CN110304786B - Non-discharge recycling treatment device and method for treated water of organic waste food wastewater - Google Patents
Non-discharge recycling treatment device and method for treated water of organic waste food wastewater Download PDFInfo
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- CN110304786B CN110304786B CN201910119512.2A CN201910119512A CN110304786B CN 110304786 B CN110304786 B CN 110304786B CN 201910119512 A CN201910119512 A CN 201910119512A CN 110304786 B CN110304786 B CN 110304786B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B5/00—Condensers employing a combination of the methods covered by main groups F28B1/00 and F28B3/00; Other condensers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
Abstract
The present invention relates to an apparatus and method for removing various environmental pollution sources contained in organic wastes to recycle the organic wastes, in which biogas is generated from condensed water generated from the solid wastes and the liquid wastes through an anaerobic process in a state in which the organic wastes are solid-liquid separated into the respective solid wastes and liquid wastes, and is reused as a heat source of a dryer, and treated water from which foreign matters are removed through the membrane filter is reused as cooling water of a cooling tower, so that the apparatus for treating the organic wastes can be constructed in an area in which combined treatment with a terminal sewage treatment plant cannot be performed, thereby not only reducing the environmental pollution sources by treating the organic wastes, but also minimizing human and material costs.
Description
Technical Field
The present invention relates to an apparatus and a method for recycling processed water of organic waste food wastewater, which are used for removing various environmental pollution sources contained in organic waste, and more particularly, to an apparatus and a method for recycling processed water of organic waste food wastewater, which are capable of drying and recycling solid waste into fertilizer or the like after solid-liquid separating the organic waste into solid waste and liquid waste, and reusing condensed water generated during the drying of the solid waste and condensed water generated during the processing of the liquid waste as a heat source of a dryer and cooling water of a cooling tower through various reprocessing steps without discharging the condensed water, and a method for recycling the processed water of the organic waste food wastewater.
Background
Generally, organic wastes are a general term for food wastes generated at home or restaurant, etc., or sludge generated at sewage treatment plants, etc., which not only contain a large amount of water but also generate offensive odor due to corrosion, and thus, a method of molding them into solids having an extremely low water content after passing through drying and carbonization processes and processing them into compost, feed, solid fuel backfill soil, etc. has been widely used.
For example, in order to reduce the water content of organic waste, there has been proposed a treatment system in which, as shown in fig. 1, in a state where a solid-liquid separation step is performed, the waste having undergone the above-described solid-liquid separation step is subjected to a drying step to reduce the water content, and then the waste having undergone the above-described drying step is pulverized, and after metallic foreign matter is removed by magnetic screening, the waste is used as a fertilizer.
However, the treatment system shown in fig. 1 has a problem that the organic waste is reused as a feed without being buried or incinerated, and leachate or condensed water is generated in the solid-liquid separation step or the drying step, thereby polluting the surrounding environment.
In particular, in the treatment system shown in fig. 1, a method of drying the organic waste to reduce the water content is adopted, and the dryer needs to have a heat source (burner) for continuously heating the organic waste, so that a large amount of energy is consumed, and the treatment system cannot be applied to an area where condensed water generated in the drying process cannot be discharged or an area where combined treatment of effluent water cannot be performed due to a large increase in consignment treatment cost, and is difficult to be popularized.
Therefore, it is very necessary to study a process for solid-liquid separating the organic waste into solid waste and liquid waste in the treatment process of the organic waste, drying the solid waste to reuse it as fertilizer or feed, reusing biogas generated in the anaerobic digestion process of the liquid waste as a heat source, and reusing the filtered water as cooling water, thereby not only completely recycling the organic waste but also reducing the environmental pollution source.
Documents of the prior art
Patent document
(patent document 1) Korean laid-open patent publication No. 10-2015-0019062 (published: 2015.02.25.)
(patent document 2) Korean granted patent publication No. 10-1367745 (granted date: 2014.02.20.)
(patent document 3) Korean granted patent publication No. 10-1228483 (granted date: 2013.01.25.)
(patent document 4) Korean granted patent publication No. 10-1374559 (granted date: 2014.03.10.)
Disclosure of Invention
Technical problem
The present invention has been made to solve the above problems, and an object of the present invention is to provide a device and a method for recycling organic waste food wastewater without discharging the processed water, which can dry and recycle the solid waste after solid-liquid separating the organic waste into solid waste and liquid waste, and reuse the condensed water generated in the drying process of the solid waste and the condensed water generated in the processing process of the liquid waste as a heat source of a dryer and cooling water of a cooling tower through various reprocessing steps without discharging the organic waste food wastewater.
Means for solving the problems
In order to achieve the above object, the processing apparatus includes: a crushing and screening machine for crushing and sorting organic waste; a solid-liquid separator that dehydrates the organic waste crushed and sorted in the crushing and screening machine and solid-liquid separates the organic waste into respective solid waste and liquid waste; a dryer for drying the solid waste separated in the solid-liquid separator; a condenser for exchanging heat of the water vapor generated in the drying process of the dryer with cooling water of a cooling tower; a three-phase separator for separating the liquid waste separated in the solid-liquid separator into food wastewater and oil by centrifugal force; a vacuum evaporation concentrator for concentrating the food wastewater separated in the three-phase separator; a first reactor for generating biogas by reacting the condensed water separated in the reduced-pressure evaporative concentrator and the condensed water separated in the condenser with microorganisms; a second reactor for biologically degrading the digestion waste liquid separated in the first reactor to remove organic substances; a membrane filter for filtering the treated water separated in the second reactor to separate the treated water into sludge and filtered water; a heat source supply line for supplying the biogas generated in the first reactor to the boiler of the dryer; and a cooling water supply line for supplying the filtered water separated by the membrane filter to the cooling water of the cooling tower.
In order to achieve the above object, the processing method includes: a crushing and screening step, namely crushing organic waste and sorting foreign matters; a solid-liquid separation step of dehydrating and separating the organic waste supplied in the crushing and screening step into respective solid waste and liquid waste; a drying step of drying the solid waste separated in the solid-liquid separation step; a heat exchange step of exchanging heat of the steam generated in the drying step with cooling water of a cooling tower; an oil separation step of separating oil from the liquid waste separated in the solid-liquid separation step by centrifugal force; a reduced-pressure evaporation concentration step of concentrating the food wastewater separated in the oil separation step into condensed water by reducing pressure and heating; an anaerobic treatment step of receiving the condensed water separated in the reduced-pressure evaporation concentration step and generating biogas by a reaction with microorganisms; a biological treatment step of receiving the digestion waste liquid separated in the anaerobic treatment step and removing organic foreign matters by biodegradation; a membrane filtration step of filtering and separating the treated water in the biological treatment step into sludge and cooling water; a heat source supply step of supplying the biogas generated in the anaerobic treatment step as a heat source required for the drying step; a cooling water supply step of supplying the cooling water separated in the membrane filtration step to the heat exchange step; and a condensed water supply step of supplying the condensed water separated in the heat exchange step to the anaerobic treatment step.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, the present invention has at least the following effects.
First, food waste water generated during the treatment of the organic waste is reprocessed and reused as a heat source of the dryer or cooling water of the cooling tower, so that energy costs required for recycling the food waste can be reduced.
Secondly, the solid waste dried by the dryer is reused as fertilizer or feed, thereby not only realizing the complete recycling of the organic waste, but also reducing the environmental pollution source caused by the organic waste.
Third, since cooling water such as groundwater or drinking water is not separately used in the heat exchange process of the condensed water separated from the organic waste, it is possible to save the cooling water by at least 50 tons to 100 tons per day, which is economical.
Fourth, the organic waste treatment apparatus is constructed in an area where the combined treatment with the terminal sewage treatment plant cannot be performed, so that the organic waste treatment apparatus can be installed anywhere without being limited by a place, and thus the maintenance cost can be reduced.
Fifthly, the organic waste is biologically treated and removed in a state where the concentration of total volatile organic acids and the like is increased by concentrating the organic waste, so that the efficiency of removing various foreign substances contained in the condensed water can be increased, and the source of environmental pollution can be reduced.
Drawings
Fig. 1 is a schematic view showing an apparatus for treating organic waste according to the prior art.
Fig. 2 is a schematic view showing an apparatus for treating organic waste according to the present invention.
Fig. 3 is a schematic view illustrating a method of treating organic waste according to the present invention.
Detailed Description
Next, examples of the present invention will be explained.
As shown in fig. 2, the processing apparatus according to the present invention includes: a solid-liquid separator 20 that dehydrates the organic waste crushed and sorted in the crushing and screening machine 10 and solid-liquid separates the organic waste into respective solid waste and liquid waste; a dryer 30 for drying the solid waste separated in the solid-liquid separator 20; a condenser (40) for exchanging heat with the cooling water of the cooling tower (44) for the water vapor generated during the drying process of the dryer (30); a three-phase separator 50 for separating the liquid waste separated in the solid-liquid separator 20 into food wastewater and oil by centrifugal force; a vacuum evaporation concentrator 60 for concentrating the food wastewater separated in the three-phase separator 50; a first reactor 70 for reacting the condensed water separated in the reduced pressure evaporation concentrator 60 and the condensed water separated in the condenser 40 with microorganisms to produce biogas; a second reactor 80 for biologically degrading the digestion waste liquid separated in the first reactor 70 to remove organic substances; a membrane filter 90 for filtering the treated water separated in the second reactor 80 to separate the treated water into sludge and cooling water; a heat source supply line 72 for supplying the biogas generated in the first reactor 70 to the boiler 32 of the dryer 30; and a cooling water supply line 92 for supplying the filtered water separated by the membrane filter 90 to the cooling water of the cooling tower 44.
As shown in fig. 3, the processing method according to the present invention includes: a crushing and screening step, namely crushing organic waste and sorting foreign matters; a solid-liquid separation step of dehydrating and separating the organic waste supplied in the crushing and screening step into respective solid waste and liquid waste; a drying step of drying the solid waste separated in the solid-liquid separation step; a heat exchange step of exchanging heat of the steam generated in the drying step with cooling water of a cooling tower; an oil separation step of separating oil from the liquid waste separated in the solid-liquid separation step by centrifugal force; a reduced-pressure evaporation concentration step of concentrating the food wastewater separated in the oil separation step into condensed water by reducing pressure and heating; an anaerobic treatment step of receiving the condensed water separated in the reduced-pressure evaporation concentration step and generating biogas by a reaction with microorganisms; a biological treatment step of receiving the digestion waste liquid separated in the anaerobic treatment step and removing organic foreign matters by biodegradation; a membrane filtration step of filtering and separating the treated water in the biological treatment step into sludge and cooling water; a heat source supply step of supplying the biogas generated in the anaerobic treatment step as a heat source required for the drying step; a cooling water supply step of supplying the cooling water separated in the membrane filtration step to the heat exchange step; and a condensed water supply step of supplying the condensed water separated in the heat exchange step to the anaerobic treatment step.
The treatment apparatus 1 according to the present invention is an apparatus for performing solid-liquid separation of the organic waste into solid waste and liquid waste, and then performing a reprocessing process to realize complete recycling, and the treatment apparatus 1 includes the crushing and screening machine 10, the solid-liquid separator 20, the dryer 30, the condenser 40, the three-phase separator 50, the reduced-pressure evaporation and concentration device 60, the first reactor 70, the second reactor 80, and the membrane filter 90, which are sequentially combined.
That is, the treatment apparatus 1 dries the solid waste by the dryer 30 and recycles the dried solid waste, and treats the liquid waste by the three-phase separator 50, the reduced-pressure evaporation concentrator 60, the first reactor 70, the second reactor 80, and the membrane filter 90 to generate biogas and cooling water and reuse the biogas and the cooling water.
The crushing and screening machine 10 is used to crush the organic waste into an appropriate size and sort impurities such as plastics, metals, plastics, etc. contained in the organic waste, and includes a crusher to crush the organic waste and a screening machine to remove foreign materials mixed in the organic waste.
The crusher is preferably a screw-type or ball-mill-type crushing mechanism having a good crushing efficiency, and the screening machine is preferably a vibration screening machine using a mesh, a magnetic screening machine using a magnetic force, or a specific gravity screening machine using a difference in specific gravity.
The solid-liquid separator 20 is used to separate the crushed material from which the impurities are removed by the crushing and screening machine 10 into solid waste and liquid waste, and the solid-liquid separator 20 preferably employs a centrifugal separation method that selectively separates the solid waste and the liquid waste using a centrifugal force.
Also, the dryer 30 is used to accommodate and dry the solid waste separated by the solid-liquid separator 20, and is preferably a boiler 32 that reduces the water content of the solid waste to a range of at least 10% or less, and particularly, the boiler 32 is preferably a gas boiler and a combined boiler of wood dust particles.
The drying temperature of the dryer 30 is preferably 100 to 150 ℃ and the drying time is preferably 2 to 3 hours, but the drying temperature and the drying time may be appropriately adjusted as long as the water content can be reduced to 10% or less.
That is, the solid waste dried by the above-mentioned dryer 30 is conveyed to a fertilizer manufacturing process or a feed manufacturing process and reused.
The condenser 40 is configured to treat the water vapor generated during the drying process of the dryer 30, and includes a cooling tower 44 and a condensed water supply line 42, wherein the cooling tower 44 is configured to exchange heat with the water vapor, and the condensed water supply line 42 is configured to supply the condensed water generated during the condensing process of the water vapor to the first reactor 70. At this time, the cooling tower 44 may be configured to filter the vaporized water vapor to discharge.
The three-phase separator 50 is used to contain and separate the liquid waste separated in the solid-liquid separator 20 into oil and food waste water, and preferably, the oil is extracted upward by a specific gravity difference due to a centrifugal force in a state where the liquid waste is contained. The oil is converted into a resource such as soap, biodiesel, and power plant fuel in a state where harmful components are filtered and removed as much as possible.
And, the reduced pressure evaporation concentrator 60 is for concentrating the food wastewater separated in the three-phase separator 50 by reducing pressure and heating, and performs a function of concentrating the food wastewater into high concentration organic matter having Chemical Oxygen Demand (COD) of 26,000mg/L or more by evaporating at a temperature of 70 to 80 ℃ while reducing pressure to 350mmHg or less in a state of being accommodated in the food wastewater. In this case, the liquid material separated by the reduced-pressure evaporation concentrator 60 is preferably converted into a wet feed or the like through a reprocessing step.
In this case, the food wastewater separated in the three-phase separator 50 may be directly supplied to the first reactor 70 to be anaerobically treated, but the concentration of suspended matter is lower than that of the food wastewater separated by the solid-liquid separator 20, and the food wastewater is preferably treated by the reduced-pressure evaporation concentrator 60 in consideration of biological treatment of the suspended matter.
That is, unlike the food wastewater separated in the solid-liquid separator 20, the condensed water separated in the reduced-pressure evaporative concentrator 60 has a relatively low concentration of an environmental pollution source such as suspended matter, nitrogen or phosphorus, and the concentration of biodegradable total volatile organic acids, Biochemical Oxygen Demand (BOD) or COD is very high, and thus, is very useful as a biogas production-increasing agent in the case where the condensed water is fed to the first reactor 70.
At this time, it is preferable that the condensed water concentrated in the above-mentioned reduced pressure evaporation concentrator 60 is appropriately adjusted in pH and temperature in an adjustment tank in a state where it is stirred in a water collection tank to homogenize the component phases, and then supplied to the above-mentioned first reactor 70.
The first reactor 70 is used to generate biogas (particularly, methane gas) from organic matter in the condensed water separated by the reduced pressure evaporation concentrator 60 by metabolism of bacteria, acid-producing bacteria, or methanogenic bacteria in an oxygen-free environment, and converts high concentration organic matter contained in the condensed water into biogas by adjusting the pH to about 7 and maintaining the temperature within a range of 35 to 55 ℃ in a state of containing the condensed water.
The anaerobic treatment method of the first reactor 70 is preferably an Upflow Anaerobic Sludge Blanket (UASB) or the like process in which condensed water separated in the reduced pressure evaporation concentrator 60 passes through an anaerobic microorganism sludge Blanket in a lower reaction zone while flowing upward from below to remove organic matters, and sludge and organic matters in wastewater are brought into contact with each other while being stirred by autogenous gas (methane gas, carbon dioxide) generated at this time.
In this case, the first reactor 70 may further use the condensed water of the condenser 40 as an external carbon source for removing foreign matters including suspended matters from the condensed water concentrated by the reduced pressure evaporation concentrator 60.
That is, the condensed water flowing into the first reactor 70 is mixed with the condensed water supplied through the condensed water supply line 42, and the organic matter is anaerobically treated with the two condensed water at the same time, whereby the condensed water in the first reactor 70 is diluted more than the condensed water flowing from the reduced-pressure evaporative concentrator 60 and has a relatively low salt concentration.
Therefore, the condensed water supplied through the condensed water supply line 42 of the condenser 40 is easily subjected to not only the anaerobic treatment of the first reactor 70 but also the biological treatment of the second reactor 80.
The second reactor 80 is used for biologically treating the digestion waste liquid separated by the first reactor 70 in the presence of oxygen. The second reactor 80 is composed of an aeration tank, a precipitation tank, and an agglutination reaction tank in this order, and removes various environmental pollution sources including organic substances contained in the digestion waste liquid.
In this case, the second reactor 80 preferably includes an aeration tank for decomposing and oxidizing the digestion waste liquid in the presence of oxygen to remove the environmental pollution source, a precipitation tank for precipitating and removing the residual environmental pollution source untreated by the aeration tank, and an agglutination reaction tank for chemically treating the residual environmental pollution source untreated by the precipitation tank.
That is, the second reactor 80 decomposes and oxidizes the environmental pollution source (C, H, O, N, S) mixed in the digestion waste liquid by aerobic microorganisms in the presence of oxygen, thereby converting the organic environmental pollution source into inorganic substances to remove, and dehydrates and recycles the sludge generated at this time using a dehydration apparatus.
The membrane filter 90 is used to filter particulate matter, COD, BOD, and the like remaining in the treated water separated in the second reactor 80. The treated water subjected to the biological treatment in the second reactor 80 is used as the cooling water of the cooling tower 44 in a state where the treated water is filtered by a sand filter or an activated carbon filter.
In particular, filtered water from which various environmental pollution sources are removed by the membrane filter 90 is supplied to the cooling tower 44 through a cooling water supply line 92.
In this case, the treated water passing through the second reactor 80 may be discharged through the final sewage treatment, or the filtered water passing through the membrane filter 90 may be discharged through a sewer pipe, but in the present invention, it is used as the cooling water of the cooling tower 44.
The heat source supply line 72 is used to reuse the biogas generated in the first reactor 70 as a heat source without discarding the biogas, and to supply a heat source required for heating the solid waste contained in the dryer 30.
The cooling water supply line 92 is used to supply the filtered water separated by the membrane filter 90 to the cooling tower 44 and supply cooling water necessary for heat exchange of the water vapor stored in the condenser 40.
Next, the operation according to the present invention will be explained.
First, in order to operate the treating apparatus 1 according to the present invention, the above organic waste is pulverized into a size suitable for a drying work in a state where foreign materials such as plastics or metals are removed by the above crushing and screening machine 10.
Subsequently, the organic waste is subjected to dehydration treatment by centrifugal separation at a set time and a set speed in a state where the crushed organic waste is accommodated in the solid-liquid separator 20, to separate the organic waste into each of solid waste and liquid waste.
Thereafter, the solid waste is heated at a set temperature for a set time in a state where the solid waste is contained in the dryer 30 to generate a dried material, and the dried material is transported to a fertilizer manufacturing process or a feed manufacturing process and reused.
In particular, the water vapor generated in the dryer 30 is heat-exchanged in the condenser 40, and in the process, the condensed water generated in the condenser 40 is supplied to the first reactor 70 through the condensed water supply line 42.
At this time, the condensed water generated in the condenser 40 is supplied to the first reactor 70 to be used for the production of the biogas.
On the other hand, the liquid waste separated in the solid-liquid separator 20 is passed through the three-phase separator 50 to remove oil, and is further gradually purified through the reduced-pressure evaporation concentrator 60, the first reactor 70, the second reactor 80, and the membrane filter 90.
That is, in a state where the total volatile organic acids and the like are maximized in the reduced pressure evaporative concentrator 60, the condensed water passes through the first reactor 70 to generate biogas, and then also passes through the second reactor 80 to be biologically treated, so that the environmental pollution source is sequentially removed.
At this time, the biogas generated by the anaerobic reaction of the first reactor 70 is supplied to the boiler 32 through the heat source supply pipe 72, and then used as a drying heat source of the solid waste during the operation of the dryer 30. .
In particular, the filtered water filtered by the membrane filter 90 is supplied to the cooling tower 44 and reused as cooling water, so that not only the operation cost of the cooling tower 44 can be reduced, but also the food wastewater is not discharged, thereby reducing the environmental pollution source.
Therefore, energy costs are reduced by using the biogas of the first reactor 70 as a drying heat source, which is economical, and environmental pollution sources are reduced by using the filtered water of the membrane filter 90 as cooling water.
As described above, the present invention is not limited to the embodiments described above, and it is apparent to those skilled in the art to which the present invention pertains that modifications can be implemented without departing from the technical idea of the present invention claimed in the claims of the present invention, and such modifications fall within the scope of the present invention.
Description of the symbols
10: crushing and screening machine
20: solid-liquid separator
30: drying apparatus
32: boiler
40: condenser
42: condensed water supply pipeline
44: cooling tower
50: three-phase separator
60: pressure-reducing evaporation concentrator
70: first reactor
72: heat source supply pipe
80: second reactor
90: membrane filter
92: a cooling water supply conduit.
Claims (14)
1. A processing water non-discharge resource treatment device for organic waste food wastewater is characterized by comprising:
a crushing and screening machine (10) for crushing and sorting the organic waste;
a solid-liquid separator (20) that dehydrates the organic waste crushed and sorted in the crushing and screening machine (10) and solid-liquid separates the organic waste into respective solid waste and liquid waste;
a dryer (30) for drying the solid waste separated in the solid-liquid separator (20);
a condenser (40) for exchanging heat with the cooling water of the cooling tower (44) for the steam generated during the drying process of the dryer (30);
a three-phase separator (50) for separating the liquid waste separated in the solid-liquid separator (20) into food wastewater and oil by centrifugal force;
a vacuum evaporation concentrator (60) for concentrating the food wastewater separated in the three-phase separator (50);
a first reactor (70) for generating biogas by reacting the condensed water separated in the reduced-pressure evaporative concentrator (60) and the condensed water separated in the condenser (40) with microorganisms;
a second reactor (80) for biologically degrading the digestion waste liquid separated in the first reactor (70) to remove organic substances;
a membrane filter (90) for filtering the treated water separated in the second reactor (80) to separate the treated water into sludge and cooling water;
a heat source supply line (72) for supplying the biogas generated in the first reactor (70) to the boiler (32) of the dryer (30); and
and a cooling water supply line (92) for supplying the treated water separated by the membrane filter (90) to the cooling water of the cooling tower (44).
2. The non-discharge recycling apparatus for treated water of organic waste food wastewater according to claim 1,
the crushing and screening machine (10) comprises a crusher for crushing the organic waste and a screening machine for removing foreign matters contained in the organic waste,
the screening machine is at least one of a vibration screening machine using a mesh, a magnetic screening machine using a magnetic force, and a specific gravity screening machine using a specific gravity difference.
3. The non-discharge recycling apparatus for treated water of organic waste food wastewater according to claim 1,
the three-phase separator (50) is a three-phase centrifugal separator which accommodates the liquid waste separated in the solid-liquid separator (20), separates the liquid waste into at least three specific gravity layers by centrifugal force, and selectively extracts a specific gravity layer in which the oil is present.
4. The non-discharge recycling apparatus for treated water of organic waste food wastewater according to claim 1,
the reduced-pressure evaporation concentrator (60) receives the food wastewater from the three-phase separator (50), and evaporates at 70-80 ℃ while reducing the pressure to 350mmHg or less to concentrate the food wastewater into a high-concentration organic matter having a COD of 26,000mg/L or more.
5. The apparatus for recycling processed water of organic waste, food and wastewater as claimed in claim 1, wherein said first reactor (70) employs an upflow anaerobic sludge blanket process.
6. The non-discharge recycling apparatus for treated water of organic waste food wastewater according to claim 1,
the first reactor (70) adjusts the pH to 7 and maintains the temperature within the range of 35-55 ℃ in a state of accommodating the condensed water separated by the reduced pressure evaporation concentrator (60) and the condensed water separated by the condenser (40).
7. The non-discharge recycling apparatus for treated water of organic waste food wastewater according to claim 1,
the first reactor (70) further uses the condensed water from the condenser (40) as an external carbon source for removing foreign matters including suspended matters from the condensed water concentrated by the reduced-pressure evaporative concentrator (60).
8. A method for recycling treated water of organic waste food wastewater without discharging is characterized by comprising the following steps:
a crushing and screening step, namely crushing organic waste and sorting foreign matters;
a solid-liquid separation step of dehydrating and separating the organic waste supplied in the crushing and screening step into respective solid waste and liquid waste;
a drying step of drying the solid waste separated in the solid-liquid separation step;
a heat exchange step of exchanging heat of the steam generated in the drying step with cooling water of a cooling tower;
an oil separation step of separating oil from the liquid waste separated in the solid-liquid separation step by centrifugal force;
a reduced-pressure evaporation concentration step of concentrating the food wastewater separated in the oil separation step into condensed water by reducing pressure and heating;
an anaerobic treatment step of receiving the condensed water separated in the reduced-pressure evaporation concentration step and generating biogas by a reaction with microorganisms;
a biological treatment step of receiving the digestion waste liquid separated in the anaerobic treatment step and removing organic foreign matters by biodegradation;
a membrane filtration step of filtering and separating the treated water in the biological treatment step into sludge and cooling water;
a heat source supply step of supplying the biogas generated in the anaerobic treatment step as a heat source required for the drying step;
a cooling water supply step of supplying the cooling water separated in the membrane filtration step to the heat exchange step; and
a condensed water supply step of supplying the condensed water separated in the heat exchange step to the anaerobic treatment step.
9. The non-discharge recycling method of treated water of organic waste food wastewater according to claim 8,
in the drying step, the biogas generated in the anaerobic treatment step is used as a drying heat source of the solid waste supplied from the crushing and screening step.
10. The non-discharge recycling method of treated water of organic waste food wastewater according to claim 8,
in the oil separation step, the liquid waste separated in the solid-liquid separation step is separated into at least three specific gravity layers by centrifugal force, and then the specific gravity layer where the oil is present is selectively extracted.
11. The non-discharge recycling method of treated water of organic waste food wastewater according to claim 8,
in the reduced pressure evaporation concentration step, the food wastewater separated in the oil separation step is contained, and evaporation is performed at a temperature of 70 to 80 ℃ while reducing the pressure to 350mmHg or less, so that the food wastewater is concentrated into a high concentration organic matter having a COD of 26,000mg/L or more.
12. The method for recycling treated water of organic waste, food and wastewater as claimed in claim 8, wherein said anaerobic treatment step is an upflow anaerobic sludge blanket process.
13. The non-discharge recycling method of treated water of organic waste food wastewater according to claim 8,
in the anaerobic treatment step, the pH is adjusted to 7 and the temperature is maintained within the range of 35-55 ℃ in a state of accommodating the condensed water separated in the reduced pressure evaporation concentration step and the condensed water separated in the heat exchange step.
14. The non-discharge recycling method of treated water of organic waste food wastewater according to claim 8,
further using the condensed water of the heat exchange step in the anaerobic treatment step as an external carbon source for removing foreign matters including nitrogen or phosphorus contained in the condensed water concentrated in the reduced-pressure evaporation concentration step.
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| KR102045190B1 (en) * | 2018-11-16 | 2019-11-14 | 주식회사 한국종합기술 | Production System for Agent of Production Increase for Biogas Using Food Waste Water |
| CN109678318A (en) * | 2019-02-19 | 2019-04-26 | 南通常安能源有限公司 | A kind of sludge drying method |
| CN111072134A (en) * | 2019-12-02 | 2020-04-28 | 轻工业环境保护研究所 | High-concentration organic waste liquid treatment process |
| CN113118184B (en) * | 2021-04-17 | 2022-08-16 | 苏州华益洁环境能源技术有限公司 | Environment-friendly intelligent treatment system and method for kitchen waste |
| KR102648024B1 (en) * | 2023-02-17 | 2024-03-18 | 강동바이오 주식회사 | Organic waste treatment apparatus with improved treatment efficiency of liquid waste and method for treating organic waste using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09290249A (en) * | 1996-04-25 | 1997-11-11 | Ebara Corp | Treatment of organic waste liquid |
| KR100665251B1 (en) * | 2006-06-24 | 2007-01-04 | 주식회사 화인이엔씨 | Carbonize system for inorganic and organic waste and dealing method |
| KR101205962B1 (en) * | 2012-09-07 | 2012-11-29 | 주식회사 이엔이티아이 | Method and a device to synthesis gas production from high moisturized organic waste over the course of the synthetic coal |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001068563A1 (en) * | 2000-03-15 | 2001-09-20 | Japan Noble Systems Inc. | Method and apparatus for producing organic fertilizer |
| CN1743284A (en) * | 2004-08-30 | 2006-03-08 | 徐宝安 | Sewage-refuse treatment clean-production system at the center of generating plant |
| KR20110046813A (en) * | 2009-10-29 | 2011-05-06 | 권혁선 | Bio- gas Regenerative Waste Processing Apparatus and Methode |
| CN102794289B (en) * | 2012-07-20 | 2014-11-26 | (株)新海Ecotech | Recycling treatment method of organic waste |
| KR101228483B1 (en) | 2012-10-25 | 2013-01-31 | (주) 리클린 | Food-waste recycling system with increased energy efficiency by circulating liquid extracted from leachat |
| KR20150019062A (en) | 2013-08-12 | 2015-02-25 | 박현수 | Food wastes dry product fertilizer using food waste and manufacturing the same |
| KR101367745B1 (en) | 2013-11-22 | 2014-03-03 | 코오롱환경서비스주식회사 | Recycling system of organic waste |
| KR101374559B1 (en) | 2013-12-13 | 2014-03-17 | (주)에스에이치이엔지 | Organic waste recycling system |
| KR20160048280A (en) * | 2014-10-23 | 2016-05-04 | 한국생산기술연구원 | organic waste sludge drying apparatus |
| CN104556571B (en) * | 2014-12-25 | 2017-04-12 | 武汉凯迪工程技术研究总院有限公司 | Recycling treatment process and system for wastewater in Fischer-Tropsch synthesis reaction |
-
2018
- 2018-03-21 KR KR1020180032575A patent/KR101853734B1/en active IP Right Grant
-
2019
- 2019-02-18 CN CN201910119512.2A patent/CN110304786B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09290249A (en) * | 1996-04-25 | 1997-11-11 | Ebara Corp | Treatment of organic waste liquid |
| KR100665251B1 (en) * | 2006-06-24 | 2007-01-04 | 주식회사 화인이엔씨 | Carbonize system for inorganic and organic waste and dealing method |
| KR101205962B1 (en) * | 2012-09-07 | 2012-11-29 | 주식회사 이엔이티아이 | Method and a device to synthesis gas production from high moisturized organic waste over the course of the synthetic coal |
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