CN110950516B - System and method for comprehensively treating livestock and poultry manure and household garbage - Google Patents
System and method for comprehensively treating livestock and poultry manure and household garbage Download PDFInfo
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- CN110950516B CN110950516B CN201911184099.4A CN201911184099A CN110950516B CN 110950516 B CN110950516 B CN 110950516B CN 201911184099 A CN201911184099 A CN 201911184099A CN 110950516 B CN110950516 B CN 110950516B
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- anaerobic fermentation
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- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 76
- 210000003608 fece Anatomy 0.000 title claims abstract description 41
- 239000010871 livestock manure Substances 0.000 title claims abstract description 40
- 244000144972 livestock Species 0.000 title claims abstract description 34
- 244000144977 poultry Species 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 23
- 238000000855 fermentation Methods 0.000 claims description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 230000002550 fecal effect Effects 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 238000010248 power generation Methods 0.000 claims description 18
- 239000010865 sewage Substances 0.000 claims description 18
- 239000002918 waste heat Substances 0.000 claims description 18
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 15
- 238000000108 ultra-filtration Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- 230000004151 fermentation Effects 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 10
- 238000009264 composting Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 239000008235 industrial water Substances 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001728 nano-filtration Methods 0.000 claims description 4
- 238000001223 reverse osmosis Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims 1
- 238000004056 waste incineration Methods 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 10
- 239000003242 anti bacterial agent Substances 0.000 abstract description 6
- 229940088710 antibiotic agent Drugs 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 230000029087 digestion Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 241000287828 Gallus gallus Species 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
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- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
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- 239000004576 sand Substances 0.000 description 2
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- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000009395 breeding Methods 0.000 description 1
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- 239000000779 smoke Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
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- 238000009270 solid waste treatment Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
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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
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/305—Endocrine disruptive agents
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
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- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- 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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Abstract
The invention provides a livestock and poultry manure and household garbage comprehensive treatment system and method, and provides and constructs a livestock and poultry manure and household garbage multi-pollutant comprehensive resource utilization process. The invention can realize the stable digestion of biogas residues and biogas slurry, and eliminate the uncertainty of the economic benefit of biogas engineering projects; meanwhile, the pollution problem of heavy metals and antibiotics is thoroughly solved, and the hidden trouble of secondary pollution is eliminated. The invention can truly realize zero emission of two pollutants of livestock and poultry manure and household garbage in comprehensive treatment projects.
Description
Technical Field
The invention belongs to the technical field of environmental protection for solid waste treatment, and particularly relates to a livestock and poultry manure and household garbage comprehensive treatment system and method.
Background
Anaerobic fermentation for preparing biogas is the most mainstream treatment technology of livestock and poultry manure at present. However, research shows that the current Chinese breeding industry is not standardized, the scale is small, the quantity is large, and the stable supply of fermentation raw materials is restricted. Meanwhile, the following problems remain in the production process to restrict the industrialized development of the compound:
(1) The byproducts are difficult to be absorbed, and the fluctuation of project economic benefits is large. The biogas manure market as an important income source is still in cultivation, the market demand is unknown, stable economic income is difficult to form, a large amount of generated biogas slurry is more difficult to treat, and the unavailable biogas residue and biogas slurry also cause secondary pollution to the environment.
(2) The problem that heavy metals and antibiotics in livestock and poultry manure generally exceed standards is difficult to solve. Heavy metals and antibiotics in biogas residues and biogas slurry after anaerobic fermentation are generally out of standard, and the continuous application of the organic fertilizer can cause soil pollution, so that the heavy metals and the antibiotics finally enter human bodies through foods to endanger the health.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a system and a method for comprehensively treating livestock and poultry manure and household garbage. The stable digestion of biogas residues and biogas slurry can be realized, and the uncertainty of the economic benefit of biogas engineering projects is eliminated; meanwhile, the pollution problem of heavy metals and antibiotics is thoroughly solved, and the hidden trouble of secondary pollution is eliminated. The invention can truly realize zero emission of two pollutants of livestock and poultry manure and household garbage in comprehensive treatment projects.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a livestock and poultry manure and household garbage comprehensive treatment system, comprising:
the fecal sewage anaerobic fermentation device is used for carrying out anaerobic fermentation on the pretreated livestock and poultry fecal sewage;
the biogas purification system is used for purifying biogas generated by the fecal sewage anaerobic fermentation device;
the gas storage cabinet is used for storing the biogas purified by the biogas purifying system;
the biogas cogeneration generator set is used for generating electricity by purifying the stored biogas and supplying waste heat to the fecal sewage anaerobic fermentation device and the advanced treatment system;
the solid-liquid separation device is used for carrying out solid-liquid separation on waste generated by the fecal sewage anaerobic fermentation device to separate biogas slurry and biogas residues;
the household garbage pool is used for receiving the household garbage and the biogas residues separated by the solid-liquid separation device;
the advanced treatment system is used for carrying out advanced treatment on leachate generated by the household garbage pool and biogas slurry separated by the solid-liquid separation device, conveying biogas generated by the advanced treatment to the biogas purification system, conveying sludge to the fecal anaerobic fermentation device, and conveying reuse water and concentrated solution to the garbage incineration power generation system;
the garbage incineration power generation system further comprises:
the garbage incinerator is used for incinerating the household garbage and biogas residues which are piled and retted in the household garbage pool;
the gas purifying device is used for purifying the waste gas from the household garbage pool and the flue gas generated by incineration;
the cement solidifying device is used for solidifying the cement of the fly ash generated by incineration;
the turbo generator set is used for generating electricity through hot flue gas generated by burning and supplying waste heat to the fecal sewage anaerobic fermentation device and the advanced treatment system.
Preferably, the fecal sewage anaerobic fermentation device comprises a CSTR anaerobic fermentation tank. More preferably, a central stirrer is arranged at the top of the CSTR anaerobic fermentation tank, and a heating coil is arranged on the wall of the tank.
Preferably, the gas holder is a double-film dry gas holder.
Preferably, the advanced treatment system further comprises:
the UASB anaerobic reactor is used for carrying out anaerobic reaction on the percolate and the biogas slurry to generate biogas and sludge;
the external biochemical ultrafiltration system of MBR is used for carrying out ultrafiltration treatment on the effluent of the UASB anaerobic reactor;
and the deep membrane treatment system is used for performing reverse osmosis/nanofiltration deep treatment on the ultrafiltration effluent to generate reuse water and concentrated solution.
A method for comprehensively treating livestock and poultry manure and household garbage comprises the following steps:
1) Anaerobic fermentation is carried out on livestock and poultry manure, the generated biogas is used for cogeneration power generation of biogas after being purified, waste heat is used for anaerobic fermentation or advanced treatment, and the generated waste is subjected to solid-liquid separation to separate biogas slurry and biogas residue;
2) Mixing the separated biogas residues with household garbage, composting the biogas residues with oxygen, and then delivering the biogas residues to a garbage incinerator for incineration, wherein the generated high-temperature flue gas is used for power generation and the waste heat is used for anaerobic fermentation or advanced treatment; carrying out advanced treatment on the separated biogas slurry and percolate generated by stack retting, wherein the generated sludge and biogas are used in the step 1), the generated reuse water is used as industrial water, and the concentrated solution is sprayed back to a garbage incinerator;
3) And (3) purifying and discharging the flue gas generated by the incineration in the step (2), and carrying out landfill treatment on the fly ash in the flue gas after the cement is solidified and slag generated by the incineration.
Preferably, in the step 1), the method further comprises the step of pretreating the livestock and poultry manure, and adjusting the TS (Total solid) to 8-12%.
Preferably, in step 1), the medium temperature anaerobic fermentation is carried out in a CSTR anaerobic fermentation tank, the Hydraulic Retention Time (HRT) of the material in the CSTR anaerobic fermentation tank is 15-25 days, the fermentation temperature is 30-35 ℃, and the pH is 6.5-8.0.
Preferably, in step 1), the purification comprises biological desulfurization and dehydration.
Preferably, step 1) further comprises storing the purified biogas in a double membrane dry gas storage tank.
Preferably, in the step 2), the water content of the biogas residue is 55-65%, the initial water content of the household garbage is 45-55%, and the biogas residue is retted for 5-7 days in an aerobic manner.
Preferably, in step 2), the advanced treatment includes:
a) Sending the separated biogas slurry and percolate generated by stack retting into a UASB anaerobic reactor for treatment, and sending the generated biogas and sludge to the step 1) for treatment;
b) Sending the effluent of the UASB anaerobic reactor into an MBR external biochemical ultrafiltration system for ultrafiltration treatment;
c) Delivering the ultrafiltration effluent into a deep membrane treatment system for reverse osmosis/nanofiltration deep treatment, and spraying the concentrate back to a garbage incinerator for decomposition after the produced water reaches the reuse water standard for use as industrial water.
Preferably, in the step 2), the high-temperature flue gas generated by incineration enters a waste heat boiler to generate high-temperature and high-pressure steam, and then enters a steam turbine generator unit to generate electricity.
Preferably, in the step 3), the slag generated by incineration is pushed to a belt conveyor by an ash pusher and then sent to an ash landfill.
The beneficial effects of the invention are as follows:
the invention can solve the problem of multi-pollutant puzzlement of animal husbandry and household garbage, and has outstanding economic and environmental benefits. The two wastes of livestock and poultry manure and household garbage, which are extremely harmful to the environment, are thoroughly converted into high-quality energy sources (electricity and heat) and byproducts (solidified ash, smoke discharged after reaching standards and reuse water) which are almost harmless to the environment, so that the treatment difficulty of heavy metals and antibiotics in the manure is solved, and the complete closed loop and zero emission of pollutants in comprehensive treatment projects are truly realized. In addition, the jointly planned fermentation engineering and incineration power generation engineering can also realize the sharing of a methane purification storage and cogeneration system and an advanced treatment system, and simultaneously realize the standard reuse of waste liquid, thereby reducing the investment and the operation cost of the comprehensive treatment project.
Drawings
Fig. 1 is a line structure diagram of a livestock and poultry manure and household garbage comprehensive treatment system of the invention.
In the figure: 1-CSTR anaerobic fermentation tank, 2-marsh gas purifying system, 3-double-membrane dry gas storage cabinet, 4-marsh gas cogeneration generator set, 5-solid-liquid separation device, 6-advanced treatment system, 61-UASB anaerobic reactor, 62-MBR external biochemical ultrafiltration system, 63-advanced membrane treatment system, 7-household garbage pond, 8-garbage incineration power generation system, 81-grate furnace, 82-gas purifying device, 83-cement solidifying device, 84-turbo generator set, 9-livestock manure and 10-household garbage.
Fig. 2 is a technical architecture diagram of a system and a method for comprehensively treating livestock and poultry manure and household garbage.
Detailed Description
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the drawings and specific language will be used to describe the same. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention originally provides and constructs a comprehensive resource utilization process of livestock and poultry feces and household garbage multi-pollutants, which consists of livestock and poultry feces treatment engineering and garbage incineration power generation engineering as shown in figures 1 and 2.
The livestock and poultry manure treatment process comprises the following steps:
the livestock and poultry manure 9 is pretreated and regulated to about 10% of TS, and then is pumped into a CSTR anaerobic fermentation tank 1 for medium-temperature wet anaerobic fermentation. The Hydraulic Retention Time (HRT) of the materials in the anaerobic tank is 15-25 days, the fermentation temperature is controlled between 30-35 ℃, and the pH is controlled between 6.5-8.0. The top of the CSTR anaerobic fermentation tank 1 is provided with a central stirrer, so that the materials in the anaerobic tank are ensured to be fully mixed; the tank wall is provided with a heating coil pipe, and the waste heat of the generator can be utilized to heat and preserve heat of materials in the tank.
Biogas generated by anaerobic fermentation is temporarily stored in a double-film dry type gas storage cabinet 3 after biological desulfurization and dehydration by a biogas purification system 2, and is used for generating power by a subsequent biogas cogeneration generator set 4, electric energy is sold in a grid connection mode, and waste heat provides heat for heat preservation of the whole anaerobic system (comprising the CSTR anaerobic fermentation tank 1 and the UASB anaerobic reactor 61). The fermented waste forms biogas slurry through a solid-liquid separation device 5, and enters a deep treatment system 6 to realize the sharing of livestock and poultry manure and household garbage deep treatment systems; the water content of the biogas residue is about 60%, the biogas residue is input into a household garbage pond 7 and mixed with household garbage 10 with the initial water content of about 50%, and the mixture enters a garbage incineration power generation system 8 after aerobic composting for 5 to 7 days, so that the problems of biogas residue absorption and residual antibiotic pollution in the biogas residue are thoroughly solved.
(II) garbage incineration power generation engineering:
the household garbage 10 transported by the garbage truck and biogas residues are sent into the household garbage pool 7 together for composting, and after 5-7 days, the household garbage is sent into the grate furnace 81 of the garbage incineration power generation system 8 by the garbage grab bucket for incineration treatment, and at the moment, the waste gas generated by aerobic composting is also introduced into the grate furnace 81 for incineration. The high-temperature flue gas generated by incineration enters a waste heat boiler to generate high-temperature and high-pressure steam, and enters a turbo generator set 84, and electric energy is supplied for the whole project to be utilized and sold in a grid connection mode. Meanwhile, the waste heat provides a standby heat source for the UASB anaerobic reactor 61 of the fecal sewage anaerobic fermentation device and the advanced treatment system to keep constant temperature so as to prevent the failure of the biogas power generation system and the failure of maintaining the temperature of the fermentation tank.
The leachate generated by the garbage pool enters a deep treatment system 6, and a common garbage leachate deep treatment process of UASB anaerobic reactor 61+MBR external biochemical ultrafiltration system 62+deep membrane treatment system 63 is adopted to carry out combined treatment on biogas slurry and leachate. Biogas generated by the UASB anaerobic reactor 61 enters the biogas purification system 2 in the livestock and poultry manure treatment project and is stored, so that the sharing of the systems is realized. After the membrane treatment produced water reaches the reuse water standard, the membrane treatment produced water can be conveyed to a garbage incineration power plant to be used as industrial water, and the membrane concentrate produced by the deep membrane treatment system 63 is sprayed back to a garbage incinerator (grate furnace 81) for decomposition. The UASB anaerobic reactor 61 and the MBR external biochemical ultrafiltration system 62 send the sludge generated by aerobic biochemistry back to the CSTR anaerobic fermentation tank 1, so that anaerobic fermentation raw materials and sludge concentration can be increased simultaneously, and biogas yield can be improved. The waste heat of methane power generation can also provide heat for the UASB anaerobic reactor 61 to maintain the constant temperature in the tank.
And (5) discharging the boiler flue gas after standard treatment. Most of heavy metals in the biogas residues and the household garbage enter the fly ash and are discharged from the reaction absorption tower and the cloth bag filter of the gas purifying device 82. The invention also provides a set of cement solidification device 83, and the fly ash is sent to a landfill for sanitary landfill after being solidified and chelated by cement, so that no secondary release risk of heavy metals is ensured. Slag generated by incineration is pushed to a belt conveyor by an ash pushing device and then sent to an ash landfill.
In addition, unless otherwise specified, the instrumentation used in the present invention may be selected from commercially available devices and purchased.
Example 1
Pig manure is collected in a dry manure cleaning mode and is used as a raw material, 400t/d of pig manure with TS of 20% is conveyed to a septic tank, mixed with pig urine and 400t/d of flushing water in the septic tank, homogenized in the septic tank, automatically flows to a homogenizing tank, is further homogenized and hydrolyzed, homogenized in the tank, preheated and pumped to a CSTR anaerobic fermentation tank. Controlling the fermentation temperature between 30 and 35 ℃ and the pH between 6.5 and 8.0, and controlling the Hydraulic Retention Time (HRT) of the materials in the anaerobic tank to be 20 days.
The biogas generated by fermentation enters a biogas cogeneration unit after purification and desulfurization, and the waste heat provides a heat source for an anaerobic system (comprising a fecal sewage anaerobic fermentation device and a UASB anaerobic reactor) to keep constant temperature. The fermentation residues with the water content of about 90% enter filter pressing solid-liquid separation equipment and are separated into biogas slurry and biogas residues with the water content of about 60%.
And after composting, the biogas residues and the household garbage enter a garbage incineration generator set to generate electric energy and waste heat. And the flue gas is discharged after reaching the standard, and heavy metals enter the fly ash and are transported and buried outside after being solidified by a cement solidifying device. The biogas slurry and the leachate of the garbage pool are treated by an advanced treatment system to achieve the standard recycling, and the generated biogas enters a fecal sewage fermentation biogas purification storage and biogas cogeneration unit.
Example 2
After the chicken manure is conveyed to a manure treatment plant, mixing TS with dilution water to 10%, and then automatically flowing into a hydrolysis sand removal tank through a ditch; the chicken manure stays in the hydrolysis desanding tank for 2 days, the material is homogenized and hydrolyzed at a high temperature, the manure and sand are separated under the stirring action, and the material is pumped to an anaerobic tank by a screw pump. The front end of the feed pump is provided with a chopper for chopping chicken feather and other impurities to protect the normal operation of the feed pump and the rear-end equipment. Feeding the raw materials into a medium-temperature high-concentration CSTR anaerobic fermentation tank for anaerobic fermentation to produce biogas, wherein the hydraulic retention time is 25d, and the volumetric gas production rate is 1.67m 3 /（m 3 D) a step of. The tank is internally provided with a stirring, heating and heat preserving device. And (3) completely feeding the fermented liquid after anaerobic fermentation into a solid-liquid separator for solid-liquid separation treatment.
The biogas generated by fermentation enters a biogas cogeneration generator set after purification and desulfurization, and the waste heat provides a heat source for the anaerobic system to keep constant temperature. The fermentation residues with the water content of about 90% enter filter pressing solid-liquid separation equipment and are separated into biogas slurry and biogas residues with the water content of about 60%.
And after composting, the biogas residues and the household garbage enter a garbage incineration generator set to generate electric energy and waste heat. And the flue gas is discharged after reaching the standard, and heavy metals enter the fly ash and are transported and buried outside after being solidified by a cement solidifying device. The biogas slurry and the leachate of the garbage pool are treated by an advanced treatment system to achieve the standard recycling, and the generated biogas enters a fecal sewage fermentation biogas purification storage and biogas cogeneration unit.
Claims (6)
1. A livestock and poultry manure and domestic garbage comprehensive treatment system is characterized by comprising:
the fecal sewage anaerobic fermentation device is used for carrying out anaerobic fermentation on pretreated livestock and poultry fecal sewage and comprises a CSTR anaerobic fermentation tank, a central stirrer is arranged at the top of the CSTR anaerobic fermentation tank, and a heating coil is arranged on the tank wall;
the biogas purification system is used for purifying biogas generated by the fecal sewage anaerobic fermentation device;
the gas storage cabinet is used for storing the biogas purified by the biogas purifying system and is a double-film dry gas storage cabinet;
the biogas cogeneration generator set is used for generating electricity by purifying the stored biogas and supplying waste heat to the fecal sewage anaerobic fermentation device and the advanced treatment system;
the solid-liquid separation device is used for carrying out solid-liquid separation on waste generated by the fecal sewage anaerobic fermentation device to separate biogas slurry and biogas residues;
the household garbage pool is used for receiving the household garbage and the biogas residues separated by the solid-liquid separation device, so that the household garbage and the biogas residues are subjected to aerobic composting to generate percolate and waste gas;
the advanced treatment system is used for carrying out advanced treatment on leachate generated by the household garbage pool and biogas slurry separated by the solid-liquid separation device, conveying biogas generated by the advanced treatment to the biogas purification system, conveying sludge to the fecal sewage anaerobic fermentation device, and conveying reuse water and concentrated solution to the garbage incineration power generation system, and the advanced treatment system further comprises:
the UASB anaerobic reactor is used for carrying out anaerobic reaction on the percolate and the biogas slurry to generate biogas and sludge;
the external biochemical ultrafiltration system of MBR is used for carrying out ultrafiltration treatment on the effluent of the UASB anaerobic reactor;
the deep membrane treatment system is used for performing reverse osmosis/nanofiltration deep treatment on ultrafiltration effluent to generate reuse water and concentrated solution;
the garbage incineration power generation system further comprises:
the garbage incinerator is used for incinerating the household garbage and biogas residues which are piled and retted in the household garbage pool;
the gas purifying device is used for purifying the waste gas from the household garbage pool and the flue gas generated by incineration;
the cement solidifying device is used for solidifying the cement of the fly ash generated by incineration;
the turbo generator set is used for generating electricity through hot flue gas generated by burning and supplying waste heat to the fecal sewage anaerobic fermentation device and the advanced treatment system.
2. A method for comprehensively treating livestock and poultry manure and household garbage by adopting the system of claim 1, comprising the following steps:
1) Anaerobic fermentation is carried out on livestock and poultry manure, the generated biogas is used for cogeneration power generation of biogas after being purified, waste heat is used for anaerobic fermentation and advanced treatment, and the generated waste is subjected to solid-liquid separation to separate biogas slurry and biogas residue;
2) Mixing the separated biogas residues with household garbage, composting the biogas residues with oxygen, and then delivering the biogas residues to a garbage incinerator for incineration, wherein the generated high-temperature flue gas is used for power generation and the waste heat is used for anaerobic fermentation and advanced treatment; the separated biogas slurry and percolate generated by stack retting are subjected to advanced treatment, the generated sludge and biogas are used in the step 1), the generated reuse water is used as industrial water of a waste incineration power generation system, the concentrated solution is sprayed back to a waste incinerator, and the advanced treatment comprises:
a) Sending the separated biogas slurry and percolate generated by stack retting into a UASB anaerobic reactor for treatment, sending the generated biogas to the step 1) for purification, and sending the generated sludge to the step 1) for anaerobic fermentation;
b) Sending the effluent of the UASB anaerobic reactor into an MBR external biochemical ultrafiltration system for ultrafiltration treatment;
c) Delivering ultrafiltration effluent into a deep membrane treatment system for reverse osmosis/nanofiltration deep treatment, and after the produced water reaches the reuse water standard, using the produced water as industrial water of a garbage incineration power generation system, and spraying concentrated solution back to a garbage incinerator for decomposition;
3) And (3) purifying and discharging the flue gas generated by the incineration in the step (2), and carrying out landfill treatment on the fly ash in the flue gas after the cement is solidified and slag generated by the incineration.
3. The method for comprehensively treating livestock and poultry manure and household garbage according to claim 2, wherein in the step 1), the method further comprises the step of preprocessing the livestock and poultry manure and adjusting the TS to be 8-12%.
4. The method for comprehensively treating livestock and poultry manure and household garbage according to claim 2, wherein in the step 1), the livestock and poultry manure is subjected to medium-temperature anaerobic fermentation in a CSTR anaerobic fermentation tank, the hydraulic retention time of materials in the CSTR anaerobic fermentation tank is 15-25 days, the fermentation temperature is 30-35 ℃, and the pH is 6.5-8.0.
5. The method for comprehensively treating livestock and poultry manure and household garbage according to claim 2, wherein the step 1) further comprises storing the purified biogas in a double-film dry type gas holder.
6. The method for comprehensively treating livestock and poultry manure and household garbage according to claim 2, wherein in the step 2), the biogas residue water content is 55-65%, the household garbage initial water content is 45-55%, and aerobic composting is carried out for 5-7 days.
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