KR101003482B1 - Disposal method of high concentration organic matter waste water - Google Patents

Disposal method of high concentration organic matter waste water Download PDF

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KR101003482B1
KR101003482B1 KR20080087440A KR20080087440A KR101003482B1 KR 101003482 B1 KR101003482 B1 KR 101003482B1 KR 20080087440 A KR20080087440 A KR 20080087440A KR 20080087440 A KR20080087440 A KR 20080087440A KR 101003482 B1 KR101003482 B1 KR 101003482B1
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sludge
anaerobic digestion
facility
wastewater
high concentration
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KR20100028413A (en
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이정규
이현욱
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이정규
주식회사 윌텍
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

본 발명은 고농도 유기성 폐수의 처리방법에 관한 것으로, 더욱 상세하게는 음식물쓰레기, 도축폐수, 하수슬러지, 매립지 침출수와 같은 고농도 유기성 폐수를 혐기성소화설비(20)에 유입하여 폐수에 포함된 유기물을 분해하고, 상기 혐기성소화설비(20)를 거친 소화여액을 고도처리설비(30)로 유입하여 질소 및 인을 제거하며, 상기 혐기성소화설비(20)에서 발생한 메탄가스는 가스저장설비(22)로 회수하여 에너지화함에 있어서, 상기 혐기성소화설비(20) 및 고도처리설비(30)에서 발생한 슬러지를 슬러지저장조(50)로 회수하여 가용화장치(60)로 가용화 한 후, 상기 가용화 한 슬러지를 혐기성소화설비(20)로 유입함과 아울러 상기 가용화 한 슬러지를 고도처리설비(30)의 반응조에 선택적으로 공급함으로써, 혐기성소화설비(20)의 메탄가스 발생량을 증진하여 폐수의 에너지화를 극대화할 수 있도록 한 고농도 유기성 폐수의 처리방법에 관한 것이다.The present invention relates to a method for treating high concentration organic waste water, and more particularly, to decompose organic matter contained in the waste water by introducing high concentration organic waste water such as food waste, slaughter waste water, sewage sludge, landfill leachate into the anaerobic digestion facility 20. In addition, the digestive filtrate passed through the anaerobic digestion system 20 is introduced into the advanced processing facility 30 to remove nitrogen and phosphorus, and the methane gas generated in the anaerobic digestion system 20 is recovered to the gas storage facility 22. In the energy conversion, the sludge generated in the anaerobic digestion equipment 20 and the advanced processing equipment 30 is recovered by the sludge storage tank 50, solubilized by the solubilization device 60, and the solubilized sludge is anaerobic digestion equipment. In addition to the flow into the (20) and by selectively supplying the solubilized sludge to the reactor of the advanced processing equipment (30), by increasing the amount of methane gas generated in the anaerobic digestion equipment (20) One relates to a processing method for high-concentration organic waste water so as to maximize the number of energizing.

폐수, 혐기성, 호기성, 고도처리, 가용화, 슬러지, 오니, 메탄가스 Wastewater, anaerobic, aerobic, advanced treatment, solubilization, sludge, sludge, methane gas

Description

고농도 유기성 폐수의 처리방법{DISPOSAL METHOD OF HIGH CONCENTRATION ORGANIC MATTER WASTE WATER}Treatment method of high concentration organic wastewater {DISPOSAL METHOD OF HIGH CONCENTRATION ORGANIC MATTER WASTE WATER}

본 발명은 고농도 유기성 폐수의 처리방법에 관한 것으로, 특히 음식물쓰레기, 도축폐수, 하수슬러지, 매립지 침출수와 같은 고농도 유기성 폐수에 포함된 유기물을 혐기성소화설비로 분해한 후, 상기 폐수를 고도처리설비로 유입하여 폐수에 포함된 질소 및 인을 제거함에 있어서, 상기 혐기성소화설비 및 고도처리설비에서 발생한 슬러지를 저장하여 가용화장치로 파괴한 다음 혐기성소화설비의 혐기성 미생물의 먹이 및 탄소원으로 공급함으로써, 혐기성소화설비에서 발생하는 메탄가스의 발생량을 증진하여 고농도 유기성 폐수의 에너지화를 극대화할 수 있도록 한 고농도 유기성 폐수의 처리방법에 관한 것이다.The present invention relates to a method for treating high concentration organic wastewater, and particularly, after decomposing organic matter contained in high concentration organic wastewater such as food waste, slaughter wastewater, sewage sludge, landfill leachate into an anaerobic digestion facility, and then treating the wastewater with an advanced treatment facility. In the removal of nitrogen and phosphorus contained in the waste water by inflow, by storing the sludge generated in the anaerobic digestion and advanced processing equipment, solubilizing the sludge and supplying it to the feed and carbon source of anaerobic microorganisms of the anaerobic digestion equipment, anaerobic digestion The present invention relates to a method for treating high concentration organic wastewater, which can maximize energy generation of high concentration organic wastewater by increasing the amount of methane gas generated in the facility.

일반적으로 폐수의 생물학적 처리는 호기성 처리와 혐기성 처리로 나눌 수 있는데, 호기성 처리는 호기성 미생물의 증식작용에 의해 폐수 중의 유기물을 분해하여 무기화하는 것으로, 최종산물의 에너지 준위가 낮고, 반응이 빠르며, 생물의 에너지 효율이 좋기 때문에 국내에 가장 보편적으로 이용되고 있다.In general, biological treatment of wastewater can be divided into aerobic treatment and anaerobic treatment. Aerobic treatment is to decompose and mineralize organic matter in wastewater by aerobic microbial growth, resulting in low energy level, fast reaction, and biological Because of its energy efficiency, it is most commonly used in Korea.

이하 호기성 처리의 일반적인 처리공정을 도 1을 참고하여 살펴보면, 침사시설에서 1차 물리적으로 처리된 폐수는 유량조정조를 거쳐 폭기조로 유입되고, 폭기조로 유입된 폐수의 오염물질과 부유물은 호기성 미생물에 의하여 응집하여 플록(floc)을 형성하며, 상기 오염물질이 응집된 폐수는 침전조로 유입하여 슬러지를 침전시킨 후, 상징수는 소독방류조를 거쳐 방류하는 한편 침전된 슬러지 중 일부(반송슬러지)는 폭기조에서 필요로 하는 미생물원으로 반송함과 아울러 나머지 일부(잉여슬러지)는 탈수장치를 거쳐 외부로 반출한다.Hereinafter, referring to FIG. 1, a general treatment process of aerobic treatment is carried out to the aeration tank through the flow control tank, and the wastewater introduced into the aeration tank is polluted by the aerobic microorganisms. Flocculates to form floc, and the condensed wastewater flows into the settling tank to settle the sludge, and the supernatant is discharged through the disinfection tank while some of the precipitated sludge (bounce sludge) is aerated. In addition to being returned to the microorganisms required by the company, the remaining part (surplus sludge) is taken out through a dehydration device.

한편, 상기 탈수장치에 의하여 케이크 형태로 탈수된 잉여슬러지는 최종적으로 해양투기, 소각, 매립과 같은 방법으로 처리하는데, 상기와 같은 잉여슬러지 처리방법의 경우 환경오염 등 상당한 문제점을 야기함에 따라, 잉여슬러지를 감량할 수 있는 다양한 형태의 가용화장치가 국내외에서 개발되어 실용화되고 있다.On the other hand, the excess sludge dehydrated in the form of a cake by the dewatering device is finally treated by a method such as ocean dumping, incineration, landfill, the surplus sludge treatment method as described above causes a considerable problem such as environmental pollution, surplus Various types of solubilizers capable of reducing sludge have been developed and put into practice at home and abroad.

상기 슬러지 가용화장치에 대하여 도 2를 참고하여 좀 더 살펴보면, 가용화장치는 생물학적 폐수처리시설에서 발생한 슬러지의 80%이상이 유기물로 이루어져 미생물에 의해 물과 이산화탄소로 분해할 수 있다는 것에서 착안한 것으로, 침전조로부터 잉여슬러지를 유입하여 미생물의 먹이가 될 수 있도록 파괴한 다음 폭기조로 유입하도록 하는바, 상기 슬러지의 파괴 방법에는 기계적 파쇄, 수열반응, 압력, 초음파 등을 이용한 물리적 처리와, 오존이나 수산화나트륨을 이용한 화학적 처리 및 호열미생물을 이용한 생물학적 처리가 있고, 이러한 처리방법을 개별적 또는 복합적으로 병행하여 슬러지를 파괴하도록 한 가용화장치들이 공지되어 있다.Looking at the sludge solubilizing device in more detail with reference to Figure 2, the solubilizing device is conceived from the fact that more than 80% of the sludge generated in the biological wastewater treatment facility consists of organic matter can be decomposed into water and carbon dioxide by microorganisms, sedimentation tank The excess sludge is introduced into the aeration tank, and the sludge is introduced into the aeration tank. The sludge destruction method includes mechanical crushing, hydrothermal reaction, pressure, and ultrasonic treatment, and ozone or sodium hydroxide. There are chemical treatments used and biological treatments using thermophilic microorganisms, and solubilizers are known which allow sludge destruction in combination with these treatments individually or in combination.

그러나 상기와 같은 종래 가용화장치의 경우, 고가의 설비비를 소요하는데 비하여 호기성 처리공정에서 발생하는 슬러지를 감량하는 것 이외의 다른 목적으로 사용되지 않는 한계가 있었다.However, in the case of the conventional solubilizing device as described above, there is a limit that it is not used for other purposes other than reducing the sludge generated in the aerobic treatment process compared to the expensive equipment cost.

이하 일반적인 폐수의 생물학적 처리에 있어 혐기성 처리에 대하여 도 3을 참고하여 살펴보면, 혐기성 처리는 저류조에 저장된 폐수를 무산소 상태의 협기성소화설비에 유입하여 혐기성 미생물의 작용에 의해 폐수에 포함된 유기물을 가수분해하여 유기산을 생성하고 최종적으로 가스화하는 것으로, 소화가스인 메탄가스는 가스저장설비로 회수하여 에너지화하고, 소화여액은 통상의 수처리설비로 후처리 한 다음 방류하며, 소화슬러지는 건조설비를 거쳐 퇴비화시설로 반출한다.Anaerobic treatment in the biological treatment of the general wastewater with reference to Figure 3, anaerobic treatment is the wastewater stored in the storage tank flows into the anaerobic anaerobic digestion equipment to the organic matter contained in the wastewater by the action of anaerobic microorganisms The organic acid is decomposed to form and finally gasified. Methane gas, which is digested gas, is recovered and gasified by gas storage facility, and digested filtrate is post-treated with a conventional water treatment facility and discharged, and digested sludge is passed through a drying facility. Take it out to the composting facility.

상기와 같은 혐기성 처리방법은, 고농도 유기성 폐수를 효율적으로 처리할 수 있고, 슬러지 발생량이 적음과 아울러 발생한 슬러지에 질소와 인 및 부식질이 풍부하여 퇴비로 사용하기 적합하며, 소화가스로 발생하는 메탄가스를 에너지화할 수 있는 장점이 있다.The anaerobic treatment method as described above is capable of efficiently treating high concentration organic wastewater, having a low amount of sludge and abundant nitrogen, phosphorus, and humus in the generated sludge, which is suitable for use as a compost. There is an advantage that can be energized.

그러나 기존의 혐기성 처리공정은, 음식물쓰레기, 도축폐수, 하수슬러지, 매 립지 침출수와 같은 고농도 유기성 폐수를 처리하는 것을 주된 목적으로 하여 사용되었을 뿐이고, 혐기성 소화과정에서 발생하는 메탄가스는 부산물을 회수하는 수준에 지나지 않았는바, 메탄가스의 발생량을 증진하여 폐수에 포함된 유기물을 보다 적극적으로 에너지화하지는 못하였다.However, the existing anaerobic treatment process is only used for the treatment of high concentration organic wastewater such as food waste, slaughter wastewater, sewage sludge, landfill leachate, and methane gas from anaerobic digestion process recovers by-products. As a result, the level of methane gas has not been increased, and the organic matter contained in the wastewater has not been actively energized.

본 발명은 고농도 유기성 폐수를 혐기성소화설비로 처리함에 있어서, 폐수의 처리과정에서 발생한 슬러지를 가용화 하여 혐기성 미생물의 먹이 및 혐기성소화설비의 탄소원으로 공급함으로써, 메탄가스의 발생량을 증진하여 폐수의 에너지화를 극대화하는 데 그 목적이 있는 것으로, 혐기성소화설비를 거친 폐수를 고도처리설비로 유입하여 폐수에 포함된 질소 및 인을 제거하도록 하되, 상기 혐기성소화설비 및 고도처리설비에서 발생한 슬러지를 가용화 하여 혐기성소화설비로 공급하도록 함과 아울러 상기 가용화 된 슬러지를 고도처리설비의 반응조에 선택적으로 유입할 수 있도록 한 고농도 유기성 폐수의 처리방법을 제공한다.In the present invention, in treating high concentration organic wastewater with an anaerobic digestion system, by solubilizing sludge generated during the treatment of wastewater and supplying it to the carbon source of anaerobic microorganisms and the anaerobic digestion plant, the amount of methane gas is increased to improve the energy of the wastewater. The purpose of the present invention is to maximize wastewater by introducing the wastewater that has undergone anaerobic digestion into an advanced treatment plant to remove nitrogen and phosphorus contained in the wastewater, but by solubilizing the sludge generated in the anaerobic digestion plant and the advanced treatment plant. The present invention provides a method for treating high concentration organic wastewater, which allows the supply of the solubilized sludge to the reactor of the advanced treatment facility.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 고농도 유기성 폐수의 처리방법은, 고농도 유기성 폐수를 혐기성소화설비 및 고도처리설비에 순차적으로 유입하여 폐수를 정화하되, 상기 혐기성소화설비에서 발생한 메탄가스를 가스저장설비로 회수하여 에너지화하는 것을 포함하는 폐수처리방법에 있어서, 상기 혐기성소화설비 및 고도처리설비에서 발생한 슬러지를 슬러지저장조로 회수하고, 상기 회수한 슬러지를 가용화장치로 유입하여 가용화 한 후, 상기 가용화 한 슬러지를 혐기성소화설비로 유입하며, 한편으론 상기 가용화 한 슬러지를 고도처리설비의 반응조에 선택적으로 공급할 수 있도록 한 고농도 유기성 폐수의 처리방법을 특징으로 한 다.In the method of treating high concentration organic wastewater according to the present invention for achieving the above object, the high concentration organic wastewater is sequentially introduced into the anaerobic digestion and advanced treatment facilities to purify the wastewater, but the methane gas generated in the anaerobic digestion facility In the wastewater treatment method comprising recovering and energizing a gas storage facility, the sludge generated in the anaerobic digestion facility and the advanced processing facility is recovered into a sludge storage tank, and the recovered sludge is introduced into a solubilizer and solubilized. The solubilized sludge is introduced into an anaerobic digestion system, and on the other hand, it is characterized by a method of treating high concentration organic wastewater, which allows the solubilized sludge to be selectively supplied to a reactor of an advanced treatment plant.

상기한 바와 같은 본 발명에 의하면, 고농도 유기성 폐수를 혐기성소화설비 및 고도처리설비로 순차적으로 유입하되, 상기 협기성소화설비와 고도처리설비에서 발생한 슬러지를 가용화 하여 혐기성 미생물의 먹이로 공급함으로써, 혐기성소화설비의 메탄가스 발생량을 증진하여 폐수의 에너지화를 극대화할 수 있는 효과가 있다. 또한 가용화 한 슬러지를 선택적으로 고도처리설비의 반응조에 탄소원으로 공급하여 메탄올과 같은 외부 탄소원에 대체함으로써 운전경비를 절감할 수 있다.According to the present invention as described above, the organic wastewater of high concentration is sequentially introduced into the anaerobic digestion and advanced processing facilities, solubilizing the sludge generated in the anaerobic digestion and the advanced processing equipment to feed the anaerobic microorganisms, anaerobic By increasing the amount of methane gas generated in the fire extinguishing system, it is possible to maximize the energyization of the wastewater. In addition, the operating cost can be reduced by selectively supplying solubilized sludge as a carbon source to the reactor of the advanced treatment plant and replacing it with an external carbon source such as methanol.

이하 본 발명의 바람직한 일 실시예에 따른 고농도 유기성 폐수의 처리방법을 도 4를 참고하여 상세히 살펴본다.Hereinafter, a method for treating high concentration organic wastewater according to an embodiment of the present invention will be described in detail with reference to FIG. 4.

본 발명은 음식물쓰레기, 도축폐수, 하수슬러지, 매립지 침출수와 같은 고농도 유기성 폐수를 저류조(10)에 저장하고, 상기 저장된 고농도 유기성 폐수를 혐기성소화설비(20)로 유입하여 폐수에 포함된 유기물을 혐기성 미생물로 분해한다. 이때, 상기 혐기성소화설비(20)는 통상의 회분식반응기, 전통식반응기, 혐기성접촉반응기, UASB반응기 등을 사용할 수 있으며, 본 발명은 상기와 같이 공지된 혐기성소화설비의 종류에 한정되지 않는다.The present invention stores the high concentration organic wastewater such as food waste, slaughter wastewater, sewage sludge, landfill leachate in the storage tank (10), and the stored high concentration organic wastewater into the anaerobic digestion facility (20) to anaerobic organic matter contained in the wastewater Decompose into microorganisms. At this time, the anaerobic digestion apparatus 20 may be used a conventional batch reactor, traditional reactor, anaerobic contact reactor, UASB reactor, etc. The present invention is not limited to the type of anaerobic digestion equipment known as described above.

그리고 혐기성 미생물에 의한 혐기성 소화과정은 공지된 바와 같이 폐수에 포함된 고분자 유기물이 통성혐기성균에 의해 가수분해되어 저분자화 되면서 유기산을 생성하고, 편성혐기성균의 작용에 의하여 유기산이 더욱 분해되어 최종 생성물인 소화가스를 발생시켜며, 상기 소화가스는 50~60%의 메탄가스를 포함한다.In the anaerobic digestion process by anaerobic microorganisms, as is known, the polymer organic matter contained in the wastewater is hydrolyzed by the anaerobic bacteria to produce low molecular weight organic acids, and the organic acid is further decomposed by the action of the combined anaerobes. Phosphorus digestion gas is generated, and the digestion gas contains 50 to 60% of methane gas.

상기와 같이 폐수에 포함된 유기물은 혐기성 소화과정을 거쳐 메탄가스로 분해되는데, 상기 혐기성소화설비(20)에서 발생한 메탄가스는 가스저장설비(22)로 유입한 다음 에너지화한다. 메탄가스의 에너지화는 메탄가스를 연소시켜 발전설비를 가동하고, 발전설비에서 생산된 전력은 자체 폐수처리시설의 운전에 사용함과 아울러 잉여전력을 외부에 공급하여 판매하는 것으로 가능하며, 또는 메탄가스를 응축하여 가스차량 등의 연료로 사용할 수도 있다.As described above, the organic matter contained in the waste water is decomposed into methane gas through an anaerobic digestion process, and the methane gas generated in the anaerobic digestion facility 20 is introduced into the gas storage facility 22 and then energized. Methane gas can be energized by burning methane gas to operate power generation facilities, and the power generated by the power generation facilities can be used for the operation of its own wastewater treatment facilities, and the surplus power can be supplied to the outside for sale. Can be used as fuel for gas vehicles and the like.

그리고 혐기성소화설비(20)에 의하여 유기물이 분해된 소화여액은 통상의 고액분리기(24)로 유입하여 소화여액에 포함된 고형물을 분리하되, 상기 고액분리기(24)에서 분리된 고형물은 퇴비화시설로 반출하는바, 상기 고형물에는 질소와 인이 풍부하여 퇴비화하여 사용하기에 적합하고, 한편으론 혐기성소화설비(20)에서 침전되지 않고 부유하는 고형물을 소화여액에서 미리 제거함으로써 이후에 있을 고도처리설비(30)의 부하를 줄여 운전을 용이하게 할 수 있다.The digested filtrate in which the organic matter is decomposed by the anaerobic digestion system 20 is introduced into the conventional solid-liquid separator 24 to separate the solids contained in the digested filtrate, and the solid separated in the solid-liquid separator 24 is composted. The solids are rich in nitrogen and phosphorus and are suitable for composting. On the other hand, the solids which do not settle in the anaerobic digestion system 20 and are suspended in the digested filtrate are removed in advance. Operation can be facilitated by reducing the load of 30).

상기 고액분리기(24)를 거친 소화여액은 고도처리설비(30)로 유입하여, 상기 혐기성소화설비(20) 및 고액분리기(24)에 의하여 분해되거나 제거되지 아니한 미세부유물, 용해성 잔류유기물, 착색물질과 함께 질소 및 인과 같은 영양 염류를 제거한 후, 여과기(40)를 거쳐 외부로 방류함으로써, 수질환경기준을 유지 달성하고 폐쇄성 수역의 부영양화를 방지한다.Digestion filtrate passed through the solid-liquid separator 24 is introduced into the advanced processing equipment 30, the fine flotation, soluble residual organic matter, coloring material that is not decomposed or removed by the anaerobic digestion equipment 20 and the solid-liquid separator 24 The nutrients, such as nitrogen and phosphorus, are removed together and discharged to the outside through the filter 40, thereby maintaining the water quality standards and preventing eutrophication of the closed water.

한편, 상기 고도처리설비(30)는 통상의 물리화학적 처리공법과 생물학적 처리공법 중에서 생물학적 처리공법을 적용함이 바람직하며, 공지의 생물학적 처리공법을 적용함에 있어서는 혐기조, 무산소조, 호기조를 기본구성으로 하는 A2/O계열(A2/O, DNR, KSBNR, HANT, KNR, KOMIAE 등)의 공법이나, 하나의 반응조에서 유입→반응→침전→배출→휴지 공정을 순차적으로 진행하는 SBR계열(Aqua-SBR, Omniflo-SBR, ICEAS, KIDEA, 선회와류식-SBR, PSBR 등)의 공법을 적용한 공지의 고도처리설비(30)를 사용한다.On the other hand, the advanced treatment facility 30 is preferably applied to the biological treatment method from the usual physical and chemical treatment method and biological treatment method, in the application of the known biological treatment method is based on anaerobic tank, anoxic tank, aerobic tank A2 / O series (A2 / O, DNR, KSBNR, HANT, KNR, KOMIAE, etc.) or SBR series (Aqua-SBR) Omniflo-SBR, ICEAS, KIDEA, Swirl Vortex-SBR, PSBR, etc.) is used.

그리고 상기 혐기성소화설비(20) 및 고도처리설비(30)에서 발생한 슬러지는 슬러지저장조(50)로 유입하여 저장한 후, 통상의 가용화장치(60)로 가용화 하는바, 상기 가용화장치(60)는 기계적 파쇄, 수열반응, 압력, 초음파, 오존, 수산화나트륨, 호열미생물 등을 이용한 공지의 가용화장치로서, 상기 슬러지저장조(50)로부터 유입한 슬러지를 미생물의 먹이가 될 수 있도록 파괴한다.And the sludge generated in the anaerobic digestion equipment 20 and the advanced processing equipment 30 is introduced into and stored in the sludge storage tank 50, and solubilized by a conventional solubilizer 60, the solubilizer 60 is As a known solubilization device using mechanical crushing, hydrothermal reaction, pressure, ultrasonic waves, ozone, sodium hydroxide, thermophilic microorganisms, and the like, the sludge introduced from the sludge storage tank 50 is destroyed to be a food for microorganisms.

그리고 상기 가용화장치(60)에 의하여 가용화 된 슬러지는 상기 혐기성소화설비(20)로 유입하여 혐기성 미생물의 먹이 및 탄소원이 될 수 있도록 하는바, 혐기성 소화에 있어 투입유기물의 C/N비(탄질소비) 및 C/P비(탄소인비)는 메탄발효를 잘하기 위한 중요한 요소로서, 상기 가용화 된 슬러지에 포함된 탄소는 혐기성 미생물의 에너지공급원이 되고, 질소와 인은 미생물의 아미노산, 단백질, 핵산 등의 형성요소로 중요한 영양원이 된다.The sludge solubilized by the solubilizer 60 is introduced into the anaerobic digestion facility 20 to be a feed and carbon source of anaerobic microorganisms, and the C / N ratio of the input organic matter in anaerobic digestion (carbonaceous consumption). ) And C / P ratio (carbon phosphorus ratio) is an important factor for methane fermentation well, carbon in the solubilized sludge is an energy source of anaerobic microorganisms, nitrogen and phosphorus are the amino acid, protein, nucleic acid, etc. As a forming factor, it becomes an important nutrient source.

한편, 혐기성 미생물의 반응은 C/N비와 C/P비의 영향을 받는데, 탄소 1g당의 가스가 발생하는 량으로 가장 활발하게 혐기성 반응이 일어나는 C/N비의 범위는 12~16이다. C/N 비가 적은 유기물은 질소가 충분히 이용될 수 없기 때문에 과잉의 질소가 암모니아로 변화하여 메탄발효 반응을 저해하게 되며, 인은 생체막과 ATP등의 생명현상에 불가결한 원소로서 100~500의 C/P비를 필요로 한다.On the other hand, the reaction of the anaerobic microorganism is affected by the C / N ratio and the C / P ratio, the amount of gas generated per 1g of carbon is the range of the C / N ratio that the most active anaerobic reaction is 12 ~ 16. Organic matters with a low C / N ratio cannot use enough nitrogen, and the excess nitrogen is changed to ammonia to inhibit the methane fermentation reaction. Phosphorus is an indispensable element for life phenomena such as biofilm and ATP. Requires / P ratio

그리고 상기 가용화장치(60)에 의하여 가용화 된 슬러지는 고도처리설비(30)의 반응조에 선택적으로 유입하도록 하는바, 상기와 같이 고도처리설비(30)의 반응조에 가용화 된 슬러지를 공급함으로써 외부로부터 고도처리설비(30)에 공급하는 메탄올을 대신하여 고도처리설비(30)에서 필요로 하는 탄소원으로 사용할 수 있다.And the sludge solubilized by the solubilizer 60 to selectively flow into the reactor of the advanced processing equipment 30, as described above by supplying solubilized sludge into the reactor of the advanced processing equipment 30 Instead of methanol supplied to the treatment facility 30, it can be used as a carbon source required by the advanced treatment facility 30.

따라서 상기와 같은 본 발명에 의하면, 혐기성소화설비(20) 및 고도처리설비(30)를 이용하여 고농도 유기성 폐수를 처리함에 있어, 처리과정에서 발생한 슬 러지를 가용화 하여 혐기성소화설비(20)로 공급함에 따라 메탄가스의 발생량을 증진하여 궁극적으로 폐수의 에너지화를 극대화할 수 있고, 한편으론 혐기성 소화여액의 상태에 따라 가용화 한 슬러지를 고도처리설비에 선택적으로 유입하여 폐수처리시설을 효율적으로 운용할 수 있다.Therefore, according to the present invention as described above, in treating high concentration organic wastewater using the anaerobic digestion facility 20 and the advanced treatment facility 30, solubilizing the sludge generated in the treatment process to supply to the anaerobic digestion facility (20). As a result, it is possible to maximize the energy generation of wastewater by increasing the amount of methane gas generated, and also to efficiently operate the wastewater treatment facility by selectively introducing the solubilized sludge into the advanced treatment facility according to the state of anaerobic digestion filtrate. Can be.

도 1은 일반적인 호기성 폐수처리시설을 나타내는 구성도1 is a block diagram showing a general aerobic wastewater treatment facility

도 2는 종래 가용화장치가 구비된 호기성 폐수처리시설을 나타내는 구성도2 is a block diagram showing an aerobic wastewater treatment facility equipped with a conventional solubilization device

도 3은 일반적인 혐기성 폐수처리시설을 나타내는 구성도3 is a block diagram showing a general anaerobic wastewater treatment plant

도 4는 본 발명에 따른 고농도 유기성 폐수처리시설을 나타내는 구성도4 is a block diagram showing a high concentration organic wastewater treatment facility according to the present invention

*** 도면의 주요 부분에 대한 부호의 설명 ****** Explanation of symbols for the main parts of the drawing ***

10: 저류조 20: 혐기성소화설비10: storage tank 20: anaerobic digestion system

22: 가스저장설비 24: 고액분리기22: gas storage facility 24: solid-liquid separator

30: 고도처리설비 40: 여과기30: advanced processing equipment 40: filter

50: 슬러지저장조 60: 가용화장치50: sludge storage tank 60: solubilizer

Claims (1)

저류조(10)에 저장된 고농도 유기성 폐수를 혐기성소화설비(20)로 유입하여 폐수에 포함된 유기물을 분해하고;Introducing a high concentration of organic wastewater stored in the storage tank 10 into the anaerobic digestion facility 20 to decompose organic matter contained in the wastewater; 상기 유기물이 분해된 소화여액을 고액분리기(24)로 유입하여 고형물을 분리하며;The digested filtrate from which the organic matter is decomposed is introduced into the solid-liquid separator 24 to separate the solids; 상기 고액분리기(24)를 거친 소화여액은 고도처리설비(30)로 유입하여 정화한 후, 여과기(40)를 거쳐 외부로 방류하되;The digested filtrate passed through the solid-liquid separator 24 is purified after entering the advanced processing equipment 30, and discharged to the outside through the filter 40; 상기 혐기성소화설비(20)에서 발생하는 메탄가스는 가스저장설비(22)로 유입하여 에너지화하고;Methane gas generated in the anaerobic digestion facility 20 is introduced into the gas storage facility 22 to be energized; 상기 고액분리기(24)에서 분리된 고형물은 퇴비화시설로 반출하며;The solid separated in the solid-liquid separator 24 is taken out to the composting facility; 상기 혐기성소화설비(20) 및 고도처리설비(30)에서 발생한 슬러지는 슬러지저장조(50)에 저장한 후, 그 슬러지를 가용화장치(60)로 유입하여 미생물의 먹이가 될 수 있도록 파괴하여 가용화하되;The sludge generated in the anaerobic digestion facility 20 and the advanced processing facility 30 is stored in the sludge storage tank 50, and the sludge is solubilized by being introduced into the solubilizer 60 so as to feed the microorganisms. ; 상기 가용화 한 슬러지는 혐기성소화설비(20)로 유입하여 미생물의 먹이 및 탄소원으로 활용함으로써 혐기성소화설비(20)의 메탄가스 발생량을 증진하여 폐수의 에너지화를 극대화함과 아울러;The solubilized sludge is introduced into the anaerobic digestion facility (20) to maximize the energyification of the wastewater by increasing the amount of methane gas generated in the anaerobic digestion facility (20) by utilizing as a feed and carbon source of the microorganisms; 다른 한편으론, 상기 가용화 한 슬러지를 외부 탄소원에 대체하여 고도처리설비(30)의 반응조에 선택적으로 공급함으로써 운전경비를 절감할 수 있도록 한 것을 특징으로 하는 고농도 유기성 폐수의 처리방법.On the other hand, the method of treating high concentration of organic wastewater, characterized in that the operating cost can be reduced by selectively supplying the solubilized sludge to an external carbon source and selectively supplying it to the reactor of the advanced treatment facility (30).
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