CN108273380A - Growth-promoting flora and waste gas processing method for improving exhaust treatment efficiency - Google Patents
Growth-promoting flora and waste gas processing method for improving exhaust treatment efficiency Download PDFInfo
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- CN108273380A CN108273380A CN201810151504.1A CN201810151504A CN108273380A CN 108273380 A CN108273380 A CN 108273380A CN 201810151504 A CN201810151504 A CN 201810151504A CN 108273380 A CN108273380 A CN 108273380A
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- 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
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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Abstract
The present invention relates to waste gas purification fields, and in particular to growth-promoting flora and waste gas processing method for improving exhaust treatment efficiency.It is 0.9 1.1 provided by the present invention for improving the growth-promoting flora of exhaust treatment efficiency, including mass ratio：0.8‑1.0：0.9‑1.1：2.7 3.5 Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus.The growth-promoting flora does not participate in contaminant degradation directly, but it can promote directly to participate in the growth and breeding of the target flora mixture of contaminant degradation, so that target flora mixture is maintained in higher level the metabolic capability of pollutant always, 99.8% or more is up to the treatment effeciency of industrial waste gas.
Description
Technical field
The present invention relates to waste gas purification fields, and in particular at the growth-promoting flora and exhaust gas for improving exhaust treatment efficiency
Reason method.
Background technology
In recent years, environmental problem gets more and more people's extensive concerning, and the harm of organic exhaust gas has become current common recognition, administers
Organic Waste Gas Pollution is one of emphasis of efforts at environmental protection.Organic exhaust gas is that petrochemical industry, rubber, plastics, coating, printing etc. are numerous
Generated exhaust gas in industry production process, containing toxic pollutant substance, is greatly its main feature is that quantity is larger
Volatile organic matter (VOCs), content of organics fluctuation is big, has combustibility, distributes stench and to human health.
Currently, there are two main classes for the administering method of organic exhaust gas：One kind is absorption method, by physical method, certain
Under temperature and pressure, with the method for selective absorbent and permoselective membrane etc. come separation of VOCs, mainly
Active carbon adsorption, condensation method, pressure swing adsorption method and biofilm etc..Another kind of is null method, anti-by chemistry or biology
It answers, using light, heat, catalyst and microorganism etc., organic matter is converted to carbon dioxide and water, include mainly light decomposition method, heat
Oxidizing process, catalysis burning, bioanalysis, corona method, plasma decomposition etc..Wherein bioanalysis is that recent decades grow up
A kind of new waste gas pollution control and treatment technology, maximum feature is that operating cost is low, and non-secondary pollution being capable of efficient process low concentration strong wind
The pollution sources of amount.Its principle is that odorant is decomposed into carbon dioxide and water or other using the microorganism after domestication
Easy regenerant, achievees the purpose that air purification.Pollutant is changed into certainly by microorganism during oxygenolysis polluter
Body nutrients, is constantly bred.
The technique of Biochemical method exhaust gas mainly include three kinds of zinc cation method, biofiltration process and biological island,
Middle biological island is a kind of energy-efficient waste gas treatment process, and quickly, engineer application number was in recent years for development speed
Increase year by year.Bio-trickling device is generally made of spraying layer, packing layer, reservoir bed, bacterium solution tank, water pump, ventilation equipment.Pollution
Gas is sent into packing layer by air blower, and the poisonous and harmful component in air-flow is absorbed by the moisture film on packing layer, and is transmitted to and is filled out
The biomembrane adhered on the bed of material, finally by the microorganism decomposition in biomembrane.
Existing bio-trickling device takes up a large area, only preferable to the clean-up effect of low concentration gas, only up to locate
The exhaust gas that entrance concentration is 183ppm is managed, and qualified standard is can only achieve in the gas of exit discharge, can be used for municipal administration
The processing of exhaust gas, but for the industrial waste gas of high concentration, existing bioanalysis are not met by exhaust gas largely processing and green
The demand that colour circle is protected.In the decade-long time, researchers attempt micro- to improve by the DNA structure for changing desulfurization bacterium
Biological exhaust treatment efficiency, however its result is all unsatisfactory, the change of desulfurization bacterium gene structure can not effectively improve bacterium
The exhaust-gas treatment ability of group.Therefore, it is necessary to further develop the bioanalysis for capableing of efficient process high-concentration waste gas, passed through in development
While Ji, preserves the ecological environment and be not damaged.
Invention content
In order to solve the problems, such as that existing bioanalysis exhaust treatment efficiency is low, degree of purification is not high enough, the present invention is provided to
Improve exhaust treatment efficiency growth-promoting flora, bacteria bed and waste gas processing method, can realize high-concentration waste gas without dirt
Dye, low cost, high efficiency processing.
The claimed technical solution of the present invention is as follows：
Growth-promoting flora for improving exhaust treatment efficiency, which is characterized in that including mass ratio be 0.9-1.1：0.8-
1.0：0.9-1.1：Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and the colloid bacillus cereus of 2.7-3.5.
Preferably, the mass ratio of the Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus is 1：1：1：3.
A kind of bacteria bed for exhaust-gas treatment, which is characterized in that the microorganism adhered to comprising filler and filler surface
Film, the microbial film are after being mixed with the growth-promoting flora for improving exhaust treatment efficiency by target flora mixture
Manufactured bacterium solution is formed on filler surface by bio-film colonization；
The target flora mixture refers to the flora mixture for handling exhaust gas.
Preferably, the mass ratio of the target flora mixture and the growth-promoting flora is 7-8：1-1.5.
Preferably, the filler is by being 0.7-1.3 comprising volume ratio：0.7-1.3：Volcanic rock particle, the wooden unit of 0.4-0.6
It is made with the raw material of raw shell.
Preferably, the preparation method of the volcanic rock particle includes：Pickling is carried out in weak acid solution, then is washed with clear water
Only, natural air drying；Then alkali cleaning is carried out in weak caustic solution, then is cleaned with clear water, natural air drying；It is finally stifling with high steam
Volcanic rock removes the salts substances of volcanic rock remained on surface, the volcanic rock particle that screening grain size is 10~20mm；
The preparation method of the wooden unit includes：Machinery is carried out to wooden unit to smash, and is chosen the wooden unit that grain size is 8~16cm, is used
High pressure rushes rifle impact, improves structure porosity to 60-75%；
The preparation method of the raw shell includes：Raw shell is cleaned with clear water, is smashed after drying, selection grain size is 5~8cm
Life shell；
The volcanic rock particle prepared, wooden unit and raw shell are obtained into filler after mixing.
Preferably, in the preparation method of the volcanic rock particle, the weak acid is the nitric acid or sulfuric acid solution of pH4-6, acid
It is 3-5 minutes to wash the time；The weak base is the sodium hydroxide or potassium hydroxide solution of pH8-10, and the alkali cleaning time is 3-5 minutes；Institute
It states stifling refer to of high steam and fumigates volcanic rock in the steam of 5M-10M pas 2-3 minutes；
In the preparation method of the wooden unit, the high pressure is rushed described in the hydraulic pressure impact that rifle impact refers to using 350M-400M pas
Wooden unit 5-10 seconds.
A kind of emission-control equipment, which is characterized in that include any bacteria bed for exhaust-gas treatment.
The growth-promoting flora for being used to improve exhaust treatment efficiency or any biological filter for exhaust-gas treatment
The application of bed or the emission-control equipment in exhaust-gas treatment.
A kind of waste gas processing method, which is characterized in that using any described bacteria bed or institute for exhaust-gas treatment
The emission-control equipment stated carries out exhaust-gas treatment.
Preferably, the exhaust gas includes benzene, toluene, ethylbenzene, hydrogen sulfide, carbon disulfide and/or ammonia.
Inventor chances on the flora that some do not participate in contaminant degradation directly under study for action can promote directly to participate in
The growth and breeding of the flora of contaminant degradation, to improve the degradation efficiency of exhaust emission, these do not participate in pollution directly
The flora of object degradation is referred to as growth-promoting flora.By further bacterial screening, obtaining can significantly improve at exhaust gas biology
The growth-promoting flora for managing efficiency is 0.9-1.1 it includes mass ratio：0.8-1.0：0.9-1.1：Bifidobacterium Bifidum, the lactic acid of 2.7-3.5
Bacterium, actinomyces and colloid bacillus cereus.
Provided by the present invention for the bacteria bed of exhaust-gas treatment, by target flora mixture and growth-promoting provided by the invention
Bacterium solution is made after flora mixing, stable biomembrane is formed on filler surface by the method for bio-film colonization, for continuous, high
Effect steadily handles exhaust gas.The target flora mixture be refer to degradation exhaust gas in pollutant (for example, benzene, toluene, second
Benzene, hydrogen sulfide, carbon disulfide and/or ammonia) flora mixture.The present invention does not have special want to the target flora mixture
It asks, those skilled in the art can screen from associated sample according to conventional bacterial screening method and obtain, for example, acquisition chemical industry
The neighbouring humus soil sample of factory, the flora mixture for the volatile organic compounds that obtains capable of degrading through laboratory separation screening.
The mass ratio of the target flora mixture and growth-promoting flora is preferably 7-8：1-1.5.Growth-promoting flora and object bacteria
The one-way or bi-directional promotion growth of group's mixture, enhances the activity of target flora mixture, improves target flora mixture
Proliferative speed makes the rate of contaminant degradation under identical contact area improve 5~10 times, can handle entrance concentration and be up to
12000-15000mg/m3Exhaust gas, treatment effeciency is up to 99% or more (treatment effeciency=(entrance detected value-dirt of pollutant
Contaminate object outlet detected value)/pollutant entrance detected value).Bacteria bed using the present invention carries out exhaust-gas treatment, substantially
Without additional Additional nutrient solution, high temperature resistant and soda acid can handle multiple pollutant simultaneously, convert pollutant to solid phase, nothing
Secondary pollution.
In a preferred embodiment, after the target flora mixture is mixed with growth-promoting flora, by domestication in about 30 days
Culture, makes flora adapt to the living environment of pure sewage completely, is then formulated for the bacterium solution of bio-film colonization.Bacterium solution is sprayed repeatedly
On filler, filler surface is made to adhere to uniform biomembrane.From domestication culture to bio-film colonization, whole process only needs 35-40 days,
It can be obtained the biomembrane of high activity.Preferably, in taming incubation, control culture medium dissolved oxygen concentration be 0.3~
0.8mg/L, pH are 4~8, and the strain of higher tolerance is possessed with culture.In the bacterium solution for being formulated for bio-film colonization, control training
0.4~0.5mg/L of dissolved oxygen concentration of base is supported, pH value is 6.5~7.5, and optimal culture conditions are provided for culture propagation.
The affinity of active biological film and exhaust gas in the bacteria bed of the present invention is strong, and exhaust gas is upward from bacteria bed bottom
During bacteria bed, the pollutant in exhaust gas can be by the biomembrane efficient absorption on filler surface and degradation, at this
Absorption efficiency of the biomembrane to pollutant need not be improved using a large amount of water dissolution industrial waste gas during a, need to only made a living
The required moisture of object film sprinkling life, has not only saved water resource, has also reduced energy consumption.
The bacteria bed of the present invention can use commercially available filler or homemade filler.Inventor sends out by long-term research
Existing, filler can improve exhaust treatment efficiency, the volcano made of the raw material comprising volcanic rock particle, wooden unit with raw shell
The volume ratio of rock particle, wooden unit and raw shell is 0.7-1.3：0.7-1.3：0.4-0.6.The porosity of volcanic rock is high, specific surface
Product is big, can increase the contact area of exhaust gas and biomembrane；Its flourishing hole makes to form anaerobic environment inside filtrate, makes anaerobism
Flora can also keep more strongly active, while handle multiple pollutant；Compared with common filler haydite, volcanic rock is also used as
Microbial activity is improved in the micro- source of biomembrane.Wooden unit provides carbon source, preferably pine wooden unit for biomembrane.Raw shellfish
Shell is rich in calcium carbonate, biofilm carrier and the alkalinity source of nitration reaction is can not only be used for, to biology in waste gas treatment process
The pH of film is finely adjusted, and pH is made to maintain 6.5~7.5 always, and target flora mixture and growth-promoting flora is made to remain height
Activity.
In a preferred embodiment, volcanic rock is activated through overpickling, alkali cleaning, high temperature and high pressure sequential processes inside volcanic rock
Ingredient improves its intensity, prevents from occurring the phenomenon that volcanic rock crushing during use and influencing exhaust-gas treatment effect.Pickling can be with
Using mono-acid or Compound-acid, the weak acid for pickling is preferably sulfuric acid, can also be nitric acid.Weak base for alkali cleaning is preferably hydrogen
Potassium oxide can also be sodium hydroxide.Wooden unit rushes rifle impact by high pressure, improves porosity, increases specific surface area.By processing
Filling intensity it is high, strong shock resistance, high temperature high voltage resistant, acid and alkali-resistance, porosity is high, and large specific surface area improves at exhaust gas
Manage efficiency.
Waste gas processing method provided by the invention, using any described bacteria bed for exhaust-gas treatment or described useless
Flash Gas Compression Skid System carries out exhaust-gas treatment.In waste gas treatment process, by exhaust gas adjusting to saturated humidity, temperature is adjusted to 15~35
℃；Make exhaust gas from bacteria bed bottom upwardly through bacteria bed, the pollutant in exhaust gas is attached to biological form membrane to be filled out
Expect that the flora on surface is absorbed and decomposed, be converted into harmless substance, in this process, continues to spray tap water to bacteria bed
Or middle water, provide life required moisture content for biomembrane；Purified gas is finally discharged.
To sum up, waste gas processing method of the invention has the following advantages compared with existing bioanalysis：(1) treatment effeciency
It is high：99.8% or more is up to the treatment effeciency of industrial waste gas；(2) stability is strong：Growth-promoting flora promotes target flora mixture
Growth and breeding, so that target flora mixture is maintained in higher level the metabolic capability of pollutant always, exhaust-gas treatment
Efficiency will not be reduced rapidly because the time elapses；(3) low energy consumption：Without largely using water dissolution industrial waste gas, energy consumption is reduced.
Description of the drawings
The structural schematic diagram of Fig. 1 emission-control equipments；
Wherein, 1- bacteria beds region case, 2- bacteria beds, 3- gas collection pipelines, 4- biological treating equipment casees, 5- are pre-
Processing region, 6- humidify spray equipment, 7- exhaust tubes.
Specific implementation mode
The present invention is described in further detail below in conjunction with specific embodiment, it is to be understood that following embodiments are only
As explanation and illustration of the invention and explanation, do not limit the scope of the invention.
Biomaterial
Bifidobacterium Bifidum：It buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC106791；
Lactic acid bacteria：It buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC106785；
Actinomyces：It buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC336944；
Colloid bacillus cereus：It buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC335819.
This laboratory of above-mentioned strain also has preservation, applicant's statement that can freely be sent out to the public in 20 years from the applying date
It puts and is used for necessary confirmatory experiment.It should be understood that the realization of the present invention is not rely on representated by above-mentioned bacterial strains number
Strain, Bifidobacterium Bifidum, lactic acid bacteria and actinomyces can select one or more other strains of same Pseudomonas to be replaced, colloid
Bacillus can select other bacterial strains of same strain to be replaced, and bacterial strain is not used in the guarantor of the limitation present invention provided herein
Protect range.
Consumptive material
Volcanic rock：Pick up from Tengchong In Yunnan Province；
Wooden unit：Pick up from the pine of Changbai mountain, Jilin；
Raw shell：Pick up from East Sea coastal area；
Haydite：It buys from Yongzhou City, Hunan Province Xiang Yue haydites factory.
In following embodiment, not specified biological chemical reagent is this field conventional reagent, can be according to this field
Conventional method prepare and or it is commercially available, specification be the pure grade in laboratory；Not specified consumptive material is that this field is normal
Consumptive material is advised, finished product can be bought in shop or commission manufacturer is customized.
The preparation of 1. growth-promoting flora of embodiment
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus are uniformly mixed according to following mass ratio, obtain growth-promoting
Flora.
No. 1 growth-promoting flora：
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 1：1：1：3.
No. 2 growth-promoting floras：
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 1.1：0.8：1.1：2.7.
No. 3 growth-promoting floras：
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 0.9：1.0：0.9：3.5.
2. growth-promoting flora of embodiment improves the compliance test result of exhaust treatment efficiency
1. prepared by the flora for exhaust-gas treatment
(1) target flora mixture is screened
A. certain chemical plant humus soil sample 10g nearby is acquired, it is mixed with the sterile trade effluent of factory 100ml pH4-7
It is even, it is taken out after 30-45 DEG C, 150r/min shake cultures 48h.
B. 10ml culture solutions are drawn in superclean bench to be inoculated in 90ml fresh sterile trade effluents, at 30-45 DEG C,
It is taken out after 150r/min shake cultures 48h.Repeat aforesaid operations three times, the microorganism of enrichment degradation volatile organic compounds.
D. the bacterium solution 1ml after enrichment is drawn with Sterile pipette, be put into the test tube for filling 9ml sterile waters, concussion is uniform
Afterwards, bacterium solution and other 9ml sterile waters mixed diluting after wherein taking 1ml dilutions, are so repeated as many times, bacterium solution are diluted to 10-1,
10-2, 10-3, 10-4, 10-5, 10-6The dilution of gradient concentration.Take 10-4, 10-5, 10-6Each 0.2ml of dilution of three concentration,
It is respectively coated on the agar plate made of sterile trade effluent, after placing 2h at room temperature, 30-45 DEG C is inverted culture.48-
Occurs circular protrusions shape petite (diameter 1mm or so) after 72h, on plating medium.Single bacterium colony is provoked with toothpick, is inoculated into
In test tube equipped with the sterile trade effluents of 10ml, gauze sealing culture, until liquid becomes milky turbidity bacterium solution in test tube.Weight
The multiple above operation three times, through isolating and purifying repeatedly, obtains target flora mixture.
The realization of the present invention is not rely on the target flora mixture screened by the above method, art technology
The flora for the exhaust emission that can degrade that personnel obtain according to screening technique known in the art is suitable for the present invention.
(2) the target flora mixture that screening obtains and the growth-promoting flora that embodiment 1 is prepared are mixed according to following mass ratio
It closes, obtains the flora for exhaust-gas treatment：
No. 1 processing flora：By target flora mixture and No. 1 growth-promoting flora according to 8：1 mass ratio mixing；
No. 2 processing floras：By target flora mixture and No. 1 growth-promoting flora according to 7：1.5 mass ratio mixing；
No. 3 processing floras：By target flora mixture and No. 2 growth-promoting floras according to 8：1 mass ratio mixing；
No. 4 processing floras：By target flora mixture and No. 2 growth-promoting floras according to 7：1.5 mass ratio mixing；
No. 5 processing floras：By target flora mixture and No. 3 growth-promoting floras according to 8：1 mass ratio mixing；
No. 6 processing floras：By target flora mixture and No. 3 growth-promoting floras according to 7：1.5 mass ratio mixing；
No. 7 processing floras：Only include target flora mixture, as a control group flora.
2. domestication culture
(1) prepare culture medium
Prepare nutrient solution：Including the substance that mass volume ratio is following：3% starch, 3% glucose, 1% peptone, 0.1%
Magnesium sulfate, 0.1% calcium carbonate, 0.05% potassium dihydrogen phosphate and 0.01 ‰ Zn2+/Mn2+/Cu2+.The nutrient solution disclosure satisfy that mesh
Mark the nutriment needed for flora mixture and growth-promoting flora growth and breeding.
No. 1 culture medium：5 are pressed by nutrient solution and chemical plant sewage：1 volume ratio mixing；
No. 2 culture mediums：4 are pressed by nutrient solution and chemical plant sewage：1 volume ratio mixing；
No. 3 culture mediums：3 are pressed by nutrient solution and chemical plant sewage：1 volume ratio mixing；
No. 4 culture mediums：2 are pressed by nutrient solution and chemical plant sewage：1 volume ratio mixing；
No. 5 culture mediums：1 is pressed by nutrient solution and chemical plant sewage：1 volume ratio mixing；
No. 6 culture mediums：Chemical plant sewage.
By prepared culture medium in 121 DEG C of high-temperature sterilization 15min, it is cooled to room temperature.
(2) domestication culture is carried out respectively to 1~No. 7 processing flora prepared by step 1, steps are as follows：
Flora is inoculated into No. 1 culture medium, is passed through oxygen, control the dissolved oxygen concentration of No. 1 culture medium 0.3~
0.8mg/L, pH are 4~8, and temperature is 20~35 DEG C, uses low-speed agitator stir culture base, rotating speed 30r/min.Check bacterium
Group's growing state, after flora growth stabilization (OD600 is 0.4~0.6), according to 1:Bacterium solution is inoculated into No. 2 by 10 volume ratio
In culture medium, condition of culture is identical as when being cultivated in No. 1 culture medium.Repeat aforesaid operations, successively use No. 3 culture mediums, No. 4
Culture medium, No. 5 culture mediums, No. 6 culture mediums carry out domestication culture to flora, and the incubation time in each culture medium is no less than 2
It.By gradually increasing concentration of wastewater, reduces nutrition liquid proportional, sewage is finally made to become the unique nutrient source of flora.It is entire to tame and docile
Change process needs 30d or so.
3. prepared by bacterium solution
The bacterium solution for bio-film colonization is prepared respectively using 1~No. 7 processing flora for completing domestication in step 2, and step is such as
Under：
Using trade effluent and a small amount of glucose, swill mixing as culture medium, wherein trade effluent accounts for culture volume
70%.Prepared culture medium completes the flora of domestication in 121 DEG C of high-temperature sterilization 15min postcoolings to room temperature, inoculation.Control
The dissolved oxygen concentration of culture medium is 0.4~0.5mg/L, and pH is 6.5~7.5, and temperature is 20~35 DEG C, is stirred using low-speed agitator
Mix culture medium, rotating speed 30r/min.It is cultivated by 5~7d, bacterium solution is in faint yellow half thick liquid, that is, is prepared successfully.
1~No. 7 bacterium solution is obtained, corresponds to 1~No. 7 processing flora respectively.
4. bio-film colonization
(1) using volcanic rock, wooden unit and raw shell as raw material, filler is made as follows：
The processing of volcanic rock：Pickling 3-5 minutes in the sulfuric acid solution of pH4-6, then clean, the natural air drying with clear water；So
Afterwards alkali cleaning 3-5 minutes in the potassium hydroxide solution of pH8-10, then clean, the natural air drying with clear water；Finally in 5M-10M pas
Volcanic rock being fumigated in high steam 2-3 minutes, removing the salts substances of volcanic rock remained on surface, screening grain size is 10~20mm's
Volcanic rock particle.
The processing of wooden unit：Machinery is carried out to wooden unit to smash, is sieved after smashing, and selection grain size is 8-16cm, thickness 3-5cm
Wooden unit.Then it rushes rifle impact wooden unit 5-10 seconds with the high pressure of 350M-400M pas, improves structure porosity to 60-75%.
The processing of raw shell：Raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that grain size is 5-8cm
Shell.
Volcanic rock particle, wooden unit and the raw shell that processing is obtained are according to 0.7-1.3：0.7-1.3：The volume of 0.4-0.6
Than being uniformly mixed, filler is obtained.
(2) filler obtained is respectively charged into 7 bacteria bed region casees, without compressing, is uniformly mixed.It is packed into
The determination method of packing volume in the case of bacteria bed region：Packing volume is Am3, exhausted air quantity Bm3/ s (must be by m3/ h is changed
It is m to calculate3/ s), A/B=C, it is necessary to meet 20s≤C≤30s.1~No. 7 bacterium solution is respectively adopted and prepares bacteria bed, steps are as follows：
It is sprayed at bacterium solution iterative cycles and uniformly on the filler being previously charged into the case of bacteria bed region by water pump, by 5~7 days
Debugging, so that filler surface is adhered to uniform active biological film.1~No. 7 bacteria bed is obtained, corresponds to 1~No. 7 processing bacterium respectively
Group.
5. the detection of exhaust treatment efficiency
Pending exhaust gas is handled with emission-control equipment shown in FIG. 1.
The emission-control equipment includes gas collection pipeline 3 and biological treating equipment case 4；The biological treating equipment case
4 include the bacteria bed region case 1 that bacteria bed 2 is housed for the pretreated pretreatment zone 5 of exhaust gas and bottom；It is described
Gas collection pipeline 3 is in fluid communication with the pretreatment zone 5, the pretreatment zone 5 and bacteria bed region case 1
Bottom is in fluid communication；The side wall of the pretreatment zone 5 is equipped with humidification spray equipment 6, will for spraying tap water or middle water
Exhaust gas is adjusted to saturated humidity；The top of bacteria bed region case 1 is equipped with humidification spray equipment 6, is used for bacteria bed 2
Tap water or middle water are sprayed, provides life required moisture for biomembrane；The top of bacteria bed region case 1 is equipped with exhaust tube
7, pass through 2 purified gas of bacteria bed for being discharged.
1~No. 7 bacteria bed obtained with step 4 is respectively handled same a collection of industrial waste gas.Included in exhaust gas
Major pollutants and its a concentration of hydrogen sulfide 468.31mg/m3, ammonia 13.25mg/m3, volatile organic gases (VOC)
2576.82mg/m3, exhausted air quantity 15000m3/h。
Steps are as follows：
Pending exhaust gas enters pretreatment zone 5 by gas collection pipeline 3, will using gas-liquid misphase exchange way
Gas regulation is to saturated humidity, and after temperature is adjusted to 15~35 DEG C, exhaust gas enters from 2 bottom of bacteria bed, upwardly through biology
Filter bed 2.The top of bacteria bed region case 1 is equipped with humidification spray equipment 6, and with the rate of 4L/d, the frequency of 1min/h is to biology
Filter bed 2 sprays tap water or middle water.Purified gas is discharged through exhaust tube 7, the pollutant concentration in detection exhaust tube exit.
The results are shown in Table 1, and the exhaust-gas treatment effect of No. 1 bacteria bed made from No. 1 processing flora is best, to exhaust gas
The purification efficiency of middle pollutant is up to 99.8% or more, than the purification of No. 7 processing floras (control group) without containing growth-promoting flora
Efficient about 5%.
Clean-up effect of 1.1~No. 7 processing floras of table to exhaust gas
Influence of 3. filler of embodiment to exhaust treatment efficiency
1. preparing filler
Using volcanic rock, wooden unit and raw shell as raw material, filler is made as follows.
No. 1 filler
The processing of volcanic rock：Pickling 3 minutes in the salpeter solution of pH6 are cleaned, natural air drying with clear water；Then in pH8
Sodium hydroxide solution in alkali cleaning 3 minutes, then cleaned with clear water, natural air drying；Fire is finally fumigated in the high steam of 5M pas
Mountain rock 2 minutes removes the salts substances of volcanic rock remained on surface, the volcanic rock particle that screening grain size is 10~20mm, porosity
It is 50%.
The processing of wooden unit：Machinery is carried out to wooden unit to smash and (regular can not cut), is sieved after smashing, and selection grain size is 8-
16cm, thickness are the wooden unit of 3-5cm.Then rifle is rushed using high pressure, wooden unit is impacted 5 seconds with the hydraulic pressure of 350M pas, improves structure hole
Gap rate is to 60%.
The processing of raw shell：Raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that grain size is 5-8cm
Shell.
Volcanic rock particle, wooden unit and the raw shell that processing is obtained are according to 0.7：1.3：0.4 volume ratio is uniformly mixed, and is obtained
To No. 1 filler.
No. 2 fillers
The processing of volcanic rock：Pickling 4 minutes in the salpeter solution of pH5 are cleaned, natural air drying with clear water；Then in pH9
Sodium hydroxide solution in alkali cleaning 4 minutes, then cleaned with clear water, natural air drying；Fire is finally fumigated in the high steam of 8M pas
Mountain rock 3 minutes removes the salts substances of volcanic rock remained on surface, the volcanic rock particle that screening grain size is 10~20mm, porosity
It is 57%.
The processing of wooden unit：Machinery is carried out to wooden unit to smash and (regular can not cut), is sieved after smashing, and selection grain size is 8-
16cm, thickness are the wooden unit of 3-5cm.Then rifle is rushed using high pressure, wooden unit is impacted 8 seconds with the hydraulic pressure of 380 pas, improves structure hole
Rate is to 70%.
The processing of raw shell：Raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that grain size is 5-8cm
Shell.
The volcanic rock particle and wooden unit that processing is obtained are with raw shell according to 1.3：0.7：0.6 volume ratio is uniformly mixed,
Obtain No. 2 fillers.
No. 3 fillers
The processing of volcanic rock：Pickling 5 minutes in the sulfuric acid solution of pH4 are cleaned, natural air drying with clear water；Then exist
Alkali cleaning 5 minutes in the potassium hydroxide solution of pH10, then cleaned with clear water, natural air drying；Finally smoked in the high steam of 10M pas
It steams volcanic rock 3 minutes, removes the salts substances of volcanic rock remained on surface, the volcanic rock particle that screening grain size is 10~20mm, hole
Gap rate is 60%.
The processing of wooden unit：Machinery is carried out to wooden unit to smash and (regular can not cut), is sieved after smashing, and selection grain size is 8-
16cm, thickness are the wooden unit of 3-5cm.Then rifle is rushed using high pressure, wooden unit is impacted 10 seconds with the hydraulic pressure of 400M pas, improves structure hole
Gap rate is to 75%.
The processing of raw shell：Raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that grain size is 5-8cm
Shell.
Volcanic rock particle, wooden unit and the raw shell that processing is obtained are according to 1：1：0.5 volume ratio is uniformly mixed, and obtains 3
Number filler.
No. 4 fillers
Machinery is carried out with raw shell to volcanic rock, wooden unit respectively to smash, be sieved, choose the volcanic rock that grain size is 10~20mm
Particle, the wooden unit that grain size 8-16cm, thickness are 3-5cm, grain size are the life shell of 5-8cm.
By the volcanic rock particle of screening, wooden unit with raw shell according to 1：1：0.5 volume ratio is uniformly mixed, and is obtained No. 4 and is filled out
Material, as a control group.
No. 5 fillers
Using haydite as raw material, filler is prepared in accordance with the following steps：By the hydrogen of the ferric chloride solution of 1.5mol/L and pH10
Potassium oxide solution is sufficiently mixed, and is added haydite and is sufficiently mixed, and 3h is then roasted at 400 DEG C, obtains No. 5 fillers.
2, bio-film colonization
5 kinds of fillers that step 1 obtains are respectively charged into 5 bacteria bed region casees, without compressing, are uniformly mixed i.e.
It can.It is fitted into the determination method of the packing volume in the case of bacteria bed region：Packing volume is Am3, exhausted air quantity Bm3/ s (must be by
m3/ h is scaled m3/ s), A/B=C, it is necessary to meet 20s≤C≤30s.Existed respectively using No. 1 bacterium solution that 2 step 3 of embodiment obtains
1~No. 5 filler surface carries out bio-film colonization, and steps are as follows：It is sprayed at bacterium solution iterative cycles and uniformly advance dress by water pump
Enter on the filler in the case of bacteria bed region, by debugging in 5~7 days, filler surface is made to adhere to uniform active biological film.
To 1~No. 5 bacteria bed, 1~No. 5 filler is corresponded to respectively.
3, the detection of exhaust treatment efficiency
1~No. 5 bacteria bed obtained with step 2 is respectively handled same a collection of industrial waste gas.It is main in exhaust gas
Pollutant is volatile organic gases (VOC) 2744.35mg/m3, exhausted air quantity 16000m3/ h, 3000 pa of air inlet wind pressure.
Steps are as follows：
Pending exhaust gas enters pretreatment zone by gas collection pipeline, using gas-liquid misphase exchange way, by gas
Body is adjusted to saturated humidity, and after temperature is adjusted to 15~35 DEG C, exhaust gas enters from bacteria bed bottom, upwardly through biological filter
Bed.The top of bacteria bed region case is equipped with humidification spray equipment, and with the rate of 4L/d, the frequency of 1min/h is sprayed to bacteria bed
Spill tap water or middle water.Purified gas is discharged through exhaust tube, the pollutant concentration in detection exhaust tube exit.
The results are shown in Table 2, the exhaust treatment efficiency highest of No. 3 fillers, up to 99.85%, than untreated No. 4 fillers
Purification efficiency it is high by 8.01%, Billy is high by 10.24% with the purification efficiency of No. 5 fillers prepared by existing method.
The performance of 2.1~No. 5 fillers of table compares
Embodiment 4. handles the case of industrial waste gas using the method for the present invention
Prepare bacteria bed as follows：
(1) filler is prepared
The processing of volcanic rock：Pickling 3-5 minutes in the sulfuric acid solution of pH4-6, then clean, the natural air drying with clear water；So
Afterwards alkali cleaning 3-5 minutes in the potassium hydroxide solution of pH8-10, then clean, the natural air drying with clear water；Finally in 5M-10M pas
Volcanic rock being fumigated in high steam 2-3 minutes, removing the salts substances of volcanic rock remained on surface, screening grain size is 10~20mm's
Volcanic rock particle.
The processing of wooden unit：Machinery is carried out to wooden unit to smash, is sieved after smashing, and grain size 8-16cm, the wood of thickness 3-5cm are chosen
Block.Then rifle is rushed using high pressure, wooden unit is impacted 5-10 seconds with the hydraulic pressure of 350M-400M pas, improve structure porosity to 60-
75%.
The processing of raw shell：Raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that grain size is 5-8cm
Shell.
Volcanic rock particle, wooden unit and the raw shell that processing is obtained are according to 0.7-1.3：0.7-1.3：The volume of 0.4-0.6
Than after mixing, being fitted into the case of bacteria bed region, without compressing.It is fitted into packing volume in the case of bacteria bed region really
Determine method：Packing volume is Am3, exhausted air quantity Bm3/ s (must be by m3/ h is scaled m3/ s), A/B=C, it is necessary to meet 20s≤C
≤30s。
(2) bio-film colonization
No. 1 bacterium solution iterative cycles in reactor for being obtained 2 step 3 of embodiment by water pump, and be uniformly sprayed at pre-
It is initially charged on the filler of bacteria bed region case, by debugging in 5~7 days, filler surface is made to adhere to uniform active biological film,
Obtain bacteria bed.
Case 1
1. process object：Wuhai of Inner Mongolia's Fine Chemical Works exhaust gas, major pollutants are volatile organic gases
(VOC) and benzene class, total exhausted air quantity are 25000m3/h。
2. processing method：Pending exhaust gas enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, is humidified for biomembrane, provides flora life required moisture content, daily water consumption
For 5L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 2
1. process object：Guizhou synthesizes ammonia plant gas, and major pollutants are volatile organic gases (VOC), vulcanization
Hydrogen, ammonia and carbon disulfide, total exhausted air quantity are 22000m3/h。
2. processing method：Pending exhaust gas enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, is humidified for biomembrane, provides flora life required moisture content, daily water consumption
For 4L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 3
1. process object：Jiangsu chemical plant sewage disposal system exhaust gas, major pollutants are volatile organic gases
(VOC), hydrogen sulfide, total exhausted air quantity are 15000m3/h。
2. processing method：Pending exhaust gas enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, is humidified for biomembrane, provides flora life required moisture content, daily water consumption
For 2.5L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 4
1. process object：Hubei chemical plant exhaust gas, major pollutants are volatile organic gases (VOC), hydrogen sulfide, ammonia
Gas and carbon disulfide, total exhausted air quantity are 30000m3/h。
2. processing step：Pending exhaust gas enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, is humidified for biomembrane, provides flora life required moisture content, daily water consumption
For 8L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Claims (11)
1. for improving the growth-promoting flora of exhaust treatment efficiency, which is characterized in that including mass ratio be 0.9-1.1：0.8-1.0：
0.9-1.1：Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and the colloid bacillus cereus of 2.7-3.5.
2. the growth-promoting flora according to claim 1 for improving exhaust treatment efficiency, which is characterized in that double qi bars
Bacterium, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 1：1：1：3.
3. a kind of bacteria bed for exhaust-gas treatment, which is characterized in that the microbial film comprising filler and the attachment of filler surface,
The microbial film is by target flora mixture and the growth-promoting as claimed in claim 1 or 2 for improving exhaust treatment efficiency
Manufactured bacterium solution is formed on filler surface by bio-film colonization after flora mixing；
The target flora mixture refers to the flora mixture for handling exhaust gas.
4. the bacteria bed according to claim 3 for exhaust-gas treatment, which is characterized in that the target flora mixture
Mass ratio with the growth-promoting flora is 7-8：1-1.5.
5. the bacteria bed according to claim 3 or 4 for exhaust-gas treatment, which is characterized in that the filler by comprising
Volume ratio is 0.7-1.3：0.7-1.3：The raw material of the volcanic rock particle of 0.4-0.6, wooden unit and raw shell is made.
6. the bacteria bed according to claim 5 for exhaust-gas treatment, which is characterized in that
The preparation method of the volcanic rock particle includes：Pickling is carried out in weak acid solution, then is cleaned with clear water, natural air drying；
Then alkali cleaning is carried out in weak caustic solution, then is cleaned with clear water, natural air drying；Volcanic rock finally is fumigated with high steam, is removed
The salts substances of volcanic rock remained on surface, the volcanic rock particle that screening grain size is 10~20mm；
The preparation method of the wooden unit includes：Machinery is carried out to wooden unit to smash, and is chosen the wooden unit that grain size is 8~16cm, is used high pressure
Rifle impact is rushed, improves structure porosity to 60-75%；
The preparation method of the raw shell includes：Raw shell is cleaned with clear water, is smashed after drying, the life that grain size is 5~8cm is chosen
Shell；
The volcanic rock particle prepared, wooden unit and raw shell are obtained into filler after mixing.
7. the bacteria bed according to claim 6 for exhaust-gas treatment, which is characterized in that
In the preparation method of the volcanic rock particle, the weak acid is the nitric acid or sulfuric acid solution of pH4-6, pickling time 3-5
Minute；The weak base is the sodium hydroxide or potassium hydroxide solution of pH8-10, and the alkali cleaning time is 3-5 minutes；The high steam
Stifling refer to fumigates volcanic rock 2-3 minutes in the steam of 5M-10M pas；
In the preparation method of the wooden unit, the high pressure rushes rifle and impacts to refer to impacts the wooden unit using the hydraulic pressure of 350M-400M pas
5-10 seconds.
8. a kind of emission-control equipment, which is characterized in that include any biologies for exhaust-gas treatment of claim 3-7
Filter bed.
Described in 9. the growth-promoting flora or claim 3-7 as claimed in claim 1 or 2 for improving exhaust treatment efficiency is any
The application of bacteria bed or emission-control equipment according to any one of claims 8 in exhaust-gas treatment for exhaust-gas treatment.
10. a kind of waste gas processing method, which is characterized in that using any lifes for exhaust-gas treatment of claim 3-7
Object filter bed or emission-control equipment according to any one of claims 8 carry out exhaust-gas treatment.
11. the growth-promoting flora or claim 3-7 according to claim 1 or 2 for improving exhaust treatment efficiency is any
The described bacteria bed for exhaust-gas treatment or emission-control equipment according to any one of claims 8, which is characterized in that the exhaust gas
Including benzene, toluene, ethylbenzene, hydrogen sulfide, carbon disulfide and/or ammonia.
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