CN102732564B - Method for comprehensive treatment on high-water content organic waste - Google Patents

Method for comprehensive treatment on high-water content organic waste Download PDF

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CN102732564B
CN102732564B CN201110085785.3A CN201110085785A CN102732564B CN 102732564 B CN102732564 B CN 102732564B CN 201110085785 A CN201110085785 A CN 201110085785A CN 102732564 B CN102732564 B CN 102732564B
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raw material
water
anaerobic
carrying
sorting
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CN102732564A (en
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沈炳国
朱华伦
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Ningbo Kaicheng Ecological Technology Co.,Ltd.
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NINGBO KASEEN ECOLOGY TECHNOLOGY Co Ltd
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    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/20Sludge processing
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The invention discloses a method for comprehensive treatment on high-water content organic waste. The method is characterized by comprising the following steps of 1, orderly carrying out sorting, crushing, homogenizing, pulping, separation and acidification of kitchen waste to obtain an anaerobic raw material having a pH value of 3.5 to 4.0, COD of 80 to 120kg/m<3>, TS of 6 to 8% and oil content less than or equal to 0.2%, 2, orderly carrying out sorting, crushing, pulping and acidification of agricultural product processing waste to obtain an anaerobic raw material having a pH value of 3.5 to 4.0, COD of 80 to 120kg/m<3> and TS of 6 to 8%, 3, orderly carrying out desilting and squeezing of livestock and poultry feces, wherein a water phase obtained by squeezing is directly used as an anaerobic raw material, crushing a solid phase obtained by squeezing, and carrying out pulping and acidification of the crushed solid phase to obtain an anaerobic raw material, and 4, pumping the anaerobic raw materials having COD of 80 to 120kg/m<3> and TS of 6 to 8% and obtained by the above steps into an anaerobic jar, carrying out anaerobic fermentation with gas stirring at a fermentation temperature of 52 to 58 DEG C at an oxidation-reduction potential of -180 to -350mV to obtain biogas for use of enterprises or residents, carrying out filter pressing of biogas residues, dividing the biogas residues into a solid phase for preparation of organic fertilizers and a water phase, carrying out water treatment on the water phase, and discharging the treated water phase. Through the method provided by the invention, multiple types of organic waste can be treated; an anaerobic fermentation gas generation rate is high; a sludge loading rate is high; and a biogas residue production amount is low.

Description

A kind for the treatment of process of comprehensive treating process castoff high in containing water
Technical field
The present invention relates to the method for one kind of multiple organic waste comprehensive treating processs.
Background technology
Along with the raising of Agricultural Industrialization Development and life in the countryside life, the organic waste pollution problem that particularly castoff high in containing water causes in villages and small towns has started to manifest.China's villages and small towns castoff high in containing water can be divided into following several types by its source difference: (1) fowl and animal excrement: comprise the movement of livestock and the poultry of livestock and poultry farm, 3,000,000,000 tons of annual production; (2) processing of farm products waste: comprise waste water waste material and the vegetables and fruits processing wastes such as slaughterhouse, brew-house, Milk Products Plant, 200,000,000 tons of annual production; (3) changing food waste: mainly from restaurant, school lunch service, enterprises and institutions dining room etc., along with the development of rural tourism industry, the total amount of rural area changing food waste is constantly soaring in recent years.These villages and small towns waste great majority are not used as the utilization of resources, but arbitrarily abandon or be discharged in environment, and ecotope is caused to very large pollution.The a large amount of ight soil of livestock industry does not obtain suitable processing, causes the loss of organonitrogen, phosphorus and serious environmental pollution.Processing of farm products waste is stacked the foul smell producing and is had a strong impact on Air quality, forms irreversible to the secondary pollution of atmosphere and water and soil on a large scale around.In changing food waste, directly feed pigs and cause " rubbish pig " problem, the mishandling easy formation of grease " sewer oil ".
This project is carried out industrialization disposal by multiple villages and small towns castoff high in containing water, the employing basis of pre-treatment as efficient anaerobic that become more meticulous, break through original biogas engineering and adopted single pattern of planting raw material, compare with traditional biogas engineering, have organic loading high, the residence time is short, and treatment capacity is large, factor of created gase is high, the few advantage of natural pond slag of generation.Industrial treatment organic waste anaerobic methane production is also recycled also in the starting stage, therefore this project is conducive to the structural readjustment of rural industry and development pattern transformation, by extensive style, to the transformation that becomes more meticulous, " 12 " New Chinese Rural construction that emphasis is mentioned in the works merges.To pushing away, alleviate energy shortage, promote sustainable development significant.
Summary of the invention
Technical problem to be solved by this invention is to provide the multiple organic waste of a kind of energy processing, anaerobic fermentation gas production rate is high, mud load rate is high and the treatment process of the comprehensive treating process castoff high in containing water that natural pond slag generation is little.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind for the treatment of process of comprehensive treating process castoff high in containing water, is characterized in that comprising the steps:
(1) after sorting, pulverizing, homogeneous, slurrying, separation, acidifying, to make successively pH be 3.5-4.0, COD 80~120kg/m to kitchen castoff 3, TS 6-8%, oil length≤0.2% anaerobism raw material;
(2) processing of farm products waste is made pH 3.5-4.0, COD80~120kg/m successively after sorting, pulverizing, slurrying, acidifying 3, TS 6-8% anaerobism raw material;
(3) fowl and animal excrement squeezes after desilting, and the water after squeezing, directly as anaerobism raw material, is made anaerobism raw material after solid phase slurrying after pulverizing, acidifying;
(4) anaerobically fermenting, pumps into anaerobic jar by the anaerobism raw material after aforementioned processing, makes charging COD 80~120kg/m 3, TS6-8%; 52~58 ℃ of leavening temperatures; Gas stirring; Redox potential-180~-350mV;
(5) biogas obtaining, for enterprise or resident, after the slag press filtration of natural pond, is divided into solid phase and removes fertilizer processed, and water qualified discharge after water treatment.
As improvement, described kitchen castoff sorting is to adopt twice sorting, and foreign material are recycled or sanitary landfill.
As improvement, described kitchen castoff separation is to adopt three phase separation, and isolated liquid phase, through oily water separation, obtains thick grease, carries out grease processing.
As improvement, the water processing of anhydrating again after converging after Ye Yu natural pond, the natural pond slag press filtration after described anaerobically fermenting.
As improvement, spray absorption after the gas sampling producing when described kitchen castoff is pulverized, rear discharge up to standard.
Finally, described step (1), (2), (3) in no particular order, any order combination.
Compared with prior art, the invention has the advantages that: mainly through classification pre-treating technology, improve organic content in material, through pulverizing slurrying, acidication technique, progressively change non-dissolved organic matter into dissolved organic matter, improve anaerobic fermentation gas production rate and mud load rate, reduced natural pond slag generation.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
(1) pre-treatment of kitchen castoff, twice separation step that changing food waste forms through one-level mechanical sorting, Mechanical Crushing, secondary mechanical sorting, guarantee that the foreign material such as plastic substance, vial, bamboo be wherein wooden, ceramic separate, foreign material clearance reaches more than 90%, macrobead organic materials is broken into the material relatively uniformly that size is no more than 25mm simultaneously, and callable foreign material are recycled, expendable foreign material transport sanitary filling field landfill to, greatly reduce like this labour intensity of workman's sorting, improved the quality of changing food waste; Then adopt pulverising step, this technology can pulverize to reach to sorting discharging the dimensional requirement of restriction.The size of material is down to below 3mm, is convenient to pipeline and carries, and, in crushing process, gas sampling is got up, by spray adsorption treatment, rear emission gases up to standard meanwhile, adopt clarifixator to carry out homogenization treatment to the material after pulverizing, carry out slurrying, like this, solid phase organic waste is processed through slurrying again, forms particle diameter 80-100 object particle, reduces three phase separation solid content, then pass through three phase separation, oily water separation step, adopt horizontal centrifuge to carry out light phase, heavy phase, Gu slag three phase separation, reduce the solid content in liquid phase, improve light phase grease ratio, reduce back segment oily water separation difficulty, through disc centrifuge, carry out oily water separation again, obtain the grease of water ratio≤3%, the liquid phase of oil length≤0.2%, because grease molecular weight is large and be difficult to acidifying, become small molecules volatile acid, anaerobically fermenting speed is low, therefore this technology can make anaerobically fermenting efficiency be improved, the thick grease of separating send grease processing, and water and solid phase are sent acidification step, project adopts segmentation anaerobic treatment method, acidication and methanation are separately carried out, material is through the equalizing tank acidifying that is hydrolyzed, progressively change non-dissolved organic matter into dissolved organic matter, mainly small molecules acid, buffering and dilution load impact and objectionable impurities, and produce the base-material that biogas provides high-quality for follow-up methanation, the condition of control condition acidication reaction, produce lipid acid, do not produce biogas as far as possible, finally making pH is 3.5-4.0, COD 80~120kg/m 3, TS 6-8%, oil length≤0.2% anaerobism raw material,
(2) pre-treatment of processing of farm products waste: processing of farm products waste, after the artificial removal of impurities of separation step, is pulverized, and particle diameter is less than 3mm, then through slurrying and acidifying, forms low pH 3.5-4.0, COD 80~120kg/m 3, the anaerobism raw material of TS 6-8%;
(3) pre-treatment of fowl and animal excrement: fowl and animal excrement squeezes after desilting, the water after squeezing, directly as anaerobism raw material, is made anaerobism raw material after solid phase slurrying after pulverizing, acidifying;
(4) anaerobically fermenting is processed, adopt modified version upflow anaerobic sludge blanket process (UASB) as anaerobic fermentation tank, regulate the ratio of changing food waste and processing of farm products waste and fowl and animal excrement, after making aforesaid three kinds of anaerobically fermenting mixing of materials, carbon-nitrogen ratio reaches 16~25: 1, COD, 80~120kg/m 3, TS6-8%, leavening temperature is controlled at 52-58 ℃, gas stirring, redox potential-180~-350mV, now microbial reproduction and production biogas efficiency are higher.High temperature anaerobic can be killed pathogenic microorganism, and gas producing efficiency is high, and the residence time is short.Acidication product is flowed into and mixes and contact with mud sludge blanket from anaerobic jar bottom by water distribution system, microorganism in mud is decomposed the organism in charging, it is converted into the final products such as methane and carbon dioxide, biogas is constantly emitted with micro-bubble form, in uphill process, constantly merges, form gradually larger bubble, feed liquid in tank is carried out to gas stirring, and natural pond liquid overflows from overflow port top, then discharges anaerobic jar.This process keeps strict anaerobic condition and pH value, is beneficial to the growth of methanobacteria; Degraded, stable organic matter, produce containing the more digestion gas of methane.Modified version UASB is equipped with malleation and negative-pressure protection device in top, has anti-blocking explosion-proof effect.Device gas deliverability makes castoff high in containing water after comprehensive treating process, high temperature anaerobic factor of created gase 4.0m 3biogas/m 3tank body d, methane content of bilogas 55-65%.
(5) biogas obtaining, for enterprise or resident, after the slag press filtration of natural pond, is divided into solid phase and removes fertilizer processed, and natural pond liquid after water and anaerobically fermenting converges, qualified discharge after water treatment.
Compared with prior art, the present invention mainly improves organic content in material through classification pre-treating technology, through pulverizing slurrying, acidication technique, progressively change non-dissolved organic matter into dissolved organic matter, improve anaerobic fermentation gas production rate and mud load rate, reduced natural pond slag generation.

Claims (6)

1. a treatment process for comprehensive treating process castoff high in containing water, is characterized in that comprising the steps:
1) after sorting, pulverizing, homogeneous, slurrying, separation, acidifying, to make successively pH be 3.5-4.0, COD 80~120kg/m to kitchen castoff 3, TS 6-8%, oil length≤0.2% anaerobism raw material;
2) processing of farm products waste is made pH 3.5-4.0, COD80~120kg/m successively after sorting, pulverizing, slurrying, acidifying 3, TS 6-8% anaerobism raw material;
3) fowl and animal excrement squeezes after desilting, and the water after squeezing, directly as anaerobism raw material, is made anaerobism raw material after solid phase slurrying after pulverizing, acidifying;
4) anaerobically fermenting, pumps into anaerobic jar by the anaerobism raw material after aforementioned processing, makes charging COD 80~120kg/m 3, TS6-8%; 52~58 ℃ of leavening temperatures; Gas stirring; Redox potential-180~-350mV;
5) biogas obtaining, for enterprise or resident, after the slag press filtration of natural pond, is divided into solid phase and removes fertilizer processed, and water qualified discharge after water treatment.
2. treatment process according to claim 1, is characterized in that kitchen castoff sorting is to adopt twice sorting, recycles foreign material or sanitary landfill.
3. treatment process according to claim 1, is characterized in that kitchen castoff separation is to adopt three phase separation, and isolated liquid phase, through oily water separation, obtains thick grease, carries out grease processing.
4. treatment process according to claim 1, is characterized in that after Ye Yu natural pond, the natural pond slag press filtration after anaerobically fermenting the water processing of anhydrating again after converging.
5. treatment process according to claim 1, sprays absorption, rear discharge up to standard after the gas sampling that it is characterized in that producing when kitchen castoff is pulverized.
6. treatment process according to claim 1, is characterized in that step 1), 2), 3) in no particular order, any order combination.
CN201110085785.3A 2011-04-07 2011-04-07 Method for comprehensive treatment on high-water content organic waste Active CN102732564B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103408190B (en) * 2013-07-31 2016-06-22 惠州市兴牧畜牧发展有限公司 Sewage disposal system
CN104230134A (en) * 2014-09-23 2014-12-24 浩蓝环保股份有限公司 Two-stage biochemical treatment method for kitchen waste
CN104907316B (en) * 2015-05-27 2017-11-24 北京世纪国瑞环境工程技术有限公司 A kind of kitchen garbage and civic feces total system and its method
CN110788107A (en) * 2019-09-23 2020-02-14 杭州泽灿环境科技有限公司 Kitchen waste treatment method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101073805A (en) * 2007-07-16 2007-11-21 陈五岭 Biological comprehensive treatment for food refuse
CN101519319A (en) * 2009-02-26 2009-09-02 农业部环境保护科研监测所 Method of synthetically processing animal excrement
CN101921809A (en) * 2010-07-28 2010-12-22 宁波开诚生态技术有限公司 Kitchen waste disposal method
CN101973684A (en) * 2010-11-03 2011-02-16 魏世锋 Separation and anaerobic fermentation technology of cow dung subject to acidification

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101073805A (en) * 2007-07-16 2007-11-21 陈五岭 Biological comprehensive treatment for food refuse
CN101519319A (en) * 2009-02-26 2009-09-02 农业部环境保护科研监测所 Method of synthetically processing animal excrement
CN101921809A (en) * 2010-07-28 2010-12-22 宁波开诚生态技术有限公司 Kitchen waste disposal method
CN101973684A (en) * 2010-11-03 2011-02-16 魏世锋 Separation and anaerobic fermentation technology of cow dung subject to acidification

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