CN106984632B - Organic garbage treatment process - Google Patents

Organic garbage treatment process Download PDF

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Publication number
CN106984632B
CN106984632B CN201710290569.XA CN201710290569A CN106984632B CN 106984632 B CN106984632 B CN 106984632B CN 201710290569 A CN201710290569 A CN 201710290569A CN 106984632 B CN106984632 B CN 106984632B
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treatment
organic
biogas
decomposition
slurry
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CN106984632A (en
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朱勤华
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Zhejiang Huaqingyuan Biological Technology Co ltd
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Zhejiang Huaqingyuan Biological Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M43/00Combinations of bioreactors or fermenters with other apparatus
    • C12M43/08Bioreactors or fermenters combined with devices or plants for production of electricity
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses an organic garbage treatment process, which comprises the following treatment steps: crushing, primary screening, fine screening, biological oil refining, microbial decomposition, microbial anaerobic fermentation, sewage treatment, desulfurization, high-temperature steam heat supply and the like. The organic garbage treatment process disclosed by the invention has the advantages that the aerobic and anaerobic decomposition is combined with the anaerobic fermentation, so that the problem of water pollution caused by organic garbage landfill and the problem of air pollution caused by organic garbage incineration are fundamentally eliminated, no harmful substance is generated in the whole process, and harmlessness is realized; biological grease separated from organic garbage can be applied to chemical enterprises, biogas generated by fermentation has wide application, is clean and environment-friendly, and the sulfur recovered by the sulfur recovery process has high elemental purity, thereby realizing resource utilization; by adopting the aerobic and facultative decomposition process, the organic garbage can be reduced by more than 95 percent, and compared with the traditional organic anaerobic composting process, the method has the advantages of higher efficiency, more obvious reduction and reduction.

Description

Organic garbage treatment process
Technical Field
The invention relates to a garbage treatment technology, in particular to an organic garbage treatment process.
Background
The organic garbage mainly refers to garbage containing a large amount of putrescible and smelly organic matters such as kitchen garbage, agricultural wastes and the like, and mainly comprises oil, water, fruit peels, vegetables, rice flour, fish, meat, bones and a mixture of various substances such as waste tableware, plastics, paper towels and the like. The quantity of kitchen waste in China is very large and is in a rapid rising trend. The organic garbage is improperly treated, and the following hazards can be generated: the urban appearance and the living environment of a city are influenced, the visual sense and the olfactory sensation of a person are influenced, the comfort and the living sanitation are influenced, microbes such as bacteria are bred, and the earth surface and underground water are polluted; when the organic garbage is used as feed to feed livestock, impurities and foreign matters (such as gravel, iron wires, shells, bones, toothpicks, plastic products and the like) in the livestock are not properly treated, and physical damage can be caused to the digestive tracts of the livestock; the grease in the organic garbage is extracted by lawbreakers, and then the grease is sold to small food service points, restaurants and the like to gain benefits. The illegal cooking oil obtained by extraction has impurities, toxic substances such as aflatoxin and benzene can be stained in the illegal cooking oil, and chronic diseases such as tumor can be caused if the illegal cooking oil is eaten for a long time, such as gastric tumor and liver tumor.
The main method for treating organic garbage in the prior art and the defects are as follows: the garbage is buried, the buried garbage is not subjected to harmless treatment, and a large amount of bacteria and viruses are remained; hidden dangers such as heavy metal pollution of methane and the like are hidden, and the waste leakage liquid can pollute underground water resources for a long time; the method comprises the following steps of (1) burning garbage, wherein harmful gas dioxin generated in the burning process simultaneously generates fly ash, acid gas and the like; the organic compost has low volume reduction, weight reduction and harmless degree, the produced fertilizer has high salinity, high heavy metal content and long period, and the harmless treatment is not realized; the single anaerobic fermentation process has the advantages of more organic matter residues, long fermentation time and high operation energy consumption.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to thoroughly treat various types of garbage in organic garbage, ensuring that the treatment process cannot cause secondary pollution, fully utilizing process products, saving resources and reducing final treatment products so as to improve the treatment effect.
In order to achieve the purpose, the invention adopts the technical scheme that: an organic garbage treatment process comprises the following treatment steps:
firstly, crushing: crushing organic garbage into slurry;
step two, primary screening: flushing the slurry with flushing water to prepare slurry, separating out coarse materials in the slurry such as hard materials like glass, ceramics, shells, bones and the like and light flexible sundry residues like plastics, paper, cartons and the like by adopting a forced mechanical separation mode, manually sorting out solid organic residues in the hard materials and the light flexible sundries, and re-crushing the solid organic residues to prepare the slurry and leaving non-organic residues;
step three, fine screening: screening the primarily screened pulp to remove residues such as hard gravel, metal slag, finely crushed plastic, fibers and the like in the pulp;
fourthly, refining the bio-oil: the slurry after fine screening enters a biological oil refining system to carry out biological oil refining, the three-phase separation of the slurry is completed through the wet-heat hydrolysis and gravity type centrifugal separation system, the biological oil of a light liquid phase, the heavy phase water of a heavy liquid phase and the solid organic slag are separated, and the biological oil is recycled;
fifthly, microbial decomposition: putting the solid organic slag detected by primary screening and the solid organic slag generated by three-phase separation into a microbial decomposition system for microbial decomposition, wherein the microbial decomposition system adopts an aerobic and facultative bacteria decomposition process to decompose organic matters into carbon dioxide gas and decomposition liquid, trace difficultly decomposed matters remain in the microbial decomposition system, and the carbon dioxide gas is naturally discharged after deodorization treatment;
sixthly, carrying out microbial anaerobic fermentation: putting the heavy liquid phase water and the decomposition liquid into a microbial anaerobic fermentation system for fermentation, and performing microbial anaerobic fermentation on the heavy liquid phase water to form biogas and biogas slurry;
step seven, sewage treatment: the biogas slurry enters a sewage treatment system for treatment and then is brought into a sewage pipe network or is subjected to advanced treatment system treatment, and the clean water treated by the advanced treatment system can be reused as flushing water in the system;
step eight, desulfurization: desulfurizing the biogas, recycling the desulfurization product after the desulfurization product is treated by a biological sulfur recovery process, and desulfurizing the biogas to form clean biogas;
ninth, high-temperature steam heat supply: clean biogas is used for boiler combustion, and high-temperature steam generated by the boiler can be used for heating a bio-oil refining system and a microbial decomposition system;
the equipment involved in the whole process flow is monitored and controlled by an electric control system.
The washing water is warm water which is subjected to preheating treatment.
And carrying out harmless treatment on the residues screened out by the primary screening, the residues screened out by the fine screening, the difficultly decomposed substances remained in a microbial decomposition system and the biogas residues generated by anaerobic fermentation by adopting an oxygen-free oiling carbonization process.
The surplus part of the clean marsh gas can be used for generating electricity or preparing marsh gas natural gas, the electricity can be used by oneself or be merged into a power grid, and the marsh gas natural gas can be used by oneself or be merged into a natural gas pipe network.
Boiler combustion provides a heat source for thermal treatment of the rinse water.
The whole treatment process ensures that the treated objects are isolated from the outside, and the gas generated in the treatment process is collected in a centralized manner and is discharged after being treated by the deodorization system.
The invention has the beneficial effects that: the organic garbage treatment process disclosed by the invention has the advantages that the aerobic and anaerobic decomposition is combined with the anaerobic fermentation, so that the problem of water pollution caused by organic garbage landfill and the problem of air pollution caused by organic garbage incineration are fundamentally eliminated, no harmful substance is generated in the whole process, and harmlessness is realized; biological grease separated from organic garbage can be applied to chemical enterprises, biogas generated by fermentation has wide application, is clean and environment-friendly, and the sulfur recovered by the sulfur recovery process has high elemental purity, thereby realizing resource utilization; by adopting the aerobic and facultative decomposition process, the organic garbage can be reduced by more than 95 percent, and compared with the traditional organic anaerobic composting process, the method has the advantages of higher efficiency, more obvious reduction and reduction.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the organic waste is collected by a special collection vehicle, conveyed into a crusher through a spiral conveying pipe for crushing, and crushed into slurry.
The slurry is conveyed into a primary screening device for primary screening, the slurry is washed by washing water to be made into thin slurry, thick materials in the thin slurry, such as hard materials like glass, ceramics, shells, bones and the like and light flexible sundries residues like plastics, paper boxes and the like are separated by adopting a forced mechanical separation mode, solid organic residues in the hard materials and the light flexible sundries are manually sorted out, the solid organic residues are re-crushed to be made into the slurry, and non-organic residues are left.
The thick liquid after the primary screening is sieved to remove residues such as hard gravel, metal broken slag, finely-divided plastics, fibers and the like in the thick liquid, then the thick liquid after the fine screening enters a biological oil refining system to refine the biological oil, the three-phase separation of the thin liquid is completed through the wet-heat hydrolysis and gravity type centrifugal separation system, the biological oil in a light liquid phase, the heavy phase water in a heavy liquid phase and solid organic residues are separated, and the biological oil is recycled.
And (3) putting the solid organic slag detected by primary screening and the solid organic slag generated by three-phase separation into a microbial decomposition system for microbial decomposition, wherein the microbial decomposition system adopts an aerobic and facultative bacteria decomposition process to decompose the organic matters into carbon dioxide gas and decomposition liquid, trace difficultly decomposed matters remain in the microbial decomposition system, and the carbon dioxide gas is naturally discharged after deodorization treatment. The aerobic and facultative bacteria fermentation process can decompose organic matter fast and effectively, and the process has the features of being safe, environment friendly, low in power consumption, etc.
And (3) putting the heavy liquid phase water and the decomposition liquid into a microbial anaerobic fermentation system for fermentation, and performing microbial anaerobic fermentation on the heavy liquid phase water to form biogas and biogas slurry. The biogas slurry enters a sewage pipe network after being treated by a sewage treatment system or is treated by an advanced treatment system, and the clean water treated by the advanced treatment system can be reused as flushing water in the system.
The biogas is desulfurized, the desulfurization product is recycled after being treated by a biological sulfur recovery process, clean biogas is formed after the biogas is desulfurized and is used for boiler combustion, high-temperature steam generated by a boiler can be used for heating a biological oil refining system and a microbial decomposition system, and a heat source can be provided for preheating washing water. The surplus part of the clean marsh gas can be used for generating electricity or preparing marsh gas natural gas, the electricity can be used by oneself or be merged into a power grid, and the marsh gas natural gas can be used by oneself or be merged into a natural gas pipe network.
The equipment involved in the whole process flow is monitored and controlled by an electric control system.
And carrying out harmless treatment on the residues screened out by the primary screening, the residues screened out by the fine screening, the difficultly decomposed substances remained in a microbial decomposition system and the biogas residues generated by anaerobic fermentation by adopting an oxygen-free oiling carbonization process.
The whole treatment process ensures that the treated objects are isolated from the outside, and the gas generated in the treatment process is collected in a centralized manner and is discharged after being treated by the deodorization system.
Having described preferred embodiments of the present invention in detail, it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The organic garbage treatment process is characterized by comprising the following treatment steps:
firstly, crushing: crushing organic garbage into slurry;
step two, primary screening: washing the slurry with washing water to prepare slurry, separating coarse materials and light flexible impurities from the slurry in a forced mechanical separation mode, manually sorting solid organic residues from the coarse materials and the light flexible impurities, and leaving non-organic residues;
step three, fine screening: screening the primarily screened pulp to remove any residue of hard gravel, metal slag, finely crushed plastic and fiber in the pulp;
fourthly, refining the bio-oil: the slurry after fine screening enters a biological oil refining system to carry out biological oil refining, the three-phase separation of the slurry is completed through the wet-heat hydrolysis and gravity type centrifugal separation system, the biological oil of a light liquid phase, the heavy phase water of a heavy liquid phase and the solid organic slag are separated, and the biological oil is recycled;
fifthly, microbial decomposition: putting the solid organic slag detected by primary screening and the solid organic slag generated by three-phase separation into a microbial decomposition system for microbial decomposition, wherein the microbial decomposition system adopts an aerobic and facultative bacteria decomposition process to decompose organic matters into carbon dioxide gas and decomposition liquid, trace difficultly decomposed matters remain in the microbial decomposition system, and the carbon dioxide gas is naturally discharged after deodorization treatment;
sixthly, carrying out microbial anaerobic fermentation: putting the heavy liquid phase water and the decomposition liquid into a microbial anaerobic fermentation system for fermentation, and performing microbial anaerobic fermentation on the heavy liquid phase water to form biogas and biogas slurry;
step seven, sewage treatment: the biogas slurry enters a sewage treatment system for treatment and then is brought into a sewage pipe network or is subjected to advanced treatment system treatment, and the clean water treated by the advanced treatment system can be reused as flushing water in the system;
step eight, desulfurization: desulfurizing the biogas, recycling the desulfurization product after the desulfurization product is treated by a biological sulfur recovery process, and desulfurizing the biogas to form clean biogas;
ninth, high-temperature steam heat supply: clean biogas is used for boiler combustion, and high-temperature steam generated by the boiler can be used for heating a bio-oil refining system and a microbial decomposition system;
the devices involved in the steps are monitored and controlled through an electric control system.
2. The organic waste treatment process of claim 1, wherein the washing water is warm heat-treated water.
3. The organic waste treatment process according to claim 1, wherein the residues screened out by the primary screening, the residues screened out by the fine screening, the non-decomposable substances remaining in the microbial decomposition system and the biogas residues generated by anaerobic fermentation are subjected to harmless treatment by an anaerobic carbonization process.
4. The organic waste treatment process of claim 1, wherein the excess portion of the clean biogas can be used to generate electricity or to produce biogas, the electricity can be used by itself or incorporated into an electric grid, and the biogas can be used by itself or incorporated into a natural gas pipeline network.
5. The organic waste treatment process of claim 2, wherein the boiler combustion provides a heat source for the thermal treatment of the rinse water.
6. The organic waste disposal process of claim 1, wherein the disposal process of the organic waste disposal process ensures that the disposed matter is isolated from the outside, and the gas generated during the collective collection disposal process is discharged after being disposed by the deodorization system.
CN201710290569.XA 2017-04-28 2017-04-28 Organic garbage treatment process Active CN106984632B (en)

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CN108485927A (en) * 2018-04-13 2018-09-04 苏州爱绿环保科技有限公司 A kind of biogas production system and its method for producing biogas
CN110129191A (en) * 2019-04-10 2019-08-16 山东大学 A kind of efficient methane phase of waste scrap carton and recycling treatment system and its processing method

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CN1180896C (en) * 2003-06-15 2004-12-22 赵晓光 High-effective environment-protecting harmless refuse treatment method
CN101637778B (en) * 2009-08-25 2012-07-04 云南昆船设计研究院 Comprehensive processing technology of organic wastes
CN102268310A (en) * 2011-07-05 2011-12-07 董雅清 Method for preparing biomass fuel by utilizing food wastes
CN105057305B (en) * 2015-07-16 2017-06-23 中国科学院广州能源研究所 The broken slurrying of kitchen garbage continous way and the integrating device of component sorting
CN105057311B (en) * 2015-08-11 2017-05-31 陈丹 The Integrated Processing Unit and method of a kind of kitchen garbage
CN205551056U (en) * 2016-02-23 2016-09-07 上海金达坂宏齐新能源有限公司 Meal kitchen waste disposal system that combines after burning exhaust -heat boiler

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