KR19990007697A - Combined treatment of food waste and sewage sludge - Google Patents
Combined treatment of food waste and sewage sludge Download PDFInfo
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- KR19990007697A KR19990007697A KR1019980044327A KR19980044327A KR19990007697A KR 19990007697 A KR19990007697 A KR 19990007697A KR 1019980044327 A KR1019980044327 A KR 1019980044327A KR 19980044327 A KR19980044327 A KR 19980044327A KR 19990007697 A KR19990007697 A KR 19990007697A
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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
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2893—Particular arrangements for anaerobic reactors with biogas recycling
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
본 발명의 음식물쓰레기와 하수슬러지의 병합처리방법은 음식물 쓰레기로부터 철, 플라스틱, 비닐, 기타 이물질을 선별분리하고, 선별분리된 음식물쓰레기를 미생물에 의한 분해속도를 촉진시키도록 그 입경이 1∼2 mm 정도 이하가 되도록 파쇄하고, 파쇄된 음식물쓰레기를 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합처리하거나, 파쇄된 음식물쓰레기를 산발효시키고 pH를 조절한 후, 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합처리하는 방법에 관한 것이다.In the combined treatment method of food waste and sewage sludge of the present invention, the particle size is 1 to 2 so as to separate iron, plastic, vinyl, and other foreign substances from food waste, and to accelerate the decomposition rate of the separated food waste by microorganisms. After shredding to about mm or less, the shredded food waste is added to the concentration tank or anaerobic digestion tank of the sludge treatment process in the sewage treatment plant, or the shredded food waste is acidified and acidified and the pH of the shredded food waste is adjusted. The present invention relates to a method of incorporating treatment into a concentration tank or an anaerobic digestion tank of a sludge treatment process.
Description
본 발명은 유기성 폐기물 처리분야에 관한 것으로서, 특히 최근 들어 문제가 심각한 음식물쓰레기와 하수처리장에서 발생하는 슬러지의 병합처리에 관한 것이다. 보다 구체적으로, 본 발명은 음식물쓰레기를 선별하고 파쇄한 후, 파쇄된 음식물쓰레기를 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합 처리하거나, 파쇄된 음식물쓰레기를 산발효시키고 pH를 조절한 후, 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합 처리하는 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of organic waste treatment, and more particularly, to the combined treatment of sludge produced in food waste and sewage treatment plants, which has recently been a serious problem. More specifically, the present invention, after sorting and crushing food waste, the crushed food waste is added to the concentration tank or anaerobic digestion tank of the sludge treatment process in the sewage treatment plant or combined treatment, acidified fermentation of the crushed food waste and pH After adjusting, the present invention relates to a method of incorporating treatment into a concentration tank or an anaerobic digestion tank of sludge treatment in a sewage treatment plant.
음식물쓰레기는 거의 대부분이 유기물질이므로 매립 처분시 침출수와 지반의 안정화에 문제점을 안고 있다. 따라서 음식물쓰레기를 처리하기 위한 기존의 방법에는 크게 퇴비화, 사료화, 그리고 건조나 탈수를 통한 감량화 등으로 나눌 수 있다.Since most food wastes are organic materials, they have problems in stabilizing leachate and ground at disposal. Therefore, the existing methods for treating food waste can be divided into composting, feed, and weight reduction through drying or dehydration.
이들 기존의 방법에 대한 문제점을 살펴보면, 퇴비화는 아직까지 수요자의 거부감이 있을 뿐만 아니라 상당기간 이 퇴비를 사용하였을 때 퇴비중의 염분이 토양에 미치는 효과가 아직 검증되지 않았으며, 사료화는 사전에 분리작업을 철저히 하여야 하며, 그렇게 하였다 하더라도 최근에 음식물쓰레기로 만든 사료가 가축에게 좋은 먹이가 될 수 없음이 밝혀진 바 있다. 또한 건조나 탈수에 의한 감량화의 방법은 중량을 감소시킬 수는 있으나 분해 가능한 유기물의 최종적인 처리방법이 아니다.In view of the problems with these existing methods, composting has not only been rejected by consumers, but the effects of salinity in composting on soil have not yet been verified when the compost is used for a considerable period of time. Work has to be done thoroughly, and even then, it has recently been found that feed made from food waste cannot provide good food for livestock. In addition, the method of weight reduction by drying or dehydration can reduce the weight but is not the final treatment of degradable organic matter.
그리고 국내 하수처리장에서 발생하는 하수슬러지의 일반적인 특성을 살펴보면 유기물 함량이 적어 혐기소화후에도 유기물의 소화율이 그다지 높지 않은 실정이다.In addition, the general characteristics of sewage sludge generated in domestic sewage treatment plants are low in organic matter content, and the digestibility of organic matters is not very high even after anaerobic digestion.
본 발명자들은 음식물쓰레기와 하수슬러지를 비롯한 기존의 유기성 폐기물 처리방법에 대한 거부감이 없고, 경제적으로 처리할 수 있는 방법의 필요성을 인식하여 음식물쓰레기와 하수처리장에서 발생하는 하수슬러지를 병합 처리할 수 있는 방법을 개발하여 특허출원을 하였다(특허출원번호 제98-41348호). 본 발명은 상기 특허출원 발명의 또 다른 태양으로서 유기산 발효된 음식물쓰레기를 다른 방법으로 pH 조절할 수 있는 처리방법에 관한 것이다.The present inventors have no objection to existing organic waste treatment methods, such as food waste and sewage sludge, and recognize the necessity of a method that can be economically treated, so that the waste can be combined with food waste and sewage sludge generated in a sewage treatment plant. The method was developed and filed for patent application (Patent Application No. 98-41348). The present invention relates to a treatment method that can adjust the pH of the organic acid fermented food waste by another method as another aspect of the patent application invention.
본 발명의 목적은 음식물쓰레기와 하수슬러지를 함께 처리할 수 있는 방법을 제공하기 위한 것이다.An object of the present invention is to provide a method for treating food waste and sewage sludge together.
본 발명의 다른 목적은 음식물쓰레기의 선별 및 파쇄와 같은 간단한 전처리 설비과정을 거친 음식물쓰레기를 하수슬러지와 함께 혐기소화하는 방법에 관한 것이다.Another object of the present invention relates to a method for anaerobic digestion of food waste with sewage sludge which has undergone a simple pretreatment process such as sorting and crushing food waste.
본 발명의 또 다른 목적은 음식물쓰레기를 유기산 발효 후 하수슬러지와 병합 처리함으로써 유기물의 감량화를 극대화할 수 있는 방법을 제공하기 위한 것이다.Still another object of the present invention is to provide a method for maximizing the reduction of organic matter by treating food waste with organic sewage sludge after fermentation.
본 발명의 또 다른 목적은 음식물쓰레기를 유기산 발효 후 하수슬러지와 병합 처리함으로써 메탄 가스를 다량 발생시킬 수 있고, 다량 발생된 메탄 가스를 연료로서 사용할 수 있는 방법을 제공하기 위한 것이다.Still another object of the present invention is to provide a method in which a large amount of methane gas can be generated by treating food waste with organic sewage sludge after fermentation with organic acid, and using the generated methane gas as a fuel.
본 발명의 또 다른 목적은 유기산 발효된 음식물쓰레기의 pH를 분뇨, 정화조 폐액, 혐기소화조의 상징수, 또는 이들의 혼합액으로 조절할 수 있는 음식물쓰레기와 하수슬러지의 병합처리방법을 제공하기 위한 것이다.It is another object of the present invention to provide a method for treating food waste and sewage sludge which can adjust the pH of organic acid-fermented food waste with manure, septic tank waste liquid, symbolic water of anaerobic digestion tank, or a mixture thereof.
본 발명의 또 다른 목적은 하수처리장의 하수슬러지 처리시설에 부가하여 적은 비용으로 음식물쓰레기를 병합처리할 수 있는 장치를 제공하기 위한 것이다.Still another object of the present invention is to provide an apparatus capable of combining and treating food waste at low cost in addition to the sewage sludge treatment facility of a sewage treatment plant.
본 발명의 상기의 목적 및 기타의 목적들은 하기 설명되는 본 발명에 의하여 모두 달성될 수 있다.The above and other objects of the present invention can be achieved by the present invention described below.
이하 첨부된 도면을 참고로 본 발명의 내용을 하기에 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the contents of the present invention.
도 1은 본 발명에 따른 음식물쓰레기와 하수슬러지의 개략적인 병합처리방법을 도시한 공정도이다.1 is a process chart showing a schematic merge processing method of food waste and sewage sludge according to the present invention.
본 발명의 음식물쓰레기와 하수슬러지의 병합처리방법은 음식물 쓰레기로부터 철, 비닐, 기타 이물질을 선별 분리하고, 선별 분리된 음식물쓰레기를 미생물에 의한 분해속도를 촉진시키도록 그 입경이 1∼2mm 정도 이하가 되도록 파쇄하고, 파쇄된 음식물쓰레기를 산발효시키고 pH를 조절한 후, 하수처리장에서의 슬러지 처리과정의 농축조 또는 혐기소화조에 투입하여 병합처리하는 방법에 관한 것이다.In the combined treatment method of food waste and sewage sludge of the present invention, the particle diameter is 1 to 2 mm or less so as to separate iron, vinyl, and other foreign substances from food waste, and to accelerate the decomposition rate of the separated food waste by microorganisms. After the crushed food wastes, acidified fermentation of the crushed food waste and adjusting the pH, it relates to a method of incorporating into the concentration tank or anaerobic digestion tank of the sludge treatment process in the sewage treatment plant.
산발효된 음식물쓰레기의 pH를 조절하기 위하여 분뇨, 정화조 폐액, 혐기소화조의 상징수, 또는 이들의 혼합액을 사용한다. 메탄생성균의 활동에 적합한 pH는 6.8∼7.2 정도이기 때문에, 적절한 양의 분뇨, 정화조 폐액, 혐기소화조의 상징수, 또는 이들의 혼합액을 사용하며, 그 사용량은 이 기술분야에서 통상의 지식을 가진 자에 의하여 용이하게 실시될 수 있다.To adjust the pH of acid-fermented food waste, manure, septic tank waste liquid, symbolic water of anaerobic digestion tank, or a mixture thereof is used. Since the pH suitable for the activity of methane-producing bacteria is about 6.8 to 7.2, an appropriate amount of manure, septic tank waste liquid, symbolic water of anaerobic digestion tank, or a mixture thereof is used, and the amount thereof is used by those skilled in the art. It can be easily carried out by.
혐기성 소화공정은 고농도 유기성 폐기물을 산소가 없는 상태에서 다양한 미생물군이 메탄가스와 이산화탄소, 그리고 최종적인 안정한 생성물로 분해하는 공정이라 할 수 있다.The anaerobic digestion process is a process in which a high concentration of organic waste is decomposed into methane gas, carbon dioxide, and finally a stable product in the absence of oxygen.
대개 혐기성 분해반응은 ⅰ) 가수분해 단계, ⅱ) 산생성 단계, ⅲ) 메탄생성 단계로 구분하지만, 가수분해와 산생성 단계를 합하여 산생성 단계, 그리고 메탄생성 단계와 함께 2단계로 나누기도 한다. 각 단계에 대한 반응은 다음과 같다.Usually anaerobic digestion is divided into two stages, i) hydrolysis, ii) acid production, and methane production, but both hydrolysis and acid production are combined with acid production and methane production. . The reaction for each step is as follows.
산생성 단계:Acid Generation Steps:
유기물질 + H2O → 유기산(Acetate, Propionate, Butyrate, 등)Organic matter + H 2 O → organic acid (Acetate, Propionate, Butyrate, etc.)
메탄생성 단계:Methane Generation Steps:
유기산(Acetate, Propionate, Butyrate, 등) + H2→ CO2+ CH4 Organic acids (Acetate, Propionate, Butyrate, etc.) + H 2 → CO 2 + CH 4
위의 두 단계 반응을 다음과 같이 하나의 식으로 표현할 수 있다.The above two-step reaction can be expressed in one equation as follows.
CnHaOb+ (n - a/4 -b/2)H2O → (n/2 - a/8 + b/4)CO2+ (n/2 + a/8 -b/4)CH4 C n H a O b + (n-a / 4-b / 2) H 2 O → (n / 2-a / 8 + b / 4) CO 2 + (n / 2 + a / 8 -b / 4 ) CH 4
위의 두 단계 반응을 한 반응조내에서 혐기분해시킬 때 첫단계인 산 생성시 중간생성물인 Acetate등의 축적으로 pH가 떨어지면서 메탄생성균의 활동에 저해작용을 일으킨다. 산생성 단계에서는 고분자 상태의 유기물질이 빠른 시간안에 효과적으로 가수분해 과정을 거쳐 유기산 형태로 전환된다. 대개 산 생성균의 활동에 적합한 pH는 5.7∼6.5 이고, 메탄 생성균의 활동에 적합한 pH는 6.8∼7.2 정도로 알려져 있다.When the above two-stage reaction is anaerobic in one reactor, the pH decreases due to accumulation of intermediate product, Acetate, during the first stage of acid production, which causes methane-producing bacteria. In the acid production step, the organic material in the polymer state is converted into the organic acid form through the fast hydrolysis process effectively. Usually, the pH suitable for the activity of acid producing bacteria is known to be 5.7 to 6.5, and the pH suitable for the activity of methane producing bacteria is known to be about 6.8 to 7.2.
미생물의 활성을 적절히 유지하기 위한 알칼리도는 2,000mg/L (as CaCO3) 이상이 되는 것이 바람직하다. 대개 슬러지중에 어느 정도의 알칼리도가 있으나 많은 양의 음식물쓰레기를 혼합시에는 알칼리도 보충이 필요하다. 그리고 미생물의 최적활동 온도는 중온 소화영역이 34∼37℃, 고온 소화영역이 50∼57℃정도이며 일반적으로 중온 소화를 많이 실시하고 있다.The alkalinity for properly maintaining the activity of the microorganism is preferably 2,000 mg / L (as CaCO 3 ) or more. Although there is usually some alkalinity in the sludge, it is necessary to supplement alkalinity when mixing a large amount of food waste. The optimum temperature of microorganisms is about 34 ~ 37 ℃ for medium temperature digestion and about 50 ~ 57 ℃ for high temperature digestion.
또한 미생물의 성장에 필요한 물질로는 질소와 인이 있으며, 저해물질로는 중금속, 고농도의 암모니아, 염소, 나트륨 등이 있다.In addition, the materials required for the growth of microorganisms include nitrogen and phosphorus, and the inhibitors include heavy metals, high concentrations of ammonia, chlorine and sodium.
본 발명의 특징은 도 1에서 나타낸 바와 같이 음식물쓰레기를 선별 분리한 다음, 미생물 반응을 효과적으로 하기 위한 파쇄작업, 파쇄된 유기물을 빠른 시간내에 유기산 발효시키는 공정, 그리고 하수슬러지와 분해된 음식물쓰레기를 함께 혐기소화시키는 공정으로 구성된다.Characteristic of the present invention is to separate the food waste as shown in Figure 1, and then crushing operation for effective microbial reaction, a process for fermenting the organic acid in the crushed organic matter in a short time, and sewage sludge and decomposed food waste together Anaerobic digestion process.
선별공정에서는 음식물쓰레기중에 포함될 수 있는 철, 플라스틱, 비닐, 기타 이물질 등을 분리하여 후속공정에 무리가 가지 않도록 한다. 파쇄공정에서는 입경이 큰 음식물쓰레기를 입경 1∼2 mm 정도 이하로 작게 하여 미생물에 의한 분해속도를 촉진시켜준다.In the sorting process, iron, plastics, vinyl, and other foreign substances, which may be included in food waste, are separated to prevent excessive processing in subsequent processes. In the shredding process, food waste having a large particle size is reduced to about 1 to 2 mm or less to promote the decomposition speed by microorganisms.
유기산 발효는 본 발명의 가장 중요한 특징으로 거의 대부분이 유기물질인 음식물쓰레기를 빠른 시간내에 산발효시킨 후, 적정의 알칼리도를 유지하기 위하여 pH를 적절히 조절하여야 한다. 산발효에 필요한 시간은 0.5∼5일이 적당하다. 산발효된 음식물 쓰레기의 pH를 조절하기 위하여 분뇨, 정화조 폐액, 혐기소화조의 상징수, 또는 이들의 혼합액을 사용한다. 메탄생성균의 활동에 적합한 pH는 6.8∼7.2 정도이기 때문에, 적절한 양의 분뇨, 정화조 폐액, 혐기소화조의 상징수, 또는 이들의 혼합액을 사용하며, 그 사용량은 이 기술분야에서 통상의 지식을 가진 자에 의하여 용이하게 실시될 수 있다.Organic acid fermentation is the most important feature of the present invention. After almost acid-fermenting food waste, which is mostly organic matter, the pH should be appropriately adjusted to maintain an appropriate alkalinity. The time required for acid fermentation is suitable for 0.5 to 5 days. To adjust the pH of acid-fermented food waste, manure, septic tank waste liquid, symbolic water of anaerobic digestion tank, or a mixture thereof is used. Since the pH suitable for the activity of methane-producing bacteria is about 6.8 to 7.2, an appropriate amount of manure, septic tank waste liquid, symbolic water of anaerobic digestion tank, or a mixture thereof is used, and the amount thereof is used by those skilled in the art. It can be easily carried out by.
하수처리장에서 발생하는 하수슬러지를 처리하는 종래의 방법은, 하수슬러지를 농축조에서 농축시키고, 농축된 슬러지를 혐기소화조에서 처리하여 메탄 및 이산화탄소를 발생시키고, 고형물을 탈수하여 케이크로 만든다.Conventional methods of treating sewage sludge from sewage treatment plants are concentrated in sewage sludge, concentrated sludge is treated in an anaerobic digester to generate methane and carbon dioxide, and solids are dehydrated to make cakes.
본 발명에서는 슬러지 처리과정의 농축조 또는 혐기소화조에 음식물쓰레기를투입하여 병합처리한다. 도 1의 방법 1과 같이, 농축조에서 어느정도 산발효 효과가 있으면 음식물쓰레기를 파쇄후 바로 농축조로 투입한다. 도 1의 방법 2와 같이, 산발효되고 pH 조절된 음식물쓰레기를 사전에 하수슬러지와 균질상으로 하기 위하여 농축조로 투입하여 처리하기도 한다. 대개는 하수슬러지만 농축조로 유입되지만 음식물쓰레기도 함께 유입되는 상기 방법 1 및 2의 경우에는, 유입되는 음식물쓰레기의 TS(Total Solids) 함량과 혼합시의 농축 특성에 충분히 주의하여야 한다.In the present invention, the food waste is introduced into the concentration tank or anaerobic digestion tank of the sludge treatment process and merged. As shown in Method 1 of Figure 1, if there is some acid fermentation effect in the concentration tank, the food waste is put into the concentration tank immediately after crushing. As in Method 2 of FIG. 1, acid-fermented and pH-adjusted food waste may be treated by feeding into a concentration tank in order to homogenize with sewage sludge in advance. In the case of the above methods 1 and 2, which usually flow into sewage sludge but are also introduced with food waste, careful attention should be paid to the total solids (TS) content of the incoming food waste and the concentration characteristics upon mixing.
혐기소화조에서는 하수슬러지와 산발효된 음식물쓰레기 혼합액을 추가의 산발효를 거쳐 메탄 생성균이 최종산물인 메탄과 이산화탄소로 빨리 분해시킨다. 이미 앞 단계에서 유기산으로 분해되었을 뿐만 아니라 알칼리도도 회복되어 있으므로 메탄 생성균의 활동에는 큰 저해를 받지 않는다. 도 1의 방법 3과 같이, pH 조절되고 산발효된 음식물쓰레기를 혐기소화조에 투입한다. 도 1의 방법 4와 같이, 하수슬러지의 양에 비해 음식물쓰레기의 양이 아주 적을 경우에는 파쇄된 음식물쓰레기를 바로 혐기소화조로 투입하여 처리하기도 한다. 대개 음식물쓰레기와 하수슬러지의 적정혼합비율은 하수슬러지의 VS(Volatile Solids) 함량에 따라 1∼40% 정도가 적당하다.In the anaerobic digester, the mixture of sewage sludge and acid-fermented food waste is further acid-fermented to quickly decompose methane-producing bacteria into the final products, methane and carbon dioxide. Not only has it been decomposed into organic acid in the previous step, but its alkalinity is also restored, so there is no significant inhibition on the activity of methane-producing bacteria. As in method 3 of FIG. 1, pH-controlled and acid-fermented food waste is introduced into an anaerobic digester. As shown in Method 4 of FIG. 1, when the amount of food waste is very small compared to the amount of sewage sludge, the crushed food waste may be directly processed into an anaerobic digester. In general, the proper mixing ratio of food waste and sewage sludge is about 1 to 40% depending on the VS (Volatile Solids) content of the sewage sludge.
농축조 또는 혐기소화조에서 함께 음식물쓰레기와 하수슬러지를 처리하여 메탄 및 이산화탄소를 발생시키고, 고형물을 탈수하여 케이크로 만든다. 본 발명에서는 음식물쓰레기를 유기산 발효후 하수슬러지와 병합처리함으로써 메탄가스를 다량 발생시킬 수 있고, 다량 발생된 메탄가스를 연료로서 사용할 수 있는 장점을 갖는다. 특히 혐기소화에서는 온도를 35℃ 정도로 유지하여야 하며, 이를 위하여 에너지원이 필요하게 된다. 그러나 본 발명에서는 메탄가스를 다량 발생시킬 수 있기 때문에 그 메탄가스를 혐기소화조의 온도를 35℃ 정도로 유지하기 위한 에너지원으로 활용할 수 있다.Food waste and sewage sludge are treated together in a concentration or anaerobic digester to generate methane and carbon dioxide, and the solid is dehydrated to make a cake. In the present invention, by treating the food waste with the sewage sludge after fermentation of organic acid, a large amount of methane gas can be generated, and the generated methane gas can be used as a fuel. Especially in anaerobic digestion, the temperature should be maintained at about 35 ° C, which requires an energy source. However, in the present invention, since a large amount of methane gas can be generated, the methane gas can be used as an energy source for maintaining the temperature of the anaerobic digestion tank at about 35 ° C.
이상에서와 같이 본 발명은 음식물쓰레기와 하수슬러지를 혐기소화하여 병합 처리함으로써 음식물쓰레기를 효과적으로 감량화할 수 있으며, 특히 기존의 하수처리시설중 혐기소화설비를 이용할 경우 음식물쓰레기를 선별 및 파쇄의 간단한 전처리 설비 도입만으로도 음식물쓰레기를 효과적으로 처리할 수 있는 발명의 효과를 갖는다. 또한 혼합 처리함으로써 미생물 성장에 필요한 영양물질도 상호 보완할 수 있는 잇점이 있으며, 하수슬러지 단독으로 처리시나 혼합처리시 대부분의 유기물질이 분해되므로 혐기소화후의 최종슬러지 생성량은 큰 차이가 없다. 그리고 생성되는 메탄가스의 양은 혼합처리시 더 많은 양이 발생하므로 유용한 에너지원을 더 많이 얻을 수 있다. 또한 본 발명은 유기산 발효된 음식물쓰레기의 pH를 석회석, 중탄산칼슘, 중탄산소오다, 중탄산칼륨 등을 사용하지 않고, 분뇨, 정화조 폐액, 또는 혐기소화조의 상징수를 사용하기 때문에 처리비용을 절감할 수 있고 약품사용으로 인한 환경오염 문제를 야기시키지 않는다는 발명의 효과를 갖는다.As described above, the present invention can effectively reduce food waste by anaerobic digestion of food waste and sewage sludge, and in particular, when using anaerobic digestion facilities in existing sewage treatment facilities, simple pretreatment of sorting and crushing food waste. Only the introduction of the facility has the effect of the invention that can effectively treat food waste. In addition, there is an advantage that can be complemented by nutrients required for the growth of microorganisms by mixing, and since most of the organic materials are decomposed when treated with sewage sludge alone or mixed treatment, the final sludge production after anaerobic digestion is not significantly different. In addition, the amount of methane gas generated is greater in the mixing process, and thus more useful energy sources can be obtained. In addition, the present invention can reduce the treatment cost because the pH of the organic acid fermented food waste, without using limestone, calcium bicarbonate, sodium bicarbonate, potassium bicarbonate, and the like, manure, septic tank waste liquid, or symbolic water of anaerobic digestion tank It has the effect of the invention that it does not cause environmental pollution problems caused by the use of chemicals.
본 발명의 단순한 변형 내지 변경은 이 분야의 통상의 지식을 가진 자에 의하여 용이하게 실시될 수 있으며, 이러한 변형이나 변경은 모두 본 발명의 영역에 포함되는 것으로 볼 수 있다.Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100310480B1 (en) * | 1999-01-20 | 2001-11-02 | 고건 | Garbage Disposal System and Method Linked With Sewage Disposal Plant |
| KR100411414B1 (en) * | 2001-11-26 | 2003-12-18 | 주식회사 한화건설 | An anaerobic digestion method for organic waste |
| KR100802105B1 (en) * | 2007-08-23 | 2008-02-11 | 주식회사 삼올 | Method for fertilization treatment of byproduct accompanying digestion treatability of livestock excretion and device for using the same |
| CN110436711A (en) * | 2019-08-15 | 2019-11-12 | 北京云水浩瑞环境科技有限公司 | Handle the system and method for small towns rubbish and sewage |
| CN118085937A (en) * | 2024-04-19 | 2024-05-28 | 苏州中月鑫盛环保能源有限公司 | Preparation method of refuse derived fuel |
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| KR100407225B1 (en) * | 2000-10-17 | 2003-12-01 | 주식회사 일산 | An incinerating system for sludge and trash |
| KR100780384B1 (en) | 2006-05-18 | 2007-11-28 | 한밭대학교 산학협력단 | Organic Waste Treatment System |
| KR101029713B1 (en) * | 2010-11-15 | 2011-04-18 | 한밭대학교 산학협력단 | Apparatus for anaerobic digestion of livestock wastewater using ultrasound |
| KR101314336B1 (en) | 2011-08-18 | 2013-10-14 | 장희현 | Anaerobic Digestion System |
| KR101342982B1 (en) | 2012-09-05 | 2013-12-18 | 비케이환경종합건설 주식회사 | A bio gas manufacturing system using livestock excretions and food waste |
| KR20190135729A (en) | 2018-05-29 | 2019-12-09 | 에코바이오홀딩스 주식회사 | Biogas producing method |
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| JPS60137498A (en) * | 1983-12-23 | 1985-07-22 | Agency Of Ind Science & Technol | Anaerobic digesting method of organic waste |
| JPH0763719B2 (en) * | 1990-07-13 | 1995-07-12 | 大阪瓦斯株式会社 | Wastewater and sludge treatment methods |
| KR100274534B1 (en) * | 1997-11-21 | 2000-12-15 | 한상배 | Nitrogen and phosphorus removal methods with using fermented organic wastes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100310480B1 (en) * | 1999-01-20 | 2001-11-02 | 고건 | Garbage Disposal System and Method Linked With Sewage Disposal Plant |
| KR100411414B1 (en) * | 2001-11-26 | 2003-12-18 | 주식회사 한화건설 | An anaerobic digestion method for organic waste |
| KR100802105B1 (en) * | 2007-08-23 | 2008-02-11 | 주식회사 삼올 | Method for fertilization treatment of byproduct accompanying digestion treatability of livestock excretion and device for using the same |
| CN110436711A (en) * | 2019-08-15 | 2019-11-12 | 北京云水浩瑞环境科技有限公司 | Handle the system and method for small towns rubbish and sewage |
| CN118085937A (en) * | 2024-04-19 | 2024-05-28 | 苏州中月鑫盛环保能源有限公司 | Preparation method of refuse derived fuel |
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