CN110883049A - Comprehensive treatment method for kitchen waste - Google Patents
Comprehensive treatment method for kitchen waste Download PDFInfo
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- CN110883049A CN110883049A CN201911104607.3A CN201911104607A CN110883049A CN 110883049 A CN110883049 A CN 110883049A CN 201911104607 A CN201911104607 A CN 201911104607A CN 110883049 A CN110883049 A CN 110883049A
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 17
- 239000004519 grease Substances 0.000 claims abstract description 12
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 239000002002 slurry Substances 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 15
- 238000000855 fermentation Methods 0.000 claims description 14
- 238000010564 aerobic fermentation Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000002351 wastewater Substances 0.000 claims description 11
- 239000010794 food waste Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 239000007790 solid phase Substances 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 8
- 230000004151 fermentation Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 8
- 238000005191 phase separation Methods 0.000 claims description 7
- 230000020477 pH reduction Effects 0.000 claims description 6
- 241001148471 unidentified anaerobic bacterium Species 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 5
- 230000007062 hydrolysis Effects 0.000 claims description 5
- 238000006460 hydrolysis reaction Methods 0.000 claims description 5
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 208000005156 Dehydration Diseases 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 230000000593 degrading effect Effects 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
- B09B3/45—Steam treatment, e.g. supercritical water gasification or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
- C05F9/04—Biological compost
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biotechnology (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Thermal Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a kitchen waste comprehensive treatment method, which is characterized in that kitchen waste is subjected to harmless treatment through the action of a pretreatment system, an anaerobic consumption system and a sewage treatment system, the kitchen waste is comprehensively treated through resource utilization, economic grease, organic fertilizer and methane can be produced, sewage generated in the kitchen waste is effectively treated, secondary pollution to the environment is avoided, the process method is novel and practical, and the recovery rate is high.
Description
Technical Field
The invention relates to the field of kitchen waste treatment, in particular to a comprehensive treatment method for kitchen waste.
Background
Kitchen waste is treated uniformly according to a solid waste treatment method. The treatment method mainly comprises a physical method, a chemical method, a biological method and the like. The specific treatment techniques include landfill, incineration, composting, fermentation and the like, and the resource recycling of the treatment techniques tends to be diversified. In the prior art, the landfill method aims at eliminating garbage and cannot realize the recycling of the kitchen garbage. The incineration equipment has higher requirements and needs to be equipped with flue gas treatment equipment. The project investment is large, and the recovery period is long. And the compost fertilizer quality is not high, and meanwhile, the higher quality composting mode has higher cost and difficult popularization. The fermentation investment is large, the operation period is long, the treatment cost of the biogas slurry is high, the physical separation or crushing is carried out, the cost is high, and the recycling is low. Therefore, a comprehensive treatment method for the kitchen waste which is harmless and can be recycled is needed.
Disclosure of Invention
The invention aims to provide a comprehensive treatment method for kitchen waste, which is harmless and can be recycled.
In order to realize the technical purpose, the technical scheme of the invention is as follows: a comprehensive treatment method for kitchen waste is characterized by comprising the following steps:
s1, firstly, carrying out dry-wet separation on the food waste through pretreatment, carrying out aerobic fermentation on the dry waste to prepare an organic fertilizer, carrying out three-phase separation on the wet waste, and inputting concentrated water into an anaerobic consumption system for treatment;
s2, performing regulation and control treatment on the wastewater, performing anaerobic fermentation treatment, degrading organic matters to generate biogas, and allowing the rest biogas slurry to flow into a sewage treatment system for treatment;
s3, carrying out multilayer chemical treatment on biogas slurry, dehydrating sludge, carrying out aerobic fermentation, and discharging the rest wastewater after reaching the standard.
The invention has the advantages that the kitchen waste is harmlessly treated and resource utilization is achieved through the functions of the pretreatment system, the anaerobic consumption system and the sewage treatment system, the kitchen waste is comprehensively treated, economic grease, organic fertilizer and methane can be produced, the sewage and odor generated in the kitchen waste are effectively treated, secondary pollution to the environment is avoided, the process method is novel and practical, and the recovery rate is high.
Further, the step S1 further includes the following steps:
a1, weighing the dining car by a weighing system, driving the dining car into a discharge position at a set position after weighing, and pouring the kitchen waste into a hopper;
a2, the kitchen waste is changed into liquid phase and solid phase through extrusion sorting equipment.
Further, the A2 further comprises the following steps:
b1, conveying the heated materials after the liquid phase material garbage is subjected to damp-heat treatment to three separation stages through a screw pump;
b2, purifying the separated grease by grease filtering equipment, storing for sale, removing impurities from the separated concentrated water by concentrated water filtering equipment, feeding the separated solid-phase impurities into an anaerobic consumption system, and performing aerobic fermentation to obtain the organic fertilizer.
Further, the step S2 further includes the following steps:
c1, pumping the concentrated water of the food waste after the wet-heat hydrolysis and the three-phase separation into a tank area adjusting tank;
c2, the concentrated water is used by the stirrer and the heat exchanger in the adjusting tank, the heat in the water is carried out to the cooling water pool by the low-temperature circulating water and is dissipated through the cooling tower on the cooling water pool;
c3, after temperature adjustment, the temperature of the concentrated water is kept between 37 and 40 ℃. And the anaerobic water is pumped to the bottom of the fermentation tank by an anaerobic water inlet pump, and water is fed in by adopting a pressure point type water distribution mode;
and C4, fully contacting the wastewater with anaerobic bacteria, converting degradable organic matters into biogas, discharging the biogas through a top collection system, and enabling the degraded biogas slurry to overflow from the top of the tank to flow to a buffer tank and enter a sewage treatment system.
Further, the step C4 further includes the following steps:
d1, the biogas enters a gas storage cabinet after desulfurization treatment;
d2: after being pressurized by the gas storage cabinet, the biogas is dehydrated, water vapor in the biogas is condensed and discharged, and the residual biogas is input into an external device for secondary utilization.
Further, the step S3 further includes the following steps:
f1, carrying out hydrolytic acidification treatment on the biogas slurry, and inputting the biogas slurry into an A0 biochemical pool for secondary treatment;
f2, after the secondary treatment of the AO biochemical pool is finished, discharging the treated water into the air flotation pool for secondary treatment, allowing the residual sludge to enter the sludge pool for dehydration treatment through a dehydrator, and allowing part of untreated liquid to flow back into the AO biochemical pool;
f3, purifying the water in the biochemical pool by adding chemicals again, discharging the sewage, and returning the sludge to the sludge pool for treatment.
In actual operation, weighing and recording can be automatically finished through weighing of the electronic truck scale. The kitchen waste can be conveyed to extrusion equipment for extrusion by the aid of the material receiving hopper which is subjected to stainless steel and antiseptic treatment and comprises a conveying and lifting mechanism, and the kitchen waste can be well sorted and extruded by the aid of a special organic matter screw extruder; the damp-heat treatment utilizes steam for heating, and the stainless steel reaction kettle temperature controller can control steam circulation to heat the kitchen waste to a certain temperature. And purifying and separating the materials by using three or two separation devices which operate stably. The corrosion-resistant adjusting tank can effectively adjust the temperature, the quality and the quantity of the sewage. Under the action of pressure point type water distribution, external circulation, side stirring and biogas stirring, anaerobic bacteria in the anaerobic fermentation tank are fully mixed and contacted in a reaction zone at the lower part of the fermentation tank, most of degradable organic matters are degraded, and along with the rising of water flow, biogas is further degraded to generate biogas, and biogas slurry in sludge is removed by using a biogas residue dehydrator. The water quality acidification tank can further degrade part of macromolecular organic matters in the biogas slurry into micromolecular organic matters, most of CODCr, BOD, NH3-N and other pollutants in the water are removed through an anaerobic/aerobic process, under the action of gravity, clear liquid overflows from the top, is collected through the water outlet weir and then enters the filter tank, and concentrated mixed liquid flows back to the AO tank at the front end.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a general flow chart of a comprehensive treatment method of kitchen waste according to the present invention;
FIG. 2 is a schematic flow chart of the comprehensive treatment method of kitchen waste.
Detailed Description
The present invention will be further described in detail with reference to the following specific examples:
the invention aims to provide a comprehensive treatment method for kitchen waste, which is harmless and can be recycled.
As shown in fig. 1 and fig. 2, in order to achieve the technical purpose, the technical solution of the present invention is: a comprehensive treatment method for kitchen waste is characterized by comprising the following steps:
s1, firstly, carrying out dry-wet separation on the food waste through pretreatment, carrying out aerobic fermentation on the dry waste to prepare an organic fertilizer, carrying out three-phase separation on the wet waste, and inputting concentrated water into an anaerobic consumption system for treatment;
s2, performing regulation and control treatment on the wastewater, performing anaerobic fermentation treatment, degrading organic matters to generate biogas, and allowing the rest biogas slurry to flow into a sewage treatment system for treatment;
s3, carrying out multilayer chemical treatment on biogas slurry, dehydrating sludge, carrying out aerobic fermentation, and discharging the rest wastewater after reaching the standard.
The invention has the advantages that the kitchen waste is harmlessly treated and resource utilization is achieved through the functions of the pretreatment system, the anaerobic consumption system and the sewage treatment system, the kitchen waste is comprehensively treated, economic grease, organic fertilizer and methane can be produced, the sewage and odor generated in the kitchen waste are effectively treated, secondary pollution to the environment is avoided, the process method is novel and practical, and the recovery rate is high.
Further, the step S1 further includes the following steps:
a1, weighing the dining car by a weighing system, driving the dining car into a discharge position at a set position after weighing, and pouring the kitchen waste into a hopper;
a2, the kitchen waste is changed into liquid phase and solid phase through extrusion sorting equipment.
Further, the A2 further comprises the following steps:
b1, conveying the heated materials after the liquid phase material garbage is subjected to damp-heat treatment to three separation stages through a screw pump;
b2, purifying the separated grease by grease filtering equipment, storing for sale, removing impurities from the separated concentrated water by concentrated water filtering equipment, feeding the separated solid-phase impurities into an anaerobic consumption system, and performing aerobic fermentation to obtain the organic fertilizer.
Further, the step S2 further includes the following steps:
c1, pumping the concentrated water of the food waste after the wet-heat hydrolysis and the three-phase separation into a tank area adjusting tank;
c2, the concentrated water is used by the stirrer and the heat exchanger in the adjusting tank, the heat in the water is carried out to the cooling water pool by the low-temperature circulating water and is dissipated through the cooling tower on the cooling water pool;
c3, after temperature adjustment, the temperature of the concentrated water is kept between 37 and 40 ℃. And the anaerobic water is pumped to the bottom of the fermentation tank by an anaerobic water inlet pump, and water is fed in by adopting a pressure point type water distribution mode;
and C4, fully contacting the wastewater with anaerobic bacteria, converting degradable organic matters into biogas, discharging the biogas through a top collection system, and enabling the degraded biogas slurry to overflow from the top of the tank to flow to a buffer tank and enter a sewage treatment system.
Further, the step C4 further includes the following steps:
d1, the biogas enters a gas storage cabinet after desulfurization treatment;
d2: after being pressurized by the gas storage cabinet, the biogas is dehydrated, water vapor in the biogas is condensed and discharged, and the residual biogas is input into an external device for secondary utilization.
Further, the step S3 further includes the following steps:
f1, carrying out hydrolytic acidification treatment on the biogas slurry, and inputting the biogas slurry into an A0 biochemical pool for secondary treatment;
f2, after the secondary treatment of the AO biochemical pool is finished, discharging the treated water into the air flotation pool for secondary treatment, allowing the residual sludge to enter the sludge pool for dehydration treatment through a dehydrator, and allowing part of untreated liquid to flow back into the AO biochemical pool;
f3, purifying the water in the biochemical pool by adding chemicals again, discharging the sewage, and returning the sludge to the sludge pool for treatment.
In actual operation, a catering collecting vehicle entering a factory area needs to be weighed and metered, an electronic truck scale weighing and metering system automatically finishes weighing and recording, then the vehicle drives to an unloading hall, and the vehicle backs to a specified unloading position according to a monitoring room and a field scheduling instruction. Feeding the food waste into a receiving hopper by a kitchen vehicle, converting the food waste into a liquid phase substance and a solid phase substance after the food waste passes through an extrusion sorting device, and performing aerobic fermentation on the solid phase substance to prepare an organic fertilizer; liquid phase materials are conveyed to wet heat treatment, heated materials are conveyed to three separated grease through a screw pump, the grease is further purified through grease filtering equipment and then stored for sale, separated concentrated water is further subjected to impurity removal through concentrated water filtering equipment and enters an anaerobic consumption system, separated solid phase impurities enter aerobic fermentation to be prepared into organic fertilizers, and concentrated water of the food waste subjected to wet heat hydrolysis and three-phase separation is conveyed to a tank area adjusting tank. The concentrated water is used by the stirrer and the heat exchanger in the adjusting tank, the heat in the water is taken out to the cooling water pool by the low-temperature circulating water and is dissipated through a cooling tower on the cooling water pool. After temperature adjustment, the temperature of the concentrated water is 37-40 ℃. The concentrated restaurant water after being subjected to conditioning, temperature regulation and quantity regulation is pumped to the bottom of the fermentation tank through an anaerobic water inlet pump, and water is fed in by adopting a pressure point type water distribution mode. In the anaerobic fermentation tank, the wastewater is fully contacted with anaerobic bacteria, and degradable organic matters in the wastewater are converted into methane. The degraded biogas slurry flows to the buffer tank automatically in an overflow mode from the top of the tank. The generated biogas is discharged through a top collecting system, and is subjected to desulfurization, gas holder buffer storage, dehydration and pressurization sequentially and then is supplied to a boiler, a generator or a diffusion torch. And the residual concentrated water enters a hydrolysis acidification tank, an AO tank, a secondary sedimentation tank and an air floatation tank to obtain water which reaches the standard and is discharged. The sludge is dehydrated and enters aerobic fermentation. Two systems of a workshop deodorization system and a biological liquid deodorization system can ensure that the odor reaches the standard.
In actual operation, weighing and recording can be automatically finished through weighing of the electronic truck scale. The kitchen waste can be conveyed to extrusion equipment for extrusion by the aid of the material receiving hopper which is subjected to stainless steel and antiseptic treatment and comprises a conveying and lifting mechanism, and the kitchen waste can be well sorted and extruded by the aid of a special organic matter screw extruder; the damp-heat treatment utilizes steam for heating, and the stainless steel reaction kettle temperature controller can control steam circulation to heat the kitchen waste to a certain temperature. And purifying and separating the materials by using three or two separation devices which operate stably. The corrosion-resistant adjusting tank can effectively adjust the temperature, the quality and the quantity of the sewage. Under the action of pressure point type water distribution, external circulation, side stirring and biogas stirring, anaerobic bacteria in the anaerobic fermentation tank are fully mixed and contacted in a reaction zone at the lower part of the fermentation tank, most of degradable organic matters are degraded, and along with the rising of water flow, biogas is further degraded to generate biogas, and biogas slurry in sludge is removed by using a biogas residue dehydrator. The water quality acidification tank can further degrade part of macromolecular organic matters in the biogas slurry into micromolecular organic matters, most of CODCr, BOD, NH3-N and other pollutants in the water are removed through an anaerobic/aerobic process, under the action of gravity, clear liquid overflows from the top, is collected through the water outlet weir and then enters the filter tank, and concentrated mixed liquid flows back to the AO tank at the front end.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A comprehensive treatment method for kitchen waste is characterized by comprising the following steps:
s1, firstly, carrying out dry-wet separation on the food waste through pretreatment, carrying out aerobic fermentation on the dry waste to prepare an organic fertilizer, carrying out three-phase separation on the wet waste, and inputting concentrated water into an anaerobic consumption system for treatment;
s2, performing regulation and control treatment on the wastewater, performing anaerobic fermentation treatment, degrading organic matters to generate biogas, and allowing the rest biogas slurry to flow into a sewage treatment system for treatment;
s3, carrying out multilayer chemical treatment on biogas slurry, dehydrating sludge, carrying out aerobic fermentation, and discharging the rest wastewater after reaching the standard.
2. The comprehensive treatment method for kitchen waste according to claim 1, characterized in that said step S1 further comprises the steps of:
a1, weighing the dining car by a weighing system, driving the dining car into a discharge position at a set position after weighing, and pouring the kitchen waste into a hopper;
a2, the kitchen waste is changed into liquid phase and solid phase through extrusion sorting equipment.
3. The comprehensive treatment method for kitchen waste according to claim 2, characterized in that said A2 further comprises the following steps:
b1, conveying the heated materials after the liquid phase material garbage is subjected to damp-heat treatment to three separation stages through a screw pump;
b2, purifying the separated grease by grease filtering equipment, storing for sale, removing impurities from the separated concentrated water by concentrated water filtering equipment, feeding the separated solid-phase impurities into an anaerobic consumption system, and performing aerobic fermentation to obtain the organic fertilizer.
4. The comprehensive treatment method for kitchen waste according to claim 1, characterized in that said step S2 further comprises the steps of:
c1, pumping the concentrated water of the food waste after the wet-heat hydrolysis and the three-phase separation into a tank area adjusting tank;
c2, the concentrated water is used by the stirrer and the heat exchanger in the adjusting tank, the heat in the water is carried out to the cooling water pool by the low-temperature circulating water and is dissipated through the cooling tower on the cooling water pool;
c3, after temperature adjustment, the temperature of the concentrated water is kept between 37 and 40 ℃. And the anaerobic water is pumped to the bottom of the fermentation tank by an anaerobic water inlet pump, and water is fed in by adopting a pressure point type water distribution mode;
and C4, fully contacting the wastewater with anaerobic bacteria, converting degradable organic matters into biogas, discharging the biogas through a top collection system, and enabling the degraded biogas slurry to overflow from the top of the tank to flow to a buffer tank and enter a sewage treatment system.
5. The comprehensive treatment method for kitchen waste according to claim 4, characterized in that said step C4 further comprises the steps of:
d1, the biogas enters a gas storage cabinet after desulfurization treatment;
d2: after being pressurized by the gas storage cabinet, the biogas is dehydrated, water vapor in the biogas is condensed and discharged, and the residual biogas is input into an external device for secondary utilization.
6. The comprehensive treatment method for kitchen waste according to claim 1, characterized in that said step S3 further comprises the steps of:
f1, carrying out hydrolytic acidification treatment on the biogas slurry, and inputting the biogas slurry into an A0 biochemical pool for secondary treatment;
f2, after the secondary treatment of the AO biochemical pool is finished, discharging the treated water into the air flotation pool for secondary treatment, allowing the residual sludge to enter the sludge pool for dehydration treatment through a dehydrator, and allowing part of untreated liquid to flow back into the AO biochemical pool;
f3, purifying the water in the biochemical pool by adding chemicals again, discharging the sewage, and returning the sludge to the sludge pool for treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911104607.3A CN110883049A (en) | 2019-11-13 | 2019-11-13 | Comprehensive treatment method for kitchen waste |
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| CN201911104607.3A CN110883049A (en) | 2019-11-13 | 2019-11-13 | Comprehensive treatment method for kitchen waste |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111744936A (en) * | 2020-07-09 | 2020-10-09 | 江苏洁净企业管理有限公司 | Novel kitchen waste treatment process flow |
| CN111760873A (en) * | 2020-05-14 | 2020-10-13 | 浙江青草地环境科技有限公司 | Domestic garbage on-site treatment method |
| CN111842419A (en) * | 2020-07-10 | 2020-10-30 | 江门市赛科环保科技有限公司 | Kitchen waste treatment method |
| CN112430135A (en) * | 2020-11-24 | 2021-03-02 | 北京建筑大学 | Wet garbage reinforced thermal hydrolysis-high temperature aerobic fermentation treatment system and method |
| CN112474711A (en) * | 2020-11-02 | 2021-03-12 | 蓝德环保科技集团股份有限公司 | Kitchen waste treatment system |
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