 45)に通過させる 水の pH (0. 5〜0. 8)を低くしている。 In this apparatus 11, water and odor gas having pHl. 4 or less are counter-currently flowed in two or more packed beds (here, the first packed bed 25 and the second packed bed 45) filled with microbial support. This is a method for deodorizing odor gas to be circulated in, and is a packed bed of 1 or more (here, 1) following the odor gas that has passed through the preceding packed bed (first packed bed 25), which is the packed bed of 1. Continuously feed and pass through the subsequent packed bed (second packed bed 45) and the previous packed bed (first packed bed 25) The pH (0.5 to 0.8) of the water passed through the latter packed bed (second packed bed 45) is made lower than the pH (0.7 to 1.4) of the water passed through the tank.
また、第 1脱臭装置 21においては、微生物担持物が充填された充填層（第 1充填 層 25)に、 pHl. 4以下の水と硫黄系臭気成分を含む臭気ガスとを互いに向流方向 で流通させ、該充填層（第 1充填層 25)から排出された酸性水を回収 (例えば、第 1 ポンプ 35の吐出液や第 1排水管 37からの排水を回収するようにしてもよい。）するェ 程を含む、硫酸を含む酸性水の製造方法が行われている。そして、この硫酸を含む 酸性水の製造方法は、前記充填層 (第 1充填層 25)から排出された酸性水を、再び 微生物担持物が充填された充填層 (第 1充填層 25)に硫黄系臭気成分を含む臭気 ガスと互いに向流方向で流通させ、該充填層（第 1充填層 25)から排出された酸性水 を回収する工程を含むものである。この硫酸を含む酸性水の製造方法は、第 1脱臭 装置 21を用いて行われている。この硫酸を含む酸性水の製造方法 (本製法）により 製造された第 1脱臭装置 21における散水 (硫酸を含む酸性水）は、硫酸の水溶液（ 硫酸の供給源）として用いることができる。  Further, in the first deodorizing device 21, water having a pH of less than 4 and odorous gas containing sulfur-based odorous components are passed in a countercurrent direction to the packed bed (first packed bed 25) filled with the microorganism carrier. The acidic water discharged from the packed bed (first packed bed 25) is collected (for example, the discharged liquid of the first pump 35 and the drainage from the first drain pipe 37 may be collected). A process for producing acidic water containing sulfuric acid is being carried out. Then, in the method for producing acidic water containing sulfuric acid, the acidic water discharged from the packed bed (first packed bed 25) is returned to the packed bed (first packed bed 25) filled with microbial support again. The method includes a step of circulating the odor gas containing the system odor component in a counter-current direction and recovering the acidic water discharged from the packed bed (first packed bed 25). This method of producing acidic water containing sulfuric acid is performed using the first deodorizing device 21. The water spray (acid water containing sulfuric acid) in the first deodorizing device 21 produced by the method for producing acidic water containing sulfuric acid (this production method) can be used as an aqueous solution of sulfuric acid (a source of sulfuric acid).
同様に、第 2脱臭装置 41においては、微生物担持物が充填された充填層（第 2充 填層 45)に、 pHl. 4以下の水と硫黄系臭気成分を含む臭気ガスとを互いに向流方 向で流通させ、該充填層 (第 2充填層 45)から排出された酸性水を回収 (例えば、第 2ポンプ 55の吐出液や第 2排水管 57からの排水を回収するようにしてもょ 、。 )する 工程を含む、硫酸を含む酸性水の製造方法が行われている。そして、この硫酸を含 む酸性水の製造方法は、前記充填層 (第 2充填層 45)から排出された酸性水を、再 び微生物担持物が充填された充填層 (第 2充填層 45)に硫黄系臭気成分を含む臭 気ガスと互いに向流方向で流通させ、該充填層（第 2充填層 45)から排出された酸性 水を回収する工程を含むものである。この硫酸を含む酸性水の製造方法は、第 2脱 臭装置 41を用いて行われている。この硫酸を含む酸性水の製造方法 (本製法）によ り製造された第 2脱臭装置 41における散水 (硫酸を含む酸性水）は、硫酸の水溶液（ 硫酸の供給源）として用いることができる。  Similarly, in the second deodorizing apparatus 41, water having a pH of less than 4 and odorous gas containing sulfur-based odorous components are counter-flowed to each other in the packed bed (second packed layer 45) filled with the microbial support. The acid water discharged from the packed bed (second packed bed 45) is collected (for example, the discharged liquid of the second pump 55 and the drainage from the second drain pipe 57 may be collected). Iii) A process for producing acidic water containing sulfuric acid is being carried out, including the step of: Then, in the method for producing acidic water containing sulfuric acid, the acidic water discharged from the packed bed (second packed bed 45) is re-filled with the packed bed (second packed bed 45) filled with the microorganism carrier. And a odor gas containing a sulfur-based odor component in a counter-current direction, and collecting acidic water discharged from the packed bed (second packed bed 45). This method for producing acid water containing sulfuric acid is performed using the second deodorization apparatus 41. The water spray (acid water containing sulfuric acid) in the second deodorizer 41 produced by the method for producing acidic water containing sulfuric acid (this production method) can be used as an aqueous solution of sulfuric acid (a source of sulfuric acid).

Claims

請求の範囲 The scope of the claims
[1] 微生物担持物が充填された充填層と、該充填層に pHl. 4以下の水を散水する散 水手段と、を備えてなり、該充填層内に散水と臭気ガスとを互いに向流方向で流通さ せることで、臭気ガスを脱臭する脱臭装置。  [1] A packed bed filled with a microorganism-carrying substance and water sprinkling means for spraying water having a pH of less than 4 in the packed bed are provided, and the sprayed water and the odorous gas are directed to each other in the packed bed. A deodorizing device that deodorizes odorous gas by circulating it in the flow direction.
[2] さらに下記の構成を有する処理槽を有する、請求項 1に記載の脱臭装置： [2] The deodorizing apparatus according to claim 1, further comprising a treatment tank having the following configuration:
内部に臭気ガス及び散水が流通する経路を有し、該経路に微生物担持物が充填 された充填層が配設されている、  It has a passage through which odorous gas and water spray circulate, and a packed bed filled with a microorganism carrier is disposed in the passage.
該充填層の下方底部に、該充填層を通過した散水を受ける受水部、  A water receiving portion that receives water spray that has passed through the packed bed at the bottom of the packed bed;
該充填層の下方に臭気ガスを該経路に導入する供給口、及び  A supply port for introducing odor gas into the path below the packed bed; and
該充填層の上方に臭気ガスを該経路力 排出する排出口を有する。  A discharge port for discharging the odor gas to the route force is provided above the packed bed.
[3] 処理槽の受水部に受けられた水を散水として循環使用する循環使用手段を有する ものである、請求項 2に記載の脱臭装置。 [3] The deodorizing apparatus according to claim 2, further comprising a circulation use means for circulating and using water received in the water receiving portion of the treatment tank as water spray.
[4] 請求項 1乃至 3のいずれか 1に記載の脱臭装置を 2以上備えた脱臭装置であって、 1の脱臭装置である前段脱臭装置で脱臭処理された臭気ガスが、後続する 1以上の 脱臭装置である後段脱臭装置に連続的に供給されて脱臭処理され、かつ [4] A deodorizing device comprising two or more deodorizing devices according to any one of claims 1 to 3, wherein the odor gas deodorized by the first-stage deodorizing device which is the deodorizing device is followed by one or more The deodorizing device is continuously supplied to the latter deodorizing device and deodorized, and
前段脱臭装置における散水の pHよりも、後段脱臭装置における散水の pHが低い ものである、脱臭装置。  A deodorizing apparatus in which the pH of the water spray in the latter-stage deodorization apparatus is lower than the pH of the water spray in the first-stage deodorization apparatus.
[5] 微生物担持物が充填された充填層に、 pHl. 4以下の水と臭気ガスとを互いに向 流方向で流通させることで、臭気ガスを脱臭する脱臭方法。  [5] A deodorizing method for deodorizing odorous gas by allowing water and odorous gas of pHl. 4 or less to flow in a counter-current direction through a packed bed filled with a microorganism carrier.
[6] 微生物担持物が充填された 2以上の充填層に、 pHl. 4以下の水と臭気ガスとを互 いに向流方向で流通させる臭気ガスの脱臭方法であって、 [6] A method for deodorizing odorous gas in which water and odorous gas having pHl. 4 or less are circulated in a counter-current direction in two or more packed beds filled with a microorganism-supported substance,
1の充填層である前段充填層を通過させた臭気ガスを、後続する 1以上の充填層で ある後段充填層に連続的に供給して通過させ、かつ  The odorous gas that has passed through the first packed bed, which is the first packed bed, is continuously supplied to and passed through the subsequent packed bed, which is the one or more packed beds, and
前段充填層に通過させる水の pHよりも、後段充填層に通過させる水の pHを低くす ることを特徴とする、脱臭方法。  A deodorizing method characterized by lowering the pH of water that passes through a preceding packed bed to be lower than the pH of water that passes through a preceding packed bed.
[7] 充填層を通過した散水を再び充填層に散水して循環使用するものである、請求項[7] The water spray that has passed through the packed bed is sprinkled into the packed bed again and circulated for use.
5又は 6に記載の脱臭方法。 The deodorizing method according to 5 or 6.
[8] 微生物担持物が充填された充填層に、 pHl. 4以下の水と硫黄系臭気成分を含む 臭気ガスとを互いに向流方向で流通させ、該充填層から排出された酸性水を回収す る工程を含む、硫酸を含む酸性水の製造方法。 [8] The packed bed filled with microbial support contains water with pHl. 4 or less and sulfur-based odor components. A method for producing acidic water containing sulfuric acid, comprising a step of allowing odorous gas to circulate in a counterflow direction and recovering acidic water discharged from the packed bed.
[9] 前記充填層から排出された酸性水を、再び微生物担持物が充填された充填層に 硫黄系臭気成分を含む臭気ガスと互いに向流方向で流通させ、該充填層から排出 された酸性水を回収する工程を含む、請求項 8に記載の製造方法。  [9] The acidic water discharged from the packed bed is circulated in a countercurrent direction with the odor gas containing the sulfur-based odor component again in the packed bed filled with the microorganism-supported substance, and the acidic water discharged from the packed bed 9. The production method according to claim 8, comprising a step of recovering water.
[10] 前記工程を請求項 1乃至 4のいずれか 1に記載の脱臭装置を用いて行う、請求項 8 又は 9に記載の製造方法。  [10] The production method according to claim 8 or 9, wherein the step is performed using the deodorizing apparatus according to any one of claims 1 to 4.
[11] 請求項 8乃至 10のいずれか 1に記載の製造方法によって得られた、硫酸を含む酸 性水。  [11] Acidic water containing sulfuric acid obtained by the production method according to any one of claims 8 to 10.
PCT/JP2006/316267 2005-08-23 2006-08-18 Deodorization apparatus and deodorization method WO2007023749A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007532089A JPWO2007023749A1 (en) 2005-08-23 2006-08-18 Deodorizing device and deodorizing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-241193 2005-08-23
JP2005241193 2005-08-23

Publications (1)

Publication Number Publication Date
WO2007023749A1 true WO2007023749A1 (en) 2007-03-01

Family

ID=37771497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/316267 WO2007023749A1 (en) 2005-08-23 2006-08-18 Deodorization apparatus and deodorization method

Country Status (2)

Country Link
JP (1) JPWO2007023749A1 (en)
WO (1) WO2007023749A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007135657A (en) * 2005-11-15 2007-06-07 Kuraray Living Kk Strong acid water-impregnated material with deodorization performance
JP2007135860A (en) * 2005-11-18 2007-06-07 Kuraray Living Kk Deodorant
CN104645823A (en) * 2014-11-21 2015-05-27 益信环境科技（上海）有限公司 Biological deodorization device
CN108361723A (en) * 2018-05-03 2018-08-03 连福龙 A kind of industrial waste-gas purifier and operating method
CN109569267A (en) * 2018-12-20 2019-04-05 自贡佳鑫农业科技有限公司 A kind of aerobic fermentation waste bio-treatment method
CN110523243A (en) * 2019-07-24 2019-12-03 北京工业大学 A kind of Optimal Operation Strategies based on real-time control and the device and method for preventing sewage treatment plant's deodoration system from collapsing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05115742A (en) * 1991-09-18 1993-05-14 Nippon Gesuidou Jigyodan Biological deodorizing apparatus
JPH08192023A (en) * 1995-01-18 1996-07-30 Mitsubishi Kakoki Kaisha Ltd Biological deodorizing device
JP2000042354A (en) * 1998-08-03 2000-02-15 Ebara Corp Deodorizing method of malodorous gas
JP2001232142A (en) * 2000-02-21 2001-08-28 Ebara Corp Biological deodorizing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3476293B2 (en) * 1995-12-13 2003-12-10 株式会社荏原製作所 Odor gas deodorizing method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05115742A (en) * 1991-09-18 1993-05-14 Nippon Gesuidou Jigyodan Biological deodorizing apparatus
JPH08192023A (en) * 1995-01-18 1996-07-30 Mitsubishi Kakoki Kaisha Ltd Biological deodorizing device
JP2000042354A (en) * 1998-08-03 2000-02-15 Ebara Corp Deodorizing method of malodorous gas
JP2001232142A (en) * 2000-02-21 2001-08-28 Ebara Corp Biological deodorizing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007135657A (en) * 2005-11-15 2007-06-07 Kuraray Living Kk Strong acid water-impregnated material with deodorization performance
JP2007135860A (en) * 2005-11-18 2007-06-07 Kuraray Living Kk Deodorant
CN104645823A (en) * 2014-11-21 2015-05-27 益信环境科技（上海）有限公司 Biological deodorization device
CN108361723A (en) * 2018-05-03 2018-08-03 连福龙 A kind of industrial waste-gas purifier and operating method
CN109569267A (en) * 2018-12-20 2019-04-05 自贡佳鑫农业科技有限公司 A kind of aerobic fermentation waste bio-treatment method
CN110523243A (en) * 2019-07-24 2019-12-03 北京工业大学 A kind of Optimal Operation Strategies based on real-time control and the device and method for preventing sewage treatment plant's deodoration system from collapsing

Also Published As

Publication number Publication date
JPWO2007023749A1 (en) 2009-02-26

Similar Documents

Publication Publication Date Title
KR101720749B1 (en) The device for deodorizing polluted air
KR100989563B1 (en) Deodorizing tower and method of deodorization
WO2007023749A1 (en) Deodorization apparatus and deodorization method
KR20180005439A (en) 3-Stage Chemical Wet Scrubber
JP2012193252A (en) Biodesulfurization device of biogas and cleaning method of the same
KR100717430B1 (en) A high efficiency multi-water sprinkle type dust collector
KR102047210B1 (en) Complex deodorizer
KR101954358B1 (en) Integrated Odor Removal System
KR100686937B1 (en) Bio deodorization apparatus with rotary high pressure water injection means
JP2008036513A (en) Unit and system for gas treatment
KR101823139B1 (en) Tunnel type ozone water odor remving facilities
KR101566643B1 (en) Foul odor eliminating device
JP2691517B2 (en) Biological deodorizer
KR102282157B1 (en) Treatment Apparatus And Method For Offensive Odor Of Cattle Shed
KR102221037B1 (en) Deodorizer for cleaning odor-causing components in odor gas
JP2008238118A (en) Pretreatment unit of organism deodorization plant
KR102416308B1 (en) Deodorizing device
KR101023736B1 (en) Hibrid biotrickling filter device combined with micro air bubble absorber and method thereof
CN207401342U (en) Deodoration system
US20050274256A1 (en) Hydrogen sulfide scrubber using polymeric amine and associated methods
KR200425371Y1 (en) A high efficiency multi-water sprinkle type dust collector
JP2001219027A (en) Method and device for biogically treating exhasut
KR20150055684A (en) Apparatus and method for treating hardly degradable malodorous gas
KR101576125B1 (en) Hybrid Bad Smell Decreasing Equipment
KR102314552B1 (en) Complex deodorizing system based on IoT

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2007532089

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06782826

Country of ref document: EP

Kind code of ref document: A1