KR20140004989A - Hybrid thermophilic anaerobic digestion process for the combined treatment of food-waste and pig-manure. - Google Patents

Hybrid thermophilic anaerobic digestion process for the combined treatment of food-waste and pig-manure. Download PDF

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KR20140004989A
KR20140004989A KR20120072628A KR20120072628A KR20140004989A KR 20140004989 A KR20140004989 A KR 20140004989A KR 20120072628 A KR20120072628 A KR 20120072628A KR 20120072628 A KR20120072628 A KR 20120072628A KR 20140004989 A KR20140004989 A KR 20140004989A
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high temperature
anaerobic
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methane fermentation
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최영철
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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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/2893—Particular arrangements for anaerobic reactors with biogas recycling
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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Abstract

The present invention relates to a hybrid thermophilic anaerobic digestion process for combined treatment of food waste and pig manure. The hybrid thermophilic anaerobic digestion process comprises the steps of: pulverizing food waste and injecting to an acid decomposing chamber for hydrolysis; mixing the processed liquid with pig-manure and injecting to an anaerobic high temperature digester after modulating the concentration of hydrogen ions moderately; supplying biogas, produced by a methane fermentation, to Taihan electric wire net after generating power with the biogas by a CHP; stailizing the high temperature digested water in a middle temperature digester for being used as a liquid fertilizer. Existing processes comprise one reacting step, while the anaerobic digestion comprises two steps of: acid fermentation, methane fermentation. The anaerobic digestion is performed by setting optimal reaction conditions for the first acid decomposing chamber and the second anaerobic high temperature digester. The temperature for the methane fermentation has been performed at middle temperatures (37 deg. C), while the present invention chose high temperatures (57 deg. C) which has high efficiency. Hence, the methane convert ratio of organic matters is twice more, which leads less residual of organic ingredients and sterilization of disease-causing bacteria and removal of weed-seeds in the residual. The present invention filters the middle temperature digested water and makes the solid matters into fertilizers, the filtered liquid is reused as a liquid fertilizer by an organic method. [Reference numerals] (1) Left food waste 100; (10) Solid-liquid separator; (2) Select; (3) Grinder; (4) Acid decomposer; (5) High temperature digester; (6) Middle temperature digester; (7) Filter; (8) Liquid fertilizer; (9) Livestock waste water 200; (AA) Merging treatment flow chart; (BB) Organic matter20; (CC) Biogas 8,000M3/day 5,000Kcal/M3; (DD) CHP(13) 1,000Kw/h 5,000Mwh/year HEAT 900toe/year; (EE,FF) Adulteration; (GG) Solid matter; (HH) Sawdust; (II) Organic liquid fertilizer; (JJ) Organic compost; (KK) Organic farming

Description

남은음식물 및 축산폐수를 병합처리하기 위한 복합고온혐기성소화공법 {Hybrid Thermophilic Anaerobic Digestion Process for the Combined Treatment of Food-waste and Pig-manure.}Hybrid Thermophilic Anaerobic Digestion Process for the Combined Treatment of Food-waste and Pig-manure.

본 발명이 속하는 기술분야는 남은음식물 및 축산폐수와 같은 고농도 유기탄소성분 및 총질소성분을 처리하고 재활용하는 고부하 고온혐기성소화, 바이오가스 생산 및 열병합발전기술이다.
The technical field of the present invention is a high load high temperature anaerobic digestion, biogas production and cogeneration technology for processing and recycling high concentration organic carbon components and total nitrogen components such as leftover food and livestock wastewater.

축산폐수는 상수원인 하천호소의 부영양화 및 녹조발생의 주요인으로 꼽히고 있다. 우리나라 축산폐수의 발생량은 총 오폐수의 1%수준이나, 유기탄소성분(BOD)기준 오염부하량은 15%로써, 고농도의 유기탄소, 인 및 질소를 함유한 오염원이다. 축산폐수의 문제는 주로 일천만두에 달하는 양돈농장에서 발생되는 돈분뇨이며, 그중에서도 대규모 고밀도 양돈농장에서 주로 채용되는 스러리돈사에서 배출되는 고농도 배출수는 악성 유기폐수로써, 현재 국내처리기술로는 아직 검증된 적절한 처리공법이 개발되지 않은 실정이다. 돈분뇨 및 축사 세척수등이 섞이어 배출되는 이폐수는 1차 고액분리를 거쳐 고형분은 퇴비화하고 분리액만을 폐수처리하게 되는데, 이때의 오염도는 유기탄소(CODcr): 50,000피피엠(PPM), 총질소(T-N): 6,000피피엠(PPM) 수준으로서, 일반생활하수의 약일백배에 달한다. Livestock wastewater is considered to be a major cause of eutrophication and green algae of river lakes. Domestic livestock wastewater is 1% of total wastewater, but pollution load based on organic carbon component (BOD) is 15%, which is a source containing high concentrations of organic carbon, phosphorus and nitrogen. The problem of livestock wastewater is pig manure from pig farms of 10 million pigs. Among them, the high concentration effluent discharged from Sluriddon, which is mainly employed in large-scale high-density pig farms, is a malignant organic wastewater. No suitable treatment method has been developed. Wastewater discharged by mixing pig manure and barn wash water is subjected to the first solid-liquid separation to compost solids and to treat only the separation liquid, and the pollution degree is organic carbon (CODcr): 50,000 PPM (PPM), total nitrogen. (TN): 6,000 mph (PPM), about one hundred times that of ordinary sewage.

축산폐수에 의한 수자원의 오염을 방지하기 위하여 건설된 축산폐수 공공처리장은 대부분 호기성공법을 채택하고 있다. 그러나 호기성공법을 채용시는 필수적인 전처리로서 고농도의 미세부유물을 응집침전 시켜 유기물 농도를 저하시키기 위하여 과량의 화학약품을 투여하며, 호기성처리를 위한 충분한 산소전달을 위하여는 많은 동력이 소요되어, 운전비의 과도한 상승은 물론 과도한 화학폐기물 발생으로 인한 2차오염의 우려마져 초래한다.     Most livestock wastewater treatment plants constructed to prevent water pollution by livestock wastewater adopt the aerobic success method. However, when adopting the aerobic method, as an essential pretreatment, an excessive amount of chemical is administered to coagulate and precipitate high concentrations of fine suspended solids to reduce organic matter concentration, and a lot of power is required for sufficient oxygen transfer for aerobic treatment. The rise is, of course, a concern for secondary pollution due to excessive chemical waste generation.

남은음식물의 처리는 그동안 건조, 사료화, 퇴비화의 세가지 주방향으로 처리되어 왔다. 그러나 건조는 연료비가 과다하고, 사료화는 효용성이 현저하게 낮음이 증명되었고, 퇴비는 우리나라의 식습관에 기인한 높은 염분함량 등의 결함으로 비료로서의 수요가 저조하여, 세 방법 공히 경제성이 없어 실패한 상태이다.     The remaining foods have been treated in three main directions: drying, feeding and composting. However, drying has proved to be excessively low in fuel costs and feed efficiency is very low, and compost has failed due to lack of economic efficiency due to low demand for fertilizer due to defects such as high salinity due to Korean food habits. .

돈분뇨의 마리당 배출량은 10리터/일로서 인간의 약10배에 달하며 고농도의 질소 및 인을 함유한다. 이들은 농사에 필요한 영양소로써, 돈분뇨를 약6개월간 저장하여 안정화시키면 양질의 액비가 됨으로, 옛부터 농사에 유용하게 사용되어 왔다. 그러나 전세계적으로 양돈방식이 고밀도 기업화함으로써, 양돈농장에서 배출되는 축산폐수는 주변하천을 부영양화시킬 뿐만 아니라, 돈분뇨의 장기간 저장시에 발생되는 악취와 메탄가스에 의한 온실효과 또한 심각한 문제로 전문가들에 의하여 부각되었다. 따라서 돈분뇨는 우리나라 뿐만이 아니라, 유럽, 미국, 등 세계 여러지역에서, 날로 확산되는 환경문제로 대두되어, 환경당국과 단체들의 관심을 고조시킴으로써 여러나라에서 양돈농장의 규모나 건설, 축분뇨의 유통에 대한 규제를 불러일으키고 있는 실정이다.           Swine manure emissions are 10 liters / day, approximately 10 times that of humans, and contain high levels of nitrogen and phosphorus. These are nutrients necessary for farming, and when manure is stored and stabilized for about 6 months, it becomes a good liquid fertilizer, and has been used for farming since ancient times. However, due to the high density of pig farming in the world, the livestock wastewater discharged from pig farms not only eutrophizes the surrounding streams, but also the odor and methane gas greenhouse effect caused by long-term storage of pig manure. Was highlighted. Thus, manure is emerging as an environmental problem that is spreading not only in Korea but also in Europe, the United States, and other parts of the world. The interests of environmental authorities and organizations have raised interest in the scale, construction and distribution of hog farms The situation is causing a regulation.

따라서 남은음식물 및 축산폐수를 미세부유물의 제거 없이 처리하여, 생성가스로 열과 전기를 생산하는 고효율 혐기성공법의 개발은 환경보전 및 대체에너지 개발을 동시에 실현하기 위하여 시급히 요청되는 현안이라 할 것이다.
Therefore, the development of a high-efficiency anaerobic method for treating the remaining food and livestock wastewater without removing the fine flotation and producing heat and electricity as the generated gas is an urgent issue required to simultaneously realize environmental conservation and alternative energy development.

1) 남은음식물과 축산폐수 단독으로는 메탄발효를 활성화 시킬 수 없으며, 그 원인은;   1) Leftovers and livestock wastewater alone cannot activate methane fermentation, because of;

(가) 축산폐수는 암모니아함량이 많아 독성으로 인하여 메탄균의 활성이 저하되며, (나) 남은음식물은 산패로 인한 낮은 수소이온농도(PH) 때문에, 직접 메탄소화조에 투입하면 높은 수소이온농도(PH)가 필요한 메탄발효의 활성을 저해한다.(A) The livestock wastewater has ammonia content, and the activity of methane is lowered due to its toxicity. (B) The remaining foods have high hydrogen ion concentration when directly put into the methaking tank due to low pH PH) inhibits the required methane fermentation activity.

남은음식물과 축산폐수를 적정비율로 사전에 혼합 중화하여 적합한 성상으로 고온소화조에 투입하여 메탄발효를 활성화시키면 고효율로 바이오가스를 생산할 수가 있는 것이다. If leftover food and livestock wastewater are mixed and neutralized in advance at an appropriate ratio and put into a high temperature digestion tank with suitable properties, activating methane fermentation can produce biogas with high efficiency.

1) 남은음식물은 파쇄하여 메탄발효조에 투입하기전에 산분해조에 투입하여 산분해조에 적합한 낮은 수소이온농도(PH)를 유지함으로서 고효율로 가수분해시킨다.         1) The remaining foods are crushed and put into an acid digestion tank before being put into the methane fermentation tank to maintain high hydrogen ion concentration (PH) suitable for the acid digestion tank to hydrolyze them with high efficiency.

2) 메탄발효 온도는 종래의 중온법(섭씨37도)이 아닌 고효율인 고온법(섭씨57도)을 채용하여, 반응온도가 10도 상승시 반응속도는 2배로 늘어나므로, 중온법의 4배로 반응속도를 증가시키고, 유기탄소의 메탄전환율도 2배로 증가시키며, 메탄발효수 내의 병원균의 소독 및 잡초씨의 제거도 완전하게 이루어져서, 중온소화조에서 메탄발효를 종결시키고 안정화되어 고액분리한 액비와 퇴비를 유기농법 비료로 안전하게 사용케 한다.         2) The methane fermentation temperature adopts the high-efficiency high-temperature method (57 degrees Celsius) instead of the conventional mesophilic method (37 degrees Celsius). Increasing the reaction rate, doubling the conversion rate of organic carbon to methane, disinfecting pathogens in methane fermentation water and removing weed seed completely, terminating methane fermentation and stabilizing liquid fertilizer and compost in the medium-temperature digestion tank Safely use as organic fertilizer.

3) 메탄발효반응이 활성화되면 유기탄소의 바이오가스 전환율이 향상하고, 바이오가스 생산량이 증가하며, 메탄가스 함량이 향상되어, 생성되는 바이오가스를 열병합발전기 (Combined Heat Power-generator: CHP)에 의하여 전기 또는 열로 전환하고, 열은 고온소화조의 가열수요를 충족시키고, 전기는 자체 폐수처리공정의 동력수요량을 충당하고, 잉여분은 한전송전망에 연계 판매 한다.         3) When the methane fermentation reaction is activated, biogas conversion of organic carbon is improved, biogas production is increased, methane gas content is increased, and the generated biogas is collected by a combined heat power generator (CHP). It converts into electricity or heat, heat meets the heating demand of the high temperature digester, electricity covers the power demand of its wastewater treatment process, and the surplus is sold in conjunction with the transmission prospect.

1) 남은음식물과 축산폐수가 메탄발효의 활성화로 효율적으로 병합처리된다.1) Leftover food and livestock waste water are efficiently combined with the activation of methane fermentation.

2) 고온소화조에서 소독되고, 중온소화조에서 안정화된 메탄발효소화수를 여과하여 고형물은 퇴비화하고, 여액은 안전한 유기농 액비로 재활용한다..2) The methane-validated water sterilized in the high temperature digestion tank is filtered and the solids are composted and the filtrate is recycled into a safe organic liquid fertilizer.

3) 메탄발효의 활성화로 대체에너지인 바이오가스 생성이 증대된다.
3) The activation of methane fermentation increases the production of biogas, an alternative energy.

[도 1]은 남은음식물 및 축산폐수를 병합처리하기 위한 복합고온혐기성소화공법의 공정도이다.   1 is a process chart of the combined high temperature anaerobic digestion method for processing the leftover food and livestock wastewater.

별첨[도 1]에 의하여 상세히 설명하면;If described in detail by the appendix [Fig. 1];

(1)남은음식물 호파 내에 저장된 남은음식물을 (2)선별 콘베이어로 배출하여 금속 수저 및 비닐 등 협잡물을 선별해 내고, (3)파쇄기로 투입하여 파쇄 또는 분쇄를 하여 교반식 밀폐 (4)산분해조로 투입하여, 섭씨30도~40도에서 24시간 체류시켜 교반하여 산성조건하에서 가수분해한다. 산분해조에서 생성된 탄산가스는 배출하고, 산분해수는, (9)축산폐수 저류조에서 배출되어 (10)고액분리기에서 협잡물을 제거한 축산폐수 분리액과 적정비율로 혼합하여 (5)고온소화조로 투입한다. (5)고온소화조에서는 유입수를 수소이온농도 6~8, 섭씨30~80도에서 10~30일간 체류시켜 교반하여 메탄발효시켜 함유된 유기탄소를 메탄을 주성분으로한 바이오가스로 전환한다. 생성된 바이오가스는 (11)바이오가스조에 저장되었다가 (12)가스정화기에서 정화하여 (13)열병합발전기(CHP)에 연료로 공급하여, 발전된 전기는 폐수처리공정 자체수요를 충당하고 잉여전기는 한전송전망에 쌍방향 전력적산계를 통하여 연계 공급되며, 회수열은 (5)고온소화조의 가열에 사용된다. 고온소화수는 (6)중온소화조로 유입되어 섭씨20~40도로 1~10일간 유지한후, 병원균과 잡초씨가 제거되고 가스발생이 안정화된 중온소화수는 (7)여과기로 유입되어 여과하여, 여과된 고형물은 퇴비화시키고, 여액은 (8)액비저장조로 이송되어 안전한 유기농 비료로 재활용된다. (1) Remaining foods stored in the leftover food hopper (2) Discharge the remaining foods into the sorting conveyor to sort out the metal cutlery and vinyl, etc., and (3) Crush them into a crusher to grind or grind them. The solution is added to a bath, stirred at 30 ° C. to 40 ° C. for 24 hours, stirred and hydrolyzed under acidic conditions. The carbon dioxide gas produced in the acid cracking tank is discharged, and the acid cracking water is discharged from the livestock wastewater storage tank and (10) mixed with the livestock wastewater separation solution from which the condensate is removed from the solid-liquid separator at an appropriate ratio (5) Put in. (5) In the high temperature digestion tank, the influent is stirred for 10 to 30 days at a hydrogen ion concentration of 6 to 8 and 30 to 80 degrees Celsius and stirred to convert the organic carbon contained into methane-based biogas. The biogas produced is (11) stored in a biogas tank, (12) purified from a gas purifier, and (13) supplied to the CHP as fuel, so that the generated electricity meets the needs of the wastewater treatment process itself. It is fed to the transmission prospective through a two-way power totalizer, and the recovered heat is used to heat the high temperature digester. (6) High temperature digested water is introduced into the medium temperature digestion tank and maintained at 20 to 40 degrees Celsius for 1 to 10 days, after which pathogenic bacteria and weed seeds are removed and gas generation is stabilized, (7) The filtered solids are composted and the filtrate is transferred to the (8) liquid storage tank and recycled as a safe organic fertilizer.

(1) 남은음식물 호파 (8) 액비 저장조
(2) 선별 콘베이어 (9) 축산폐수 저류조
(3) 파쇄기 (10) 협잡물 고액분리기
(4) 혐기성 산분해조 (11) 바이오가스 저장조
(5) 혐기성 고온소화조 (12) 바이오가스 정화기
(6) 혐기성 중온소화조 (13) 바이오가스 열병합발전기
(7) 여과기 (14) 자동교반식 퇴비장(1) Leftover Food Hopper (8) Liquid Baths
(2) Separation conveyors (9) Livestock wastewater storage tanks
(3) crushers (10) contaminant solid-liquid separators
(4) anaerobic acid digestion tanks (11) biogas storage tanks
(5) Anaerobic High Temperature Digester (12) Biogas Purifier
(6) anaerobic deuterium (13) biogas cogeneration
(7) Filter (14) Agitated Manure

Claims (1)

남은음식물과 축산폐수를 병합처리하여 고온메탄발효공정으로 바이오가스를 생산하고, 소화수를 액비로 재활용하는 공법으로서;
가) 남은음식물은 분쇄하여 교반식 밀폐 산분해조에서, 섭씨10~50도로 유지하고, 1~10일간 혐기성 가수분해 처리하여 산분해수는 고온소화조로 유입되고,
나) 산분해수 중량 1에 대하여 축산폐수는 1~10을 혼합하고, 이때 수소이온농도(PH)는 6~8을 유지하며, 고온소화조에서, 섭씨50~80도로 유지하여, 5~20일간 고온혐기성 메탄발효한후, 소독된 고온소화수는 중온소화조로 유입되어,
다) 중온소화조로 유입된 소화수는 섭씨20~40도로 1~10일간 유지되어 안정화된후, 혐기성소화수는 여과기로 여과하여 고형물은 퇴비화하고, 여액은 저장하여 안전한 액비로 재활용하며,
라) 생성된 바이오가스는 열병합발전기(CHP)의 연료로 사용하고, 열병합발전기에서 생성되는 전기는 자체수요 및 한전송전망에 공급하고, 회수열은 고온소화조 가열에 사용하는,
혐기성 산분해, 고온혐기성 메탄발효, 중온혐기성 메탄발효 및 열병합발전의 일련의 복합다단공정을 특징으로 하는 남은음식물과 축산폐수의 병합처리공법.A method of combining the leftover food and livestock wastewater to produce biogas through a high-temperature methane fermentation process and recycling the digested water to liquid ratio;
A) The remaining food is ground and maintained in a stirred closed acid digestion tank, maintained at 10 to 50 degrees Celsius, and anaerobic hydrolysis treatment is carried out for 1 to 10 days.
B) The livestock wastewater is mixed with 1-10 with respect to the weight of acid-decomposed water 1, and the hydrogen ion concentration (PH) is maintained at 6-8, and maintained at 50-80 degrees Celsius in a high temperature digester for 5-20 days. After high temperature anaerobic methane fermentation, the sterilized high temperature digested water flows into the medium temperature digestion tank,
C) The digested water introduced into the medium temperature digestion tank is maintained at 20 to 40 degrees Celsius for 1 to 10 days and then stabilized.The anaerobic digested water is filtered through a filter to compost solids, and the filtrate is stored and recycled into a safe liquid ratio.
D) The generated biogas is used as fuel for the CHP, the electricity generated from the cogeneration generator is supplied to the self-demand and the transmission prospects, and the recovered heat is used for heating the high temperature digester.
Combined treatment of leftover food and livestock wastewater, characterized by a series of multi-stage processes of anaerobic acid decomposition, high temperature anaerobic methane fermentation, mesophilic anaerobic methane fermentation and cogeneration.
KR20120072628A 2012-07-04 2012-07-04 Hybrid thermophilic anaerobic digestion process for the combined treatment of food-waste and pig-manure. KR20140004989A (en)

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CN104291438A (en) * 2014-08-25 2015-01-21 杭州清城能源环保工程有限公司 Method and system for producing biogas through two-stage anaerobic processing of high-concentration waste
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Publication number Priority date Publication date Assignee Title
CN104291438A (en) * 2014-08-25 2015-01-21 杭州清城能源环保工程有限公司 Method and system for producing biogas through two-stage anaerobic processing of high-concentration waste
CN106630522A (en) * 2016-12-28 2017-05-10 民勤县旺亨种猪繁育有限公司 Method for producing biogas by using pig slurry of pig farm
KR101977701B1 (en) 2017-11-15 2019-05-13 주식회사 포스코건설 Apparatus for treating anaerobic digestion of organic waste and method thereof
CN108641921A (en) * 2018-07-19 2018-10-12 诸暨市绿净节能环保科技有限公司 A kind of domestic organic garbage processing system and method
KR102189290B1 (en) * 2019-12-11 2020-12-09 주식회사 하나코젠 Gas mixing control system for bio gas combined heat power generator
CN111517564A (en) * 2020-04-15 2020-08-11 黑龙江省农业科学院畜牧兽医分院 Method for treating and utilizing sewage of farm
CN112010512A (en) * 2020-09-14 2020-12-01 王芝林 Pig manure and urine fermentation tank for pig farm
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