KR100920176B1 - Membrane separation appratus for the advanced treatment of nitrogen and phosphorus in wastewater - Google Patents

Membrane separation appratus for the advanced treatment of nitrogen and phosphorus in wastewater Download PDF

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KR100920176B1
KR100920176B1 KR1020070071085A KR20070071085A KR100920176B1 KR 100920176 B1 KR100920176 B1 KR 100920176B1 KR 1020070071085 A KR1020070071085 A KR 1020070071085A KR 20070071085 A KR20070071085 A KR 20070071085A KR 100920176 B1 KR100920176 B1 KR 100920176B1
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tank
wastewater
sewage
nitrogen
membrane separation
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KR20090007888A (en
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최송휴
정동환
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대한통운 주식회사
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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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • 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
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

본 발명은 유입된 하·폐수를 저장하여 일정량의 하·폐수를 후단에 공급하는 유량조정조와; 유량조정조로부터 공급되는 하·폐수내 협잡물을 2차 제거하는 드럼스크린과; 상기 유량조정조로 부터 하·폐수를 공급받고, 하·폐수에 존재하는 용존유기물이 호기성 미생물에 의해 분해되며, 동시에 유입 하·폐수내 암모니아성질소 및 아질산성질소의 질산화가 일어나 질소성분이 질산성질소의 형태로 전환되는 호기조와; 상기 호기조와 유량조정조로부터 하·폐수를 공급받고, 하·폐수는 다량의 질산성질소와 하·폐수내 함유되어 있는 소량의 질산성질소가 질소와 결합산소가 분리됨으로써 질소가스로 전환하여 대기중으로 방출되고, 탈질미생물이 활동하는데 필요한 유기탄소원은 유량조정조로부터 대량 그리고 호기조로부터 미량 함유된 하·폐수내 유기물로 충당하는 탈인ㆍ탈질조와; 상기 탈인ㆍ탈질조로부터 하·폐수와 미생물의 혼합액을 공급받고, 유기오염물질이 미생물의 먹이로서 소비되어 제거되고, 유입된 암모니아성 질소와 아질산성질소 성분은 호기성상태에서 질산화과정을 거쳐 질산성질소 성분으로 전환되며, 인 성분물질은 미생물에 의해 과잉섭취되어 제거되는 막분리호기조와; 상기 막분리호기조에 분리막프레임장치에 의해 고정된 분리막과; 상기 분리막 프레임장치에 연결되어 흡인압력에 의해 고액분리시켜 외부로 처리수를 방출하는 흡인펌프를 포함하여 이루어진 것을 특징으로 하는 침지식 막분리 고도처리 장치에 관한 것이다.

Figure R1020070071085

침지식막분리고도처리장치, 유량조정조, 호기조, 탈인ㆍ탈질조, 막분리호기조, 분리막, 슬러지농축저류조, 약품탱크, 흡인펌프, 산기장치, 공기발생기

The present invention provides a flow control tank for storing the introduced sewage and wastewater and supplying a predetermined amount of sewage and wastewater to the rear end; A drum screen for secondarily removing contaminants in the sewage and wastewater supplied from the flow adjusting tank; Sewage and wastewater are supplied from the flow control tank, and dissolved organic matter present in the wastewater and wastewater is decomposed by aerobic microorganisms, and at the same time, nitrification of ammonia nitrogen and nitrite nitrogen in the influent sewage and wastewater occurs. An aerobic tank converted to form; Sewage and wastewater are supplied from the aerobic tank and the flow control tank, and the wastewater is converted into nitrogen gas by separating a large amount of nitrate nitrogen and a small amount of nitrate nitrogen contained in the sewage and wastewater into nitrogen gas by separating nitrogen and combined oxygen. Organic carbon sources released and denitrified microorganisms are required to be dephosphorized and denitrified tanks covered with organic matter in sewage and wastewater contained in large quantities from flow control tanks and from aerobic tanks; The mixed solution of sewage / wastewater and microorganisms is supplied from the dephosphorization and denitrification tank, and organic pollutants are consumed and removed as food for microorganisms, and the introduced ammonia nitrogen and nitrite nitrogen components undergo nitrification in an aerobic state. A membrane separation tank which is converted into a nitrogen component and the phosphorus component is excessively ingested and removed by the microorganism; A membrane fixed to the membrane separation tank by a membrane frame device; It is connected to the separator frame device relates to an immersion type membrane separation advanced processing apparatus comprising a suction pump for separating the solid-liquid by the suction pressure to discharge the treated water to the outside.

Figure R1020070071085

Submerged Membrane Separation Advanced Treatment System, Flow Control Tank, Exhalation Tank, Dephosphorization / Denitrification Tank, Membrane Separation Tank, Separator, Sludge Concentration Storage Tank, Chemical Tank, Suction Pump, Dispersion Equipment, Air Generator

Description

침지식 막분리 고도처리 장치{Membrane separation appratus for the advanced treatment of nitrogen and phosphorus in wastewater}Membrane separation appratus for the advanced treatment of nitrogen and phosphorus in wastewater}

본 발명은 하·폐수를 처리할 수 있는 침지식 막분리 처리장치에 관한 것으로서, 더욱 상세하게는 하·폐수내에 존재하는 각종 부유물질 및 유기물질과 더불어 부영양화를 일으킬 수 있는 영양물질인 질소와 인을 동시에 높은 처리효율로 제거할 수 있는 침지식 막분리 고도처리 장치에 관한 것이다.The present invention relates to an immersion membrane separation apparatus capable of treating sewage and wastewater, and more particularly, nitrogen and phosphorus, which are nutrients that can cause eutrophication, along with various suspended substances and organic substances present in sewage and wastewater. The present invention relates to an immersion type membrane separation advanced processing apparatus capable of simultaneously removing high processing efficiency.

하·폐수를 처리하는 일반적인 침지식 막분리 활성슬러지공법은 침전조→ 스크린조→ 유량조정조 → 호기조 →막분리호기조 →처리수조의 공정순으로 이루어져 있다. 상기 공법은 오수내의 부유물질과 유기오염물질(BOD,COD)의 제거에는 탁월히 높은 제거율을 나타내고 있다.The general immersion membrane separation activated sludge method for treating sewage and wastewater consists of the following steps: sedimentation tank, screen tank, flow regulating tank, aerobic tank, membrane separation tank, and treatment tank. The method shows an excellent removal rate for the removal of suspended solids and organic pollutants (BOD, COD) in the sewage.

그러나 오수의 방류수수질기준이 강화되고 하·폐수내의 질소, 인에 대한 규제가 강화되어감에 따라 질소와 인의 적절한 처리대책이 필요하게 되었다. 그런데 이러한 침지식 막분리 활성슬러지공법으로는 질소, 인의 적절한 제거에 한계가 있다. 이는 질소의 경우 탈질에 의한 질소의 완전제거가 아닌 질산화만을 일으켜 오히려 수중 미생물이 흡수하기 좋은 형태로 변형시키며, 인의 경우는 미생물이 단지 미량만을 흡수하기 때문에 높은 인제거율을 기대할 수 없기 때문이다.However, as the effluent quality standards for sewage have been strengthened and the regulations on nitrogen and phosphorus in sewage and wastewater have been tightened, appropriate treatment measures for nitrogen and phosphorus have become necessary. However, there is a limit to the proper removal of nitrogen and phosphorus in the immersion membrane separation activated sludge method. This is because nitrogen does not completely remove nitrogen by denitrification, but only nitrification, and rather transforms it into a form that can be absorbed by microorganisms in water.

본 발명은 전술한 바와 같은 문제점을 해결하기 위한 것으로, 하·폐수내에 존재하는 부유물질과 유기오염물질(BOD, COD) 및 질소와 인을 동시에 높은 효율로 제거하고자 한다.The present invention is to solve the problems described above, and to remove the suspended solids and organic pollutants (BOD, COD) and nitrogen and phosphorus in the sewage and wastewater at the same time with high efficiency.

본 발명은 상기의 목적을 달성하기 위하여 유입된 하·폐수를 저장하여 일정량 하·폐수를 후단에 공급하는 유량조정조와; 상기 유량조정조로 부터 하·폐수를 공급받고, 하·폐수에 존재하는 용존유기물이 호기성 미생물에 의해 분해되며, 동시에 유입 하·폐수내 암모니아성질소 및 아질산성질소의 질산화가 일어나 질소성분이 질산성질소의 형태로 전환되는 호기조와; 상기 호기조 및 유량조정조로부터 하·폐수를 공급받고, 하·폐수는 다량의 질산성질소와 하·폐수내 함유되어 있는 소량의 질산성질소가 결합산소와 분리됨으로써 질소가스로 전환하여 대기중으로 방출되고, 탈질미생물이 활동하는데 필요한 유기탄소원은 유량조정조로부터 대량, 호기조로부터 미량 유입된 하·폐수내 유기물로 충당하는 탈인ㆍ탈질조와; 상기 탈인ㆍ탈질조로부터 하·폐수와 미생물의 혼합액을 공급받고, 유기오염물질이 미생물의 먹이로서 소비되어 제거되고, 미량의 암모니아성 질소와 아질산성질소 성분은 호기성상태에서 질산화과정을 거쳐 질산성질소 성분으로 전환되며, 인성분물질은 미생물에 의해 과잉섭취되어 제거되는 막분리호기조와; 상기 호기조와 막분리호기조 사이에는 막분리호기조의 하·폐수를 호기조로 반송시킬 수 있는 반송배관과: 상기 막분리호기조에 분리막프레임장치에 의해 고정된 분리막과; 상기 분리막 프레임장치에 연결되어 흡인압력에 의해 고액분리시켜 외부로 처리수를 방출하는 흡인펌프를 포함하여 이루어진 것을 특징으로 하는 침지식 막분리 고도처리 장치를 제공한다.The present invention provides a flow rate adjustment tank for supplying a predetermined amount of wastewater and wastewater to the rear end by storing the wastewater and the wastewater introduced to achieve the above object; Sewage and wastewater are supplied from the flow control tank, and dissolved organic matter present in the wastewater and wastewater is decomposed by aerobic microorganisms, and at the same time, nitrification of ammonia nitrogen and nitrite nitrogen in the influent sewage and wastewater occurs. An aerobic tank converted to form; Sewage / wastewater is supplied from the aerobic and flow rate adjusting tanks, and the sewage / wastewater is converted into nitrogen gas by separating a large amount of nitrate nitrogen and a small amount of nitrate nitrogen contained in the sewage and wastewater from the combined oxygen and released into the atmosphere. The organic carbon sources required for the denitrification of microorganisms include dephosphorization and denitrification tanks, which are covered with organic matter in the sewage and wastewater flowed in large quantities from the flow regulating tanks and aerobic tanks; The mixed solution of sewage and wastewater and microorganisms is supplied from the dephosphorization and denitrification tank, and organic pollutants are consumed and removed as food for microorganisms. A membrane separation aeration tank which is converted into a nitrogen component and the phosphorus substance is excessively ingested and removed by the microorganism; A conveying pipe capable of conveying the sewage / waste water of the membrane separation tank to the aerobic tank between the exhalation tank and the membrane separation tank; a separator fixed to the membrane separation tank by a membrane frame device; It is connected to the separator frame device provides a submerged membrane separation advanced processing apparatus comprising a suction pump for separating the solid-liquid by the suction pressure to discharge the treated water to the outside.

기존의 침지식막분리슬러지공법은 1차폭기조와 막분리호기조에서 유기오염물질(BOD,COD)과 부유물질만을 제거할 수 있는 반면에 본 발명에 따른 침지식 막분리 고도처리 장치는 호기조, 탈인ㆍ탈질조, 막분리호기조의 순으로 장치를 구축하여 탈인ㆍ탈질조내에서 유입수와, 호기조내 혼합액의 질산성질소성분을 탈질화시켜 제거하며 인성분을 용출시켜 후단의 막분리호기조내에서 미생물에 의해 과잉섭취시킴으로써 제거한다. 또한 막분리호기조내에 존재하는 미생물에 의해 유기오염물질(BOD,COD)가 제거되면 최종적으로 분리막에 의해 처리수와 고형물의 고·액 분리가 일어나 깨끗한 처리수를 생성하게 된다.Conventional immersion membrane separation sludge method can remove only organic pollutants (BOD, COD) and suspended solids in the primary aeration tank and membrane separation tank, whereas the immersion membrane separation advanced processing apparatus according to the present invention is aerobic, dephosphorization ㆍ Set up the device in the order of denitrification tank and membrane separation tank, and denitrification and removal of nitrate nitrogen components of inflow water and denitrification tank in dephosphorization tank, and eluting phosphorus component to microorganisms in the membrane separation tank Remove by excess ingestion. In addition, when organic contaminants (BOD, COD) are removed by the microorganisms present in the membrane separation tank, the separation membrane of the treated water and solids is finally generated to generate clean treated water.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 침지식막분리고도처리장치는 도 1에 도시된 바와 같이, 유량조정조(50) → 호기조(10) → 탈인ㆍ탈질조(20) → 막분리호기조(30) → 슬러지농축저류조(40)로 이루어진다.The immersion membrane separation advanced processing apparatus according to the present invention, as shown in Figure 1, the flow adjustment tank 50 → aeration tank 10 → dephosphorization, denitrification tank 20 → membrane separation aeration tank 30 → sludge concentration storage tank ( 40).

유량조정조(50)에 유입되는 하,폐수는 일반적인 침지식 막분리 처리장치와 마찬가지로 유량조 전단의 침사조에서 모래나 그릿 등의 비중이 높은 협잡물이 제거되고, 침사조 후단의 바 스크린과 오토바 스크린을 거쳐 조대협잡물이 제거된다.The sewage and wastewater flowing into the flow regulating tank 50 are removed from the sedimentation tank at the front of the flow tank with high specific gravity such as sand or grit. Coarse miscellaneous goods are removed through the process.

유량조정조(50)에는 레벨스위치가 일정수위를 감지하여 펌프를 작동시킴으로써 호기조(10)로 하·폐수를 공급하고, 필요에 따라 탈인ㆍ탈질조(20)로도 하·폐수를 분할공급한다. 즉 호기조(10)와 탈인ㆍ탈질조(20)로 하·폐수를 분할하여 공급할 수 있는 특징이 있다. 분할공급비는 하·폐수의 성상에 따라 조절할 수 있다. 하ㆍ폐수의 호기조로 분할 유입은 연속적으로 이루어지지 않을 수도 있다. 하ㆍ폐수의 유입이 호기조(10)로 연속적으로 이루어지지 않을 때에는 막분리호기조(30)로부터 호기조(10)로 반송되는 반송액의 유입 및 정지 시간비에 따라 유동적으로 조정 되어 질 수 있다. 즉 막분리호기조(30)로부터 호기조(10)로 반송액의 유입이 중단되는 시간에 호기조(10)에 하ㆍ폐수의 유입이 중단되어지며 호기조(10)로 반송액이 유입되는 시간에는 호기조(10)로 하ㆍ폐수유입도 이루어진다. 호기조(10)로 유입되는 하ㆍ폐수의 공급 및 정지 시간은 하ㆍ폐수의 성상에 따라 조절할 수 있다.The level switch senses a certain level of water and operates the pump to supply the wastewater and wastewater to the aeration tank 10, and separates the wastewater and wastewater into the dephosphorization and denitrification tank 20 as necessary. In other words, the waste water and the wastewater can be divided and supplied to the aeration tank 10 and the dephosphorization and denitrification tank 20. The split-supply costs can be adjusted according to the characteristics of the sewage and wastewater. Split inflow into the aerobic tank of sewage and wastewater may not be continuous. When the inflow of sewage and wastewater is not continuously made to the aerobic tank 10, it may be fluidly adjusted according to the inflow and stop time ratio of the conveyed liquid returned from the membrane separation aerobic tank 30 to the aerobic tank 10. That is, the inflow of wastewater and wastewater to the aerobic tank 10 is stopped at the time when the inflow of the carrier liquid from the membrane separation aeration tank 30 to the aerobic tank 10 is stopped, and the aerobic tank ( 10) Sewage and wastewater inflow are also made. Supply and stop time of the sewage and wastewater flowing into the aerobic tank 10 can be adjusted according to the properties of the sewage and wastewater.

호기조(10)와 탈인ㆍ탈질조(20)로 하·폐수를 공급하기 전에 하·폐수는 드럼스크린에 의해 다시 한번 걸려지게 된다. 미세여과 스크린은 미세한 메시 스크린을 원통형으로 제작한 것으로, 모터에 의해 회전시킴으로써 미세협잡물을 제거한다.Before supplying the wastewater to the exhalation tank 10 and the dephosphorization and denitrification tank 20, the wastewater and wastewater are once again caught by a drum screen. The microfiltration screen is made of a cylindrical mesh screen and is rotated by a motor to remove fine contaminants.

호기조(10)로 공급된 하·폐수는 후술하는 막분리호기조(30)로부터 반송되는 반송액과 혼합된다. 막분리호기조(30)로부터 호기조(10)로 반송되는 반송액은 인의 용출을 위하여 연속적으로 반송되는 것이 아니고 일정한 시간동안 공급되고 일정시간 동안 공급되지 않는다. 반송액의 공급과 정지의 시간비는 하ㆍ폐수의 성상에 따라 조절할 수 있다. 호기조(10)내의 하·폐수는 탈인ㆍ탈질조(20)로 자연유하방식으로 이송된다. 또한 호기조(10)내에는 호기조(10)의 외부에 설치된 공기발생기(120)와 연결된 산기장치(60)를 설치하여 공기를 충분히 공급받을 수 있다.The wastewater and wastewater supplied to the aerobic tank 10 are mixed with the conveyed liquid returned from the membrane separation aeration tank 30 described later. The conveyed liquid returned from the membrane separation aeration tank 30 to the aerobic tank 10 is not continuously conveyed for elution of phosphorus, but is supplied for a predetermined time and is not supplied for a predetermined time. The time ratio between the supply and stop of the conveyed liquid can be adjusted according to the properties of the sewage and wastewater. The sewage and wastewater in the aerobic tank 10 are transferred to the dephosphorization and denitrification tank 20 in a natural flow manner. In addition, the aerobic tank 10 may be provided with an air diffuser device 60 connected to the air generator 120 installed on the outside of the aerobic tank 10 to be sufficiently supplied with air.

탈인ㆍ탈질조(20)에서는 탈질반응에 의해 질소성 물질이 제거된다. 이는 호기조(10)로부터 유입되는 하·폐수와 미생물의 혼합액내의 다량의 질산성질소와 하·폐수내에 함유되어 있는 소량의 질산성질소가, 유리산소가 존재하지 않는 탈인ㆍ탈질조(20)로 유입되면서 탈인ㆍ탈질조(20)내 탈질미생물에 의해 결합산소와 분리됨으로써 질소가스(N2)로 전환되어 대기중으로 방출되기 때문이다. 이때 탈질미생물이 활동하는데 필요한 유기탄소원은 분할유입된 하·폐수내 유기물질과 호기조(10)로부터 유입된 하·폐수와 미생물의 혼합액내 유기물로부터 충당하게 된다. 수리학적 체류시간이 연장된 탈인ㆍ탈질조(20)에서는 탈질반응과 함께 인의 과잉방출이 일어난다. In the dephosphorization and denitrification tank 20, nitrogenous substances are removed by denitrification. This is a dephosphorization / denitrification tank 20 in which a large amount of nitrate nitrogen in the mixed solution of sewage and wastewater and microorganisms introduced from the aerobic tank 10 and a small amount of nitrate nitrogen contained in the wastewater and wastewater is free of oxygen. This is because the gas is separated from the bound oxygen by the denitrification microorganism in the dephosphorization and denitrification tank 20 to be converted into nitrogen gas (N 2 ) and released into the atmosphere. At this time, the organic carbon source required for the denitrification microorganism is appropriated from the organic matter in the mixed solution of sewage and wastewater and microorganisms introduced from the sewage and wastewater and the aerobic tank (10). In the dephosphorization / denitrification tank 20 with an extended hydraulic residence time, excessive release of phosphorus occurs together with denitrification.

인제거 미생물은 산소가 없는 조건에서 유기물을 Polymer의 중간 형태인 PHB (Poly - Hydroxyl Butyrate)로 세포내 축적하게 되는데 이 과정에서 필요한 energy를 얻기 위하여 세포내 ATP(Adenosine di-phosphate(2인산))를 ADP(Adenosine tri-phosphate(3인산))로 전환시킨 결과로 H2PO4 - 를 방출한다. Phosphorus-removing microorganisms accumulate organic matter in the cell as PHB (Poly-Hydroxyl Butyrate), which is an intermediate form of polymer, in the absence of oxygen.In this process, ATP (Adenosine di-phosphate) is used to obtain the energy required. Is converted to ADP (Adenosine tri-phosphate) to release H 2 PO 4 − .

호기조건에서 인제거 미생물은 다시 PHB를 전자공여체로 이용하여 체내에 ATP 형태로 인을 저장하게 된다. 이때 반응조내에 존재하는 미생물(MLSS)를 폐기함으로써 인을 제거할 수 있다. Under aerobic conditions, the phosphorus-removing microorganism uses PHB as an electron donor to store phosphorus in the form of ATP in the body. At this time, it is possible to remove phosphorus by discarding the microorganisms (MLSS) present in the reaction tank.

본 공정의 탈인ㆍ탈질조(20) 체류시간은 인의 과잉방출 및 질소의 탈질반응을 유도하기 위하여 일반적인 하ㆍ폐수내에 존재하는 질소를 제거하기 위한 체류시간 보다 좀 더 긴 3시간 이상으로 설계되었고, 따라서 일반적인 탈인ㆍ탈질조 용적보다는 상대적으로 더 크다. 체류시간이 연장된 탈인ㆍ탈질조(20)에 존재하는 임의성 미생물은 분할 유입되는 하ㆍ폐수 중에 포함되어있는 쉽게 분해되는 유기물 SCVFA(Short Chain Volatile Fatty Acid)를 PHB 형태로 세포내에 축척하고 활동에 필요한 energy를 얻기 위하여 인을 과잉방출하게 되며 과잉방출된 인은 호기조에서 인축적 미생물에 의하여 과잉섭취되어 미생물(MLSS)을 폐기함으로써 제거된다. The dephosphorization and denitrification tank 20 residence time of this process is designed to be longer than 3 hours longer than the residence time to remove nitrogen present in general sewage and wastewater in order to induce excessive release of phosphorus and denitrification of nitrogen. Therefore, it is relatively larger than the general dephosphorization and denitrification tank volume. Random microorganisms present in the dephosphorization / denitrification tank 20 with extended residence time accumulate intracellularly in the form of PHB in the form of PHB, which is an easily decomposed organic substance SCVFA contained in the sewage and wastewater that is split into and flows. Phosphorus is released excessively in order to obtain the required energy. Phosphorus released is overingested by an accumulating microorganism in an aerobic tank and is removed by discarding the microorganism (MLSS).

유량조정조(50)로 부터 유입되는 하·폐수와 호기로조부터 유입되는 하·폐수와 를 적절히 혼합하여 탈질화를 일으키기 위해 탈인ㆍ탈질조(20)내에 수류교반기(70)를 설치하여, 유량조정조(50)와 호기조(10)로부터 유입된 하·폐수를 혼합시킨다.A water stirrer 70 is installed in the dephosphorization and denitrification tank 20 to appropriately mix the sewage and wastewater introduced from the flow rate adjustment tank 50 with the sewage and wastewater introduced from the exhalation tank to cause denitrification. The waste water introduced from the adjustment tank 50 and the aerobic tank 10 is mixed.

탈인ㆍ탈질조(20)로부터 탈질화된 하·폐수와 미생물의 혼합액은 후단의 막분리호기조(30)로 이송된다. 막분리호기조(30)로 유입된 혼합액내에는 용존유기물질과 인성분물질, 부유물질과 미량의 암모니아성질소(NH3-N)와 미량의 아질산성질소(NO2-N)성분이 존재한다.The denitrification and denitrification tank 20 denitrified wastewater and the mixed solution of microorganisms are transferred to the membrane separation aeration tank 30 at the rear stage. In the mixed solution introduced into the membrane separation tank 30, there are dissolved organic matter, phosphorus substance, suspended matter, trace amount of ammonia nitrogen (NH 3 -N) and trace amount of nitrous nitrogen (NO 2 -N). .

막분리호기조(30)내에는 운전조건에 맞는 농도의 미생물(5000 ~ 12000㎎/ℓ) 이 존재하는데 유기오염물질이 미생물의 먹이로서 소비되어 제거된다. 또한 막분리호기조(30)에 유입된 미량의 암모니아성질소(NH3-N)와 아질산성질소(NO2-N) 성분은 막분리호기조(30)내 호기성 상태에서 질산화 과정을 거쳐 질산성질소(NO3-N) 성분으로 전환된다.In the membrane separation tank 30, microorganisms (5000 to 12000 mg / l) having a concentration corresponding to the operating conditions exist, and organic pollutants are consumed and removed as food for the microorganisms. In addition, trace amounts of ammonia nitrogen (NH 3 -N) and nitrite nitrogen (NO 2 -N) introduced into the membrane separation tank 30 are subjected to nitrification in an aerobic state in the membrane separation tank 30. Is converted to the (NO 3 -N) component.

인성분물질은 막분리호기조내(30)에 존재하는 미생물에 의해 과잉섭취되어 하·폐수로부터 제거된다. 장치내에 과량의 인성분이 유입될 경우를 대비하여 장치 외부에 응집제 약품탱크(130)를 설치하여 유사시 응집제를 막분리조내에 투입하여 인성분을 응집시켜 제거할 수 있도록 하였다.Phosphorus component is excessively ingested by the microorganisms present in the membrane separation tank 30 and removed from the sewage and wastewater. In case the excess phosphorus component is introduced into the apparatus, a flocculant chemical tank 130 is installed outside the apparatus to coagulate and remove the phosphorus component by injecting the flocculant into the membrane separation tank in case of emergency.

유기오염물질과 인성분물질이 제거되면 막분리호기조(30)내에는 결국 부유물질과 미생물과 같은 고형물만이 존재하게 되는데, 이는 분리막(80)에 의해 처리수와 고형물로 고·액 분리되게 된다. 분리막(80)은 분리막프레임장치(82)에 결합된 상태로 고·액 분리가 가능한데 분리막프레임장치(82)는 막분리호기조(30) 외부에 존재하는 흡인펌프(90)와 연결되어 있다.When the organic pollutants and phosphorus substances are removed, only the solid matter such as the suspended matter and the microorganism is present in the membrane separation tank 30, which is separated into the treated water and the solid by the separation membrane 80. . Separation membrane 80 is solid-liquid separation is possible in a state coupled to the membrane frame device 82, the membrane frame device 82 is connected to the suction pump 90 existing outside the membrane separation tank (30).

흡인펌프(90)의 가동으로 발생되는 흡인압에 의해 분리막(80) 외부의 처리수가 분리막(80) 공극을 통해 분리막(80) 내부로 유입되면서 고·액분리가 발생되어 깨끗한 처리수만 유출되게 된다.Due to the suction pressure generated by the operation of the suction pump 90, the treated water from the separator 80 is introduced into the separator 80 through the pores of the separator 80, so that solid and liquid separation occurs, and only the clean treated water flows out. .

분리막(80) 표면에 발생되는 폐색을 지연시켜 가동시간을 연장시키기 위해 분리막프레임장치(82) 하단에 산기장치(60)를 설치한다. 이 산기장치(60)는 막분리호기조(30) 외부에 존재하는 공기발생기(120)와 공기 라인을 통해 연결되어 있고 공기발생기의 가동을 통해 공기를 막분리호기조(30) 내부에 공급하게 된다. 이 공기에 의한 에어 스크러빙에 의해 막분리호기조(30)내 수류가 형성되어 분리막(80) 표면의 폐색이 지연됨으로써 장치가 장기간 원활히 가동되게 된다.An air diffuser 60 is installed at the bottom of the membrane frame device 82 in order to delay the blockage generated on the surface of the separator 80 to prolong the operation time. The diffuser device 60 is connected to the air generator 120 existing outside the membrane separation tank 30 through an air line, and supplies air to the membrane separation tank 30 through the operation of the air generator. The air scrubbing by the air forms a stream of water in the membrane separation tank 30, and the blockage of the surface of the membrane 80 is delayed, so that the device can be smoothly operated for a long time.

장치를 장기간 운영하는 동안 막분리호기조(30)내의 미생물과 부유물질 등의 고형물이 계속적으로 증가하게 된다. 막분리호기조(30)내 적절한 미생물 농도를 유지하고 부유물질 등의 고형물질을 제거하기 위해 막분리호기조(30)로부터 호기조(10)로 반송되는 라인에 별도로 슬러지농축저류조(40)로 연결된 배관라인에 설치된 밸브를 조작하여 슬러지(미생물과 부유물질 및 불용성 인성분물질이 합쳐진 물질)를 간헐적으로 슬러지농축저류조(40)로 이송시킨다.During the long-term operation of the apparatus, solids such as microorganisms and suspended solids in the membrane separation tank 30 continue to increase. Pipe line connected to the sludge concentration storage tank 40 separately from the line conveyed from the membrane separation tank 30 to the aeration tank 10 in order to maintain an appropriate microbial concentration in the membrane separation tank 30 and to remove solid substances such as suspended matter. By operating the valve installed in the sludge (material combined with microorganisms, suspended matter and insoluble phosphorus material) is intermittently transferred to the sludge concentration storage tank (40).

막분리호기조(30)내의 슬러지는 평상시에는 호기조(10)로 반송시키고 막분리호기조(30)내 미생물 농도가 매우 높을 경우엔 슬러지농축저류조(40)로 이송시켜 미생물 농도를 조절한다. 슬러지농축저류조(40)내 상등액은 슬러지농축저류조(40)와 유량조정조(50) 사이의 오픈 슬리브를 통해 유량조정조(50)로 되돌아가게 하고, 슬러지의 고착화를 방지하기 위해 공기발생기(120)와 연결된 에어라인을 설치한다.Sludge in the membrane separation tank 30 is usually returned to the aerobic tank 10, and when the concentration of microorganisms in the membrane separation tank 30 is very high, it is transferred to the sludge concentration storage tank 40 to control the microbial concentration. The supernatant in the sludge concentration storage tank 40 is returned to the flow rate adjustment tank 50 through an open sleeve between the sludge concentration storage tank 40 and the flow rate adjustment tank 50, and the air generator 120 and Install the connected airline.

분리막(32)으로부터 생성된 처리수는 흡인펌프(90)에 의해 막분리호기조(30) 일측에 설치된 처리수조(도시되지 않음)로 이송된다. 이 처리수를 중수로 재이용하 고자 할 시에는 별도의 중수설비(소독설비, 펌프 등)를 갖추어 재사용할 수 있다.The treated water generated from the separation membrane 32 is transferred to the treatment water tank (not shown) installed at one side of the membrane separation tank 30 by the suction pump 90. If the treated water is to be reused as heavy water, separate heavy water facilities (disinfection facilities, pumps, etc.) can be reused.

도 1은 본 발명에 따른 침지식 막분리 고도처리 장치를 나타낸 것이다.Figure 1 shows an immersion type membrane separation advanced processing apparatus according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 호기조 20 : 탈인ㆍ탈질조10: aerobic tank 20: dephosphorization and denitrification tank

30 : 막분리호기조 40 : 슬러지농축저류조30: membrane separation tank 40: sludge concentration storage tank

50 : 유량조정조 55 : 드럼스크린50: flow adjustment tank 55: drum screen

60 : 산기장치 70 : 수류교반기 60: diffuser 70: water stirrer

80 : 분리막 90 : 흡인펌프80: separator 90: suction pump

120 : 공기발생기 130 : 약품탱크120: air generator 130: chemical tank

Claims (8)

유입된 하·폐수로부터 협잡물을 제거하고, 일정량의 하·폐수를 공급하는 유량조정조와;A flow rate adjusting tank for removing impurities from the introduced sewage and wastewater and supplying a predetermined amount of sewage and wastewater; 상기 유량조정조로 부터 하·폐수를 공급받고, 하·폐수에 존재하는 용존유기물이 호기성 미생물에 의해 분해되며, 동시에 유입 하·폐수내 암모니아질소 및 아질산성질소의 질산화가 일어나 질소성분이 질산성질소의 형태로 전환되는 호기조와;Sewage and wastewater are supplied from the flow control tank, and dissolved organic matter present in the wastewater and wastewater is decomposed by aerobic microorganisms, and at the same time, nitrification of ammonia nitrogen and nitrite nitrogen in the influent sewage and wastewater causes nitrogen to form nitrogen nitrate. An aerobic tank converted to; 상기 호기조로부터 하·폐수와 미생물의 혼합액을 공급받고, 유입 하·폐수내 다량의 질산성질소와 혼합액내 함유되어 있는 소량의 질산성질소가 결합산소가 제거됨으로써 질소가스로 전환하여 대기중으로 방출되고, 탈질미생물이 활동하는데 필요한 유기탄소원은 호기조 및 유량조정조로부터 유입된 하·폐수내 유기물로 충당하는 탈인ㆍ탈질조와;The mixed solution of sewage / wastewater and microorganisms is supplied from the aerobic tank, and a large amount of nitrate nitrogen in the inlet / wastewater and a small amount of nitrate nitrogen contained in the mixed solution are converted into nitrogen gas by removing the bound oxygen and released into the atmosphere. The organic carbon sources required for the denitrification of microorganisms include dephosphorization and denitrification tanks, which are covered by organic matter in sewage and wastewater from aerobic and flow control tanks; 상기 탈인ㆍ탈질조로부터 하·폐수와 미생물의 혼합액을 공급받고, 유기오염물질이 미생물의 먹이로서 소비되어 제거되고, 미량의 암모니아성 질소와 아질산성질소 성분은 호기성상태에서 질산화과정을 거쳐 질산성질소 성분으로 전환되며, 인성분물질은 미생물에 의해 과잉섭취되어 제거되는 막분리호기조와;The mixed solution of sewage and wastewater and microorganisms is supplied from the dephosphorization and denitrification tank, and organic pollutants are consumed and removed as food for microorganisms, and trace amounts of ammonia nitrogen and nitrite nitrogen components are subjected to nitrification in an aerobic state through nitrification. A membrane separation aeration tank which is converted into a nitrogen component and the phosphorus substance is excessively ingested and removed by the microorganism; 상기 호기조와 막분리호기조 사이에는 막분리호기조의 하·폐수를 호기조로 반송시킬 수 있는 반송배관과;A conveying pipe capable of conveying the sewage / waste water of the membrane separation tank to the exhalation tank between the exhalation tank and the membrane separation tank; 상기 막분리호기조에 분리막프레임장치에 의해 고정된 분리막과;A membrane fixed to the membrane separation tank by a membrane frame device; 상기 분리막 프레임장치에 연결되어 흡인압력에 의해 고·액분리시켜 외부로 처리수를 방출하는 흡인펌프를 포함하여 이루어진 것을 특징으로 하는 침지식 막분리 고도처리 장치.And a suction pump connected to the separator frame device to separate solid and liquid by suction pressure to discharge the treated water to the outside. 제1항에 있어서,The method of claim 1, 상기 막분리호기조로부터 호기조로 반송되는 라인에 슬러지 등의 고형물을 제거하기 위해 슬러지농축저류조로 별도의 라인이 연결된 것을 특징으로 하는 침지식 막분리 고도처리 장치.Immersion type membrane separation advanced processing apparatus, characterized in that a separate line is connected to the sludge concentration storage tank to remove the solids such as sludge in the line conveyed from the membrane separation tank to the aerobic tank. 제1항에 있어서,The method of claim 1, 상기 막분리 호기조의 일측에는 과량의 인성분이 유입될 경우 화학약품을 투입하여 인성분을 화학적으로 응집시켜 제거할 수 있는 약품탱크가 설치된 것을 특징으로 하는 침지식 막분리 고도처리 장치.One side of the membrane separation aeration tank is an immersion type membrane separation advanced processing apparatus, characterized in that a chemical tank is installed that can be removed by chemically agglomerated phosphorus by introducing a chemical when excess phosphorus component is introduced. 제1항에 있어서,The method of claim 1, 상기 유량조정조는 상기 호기조와 탈인ㆍ탈질조에 하·폐수를 분할공급하여 탈인ㆍ탈질조에서 필요한 유기탄소원을 보충할 수 있는 것을 특징으로 하는 침지식 막분리 고도처리 장치.And the flow rate adjusting tank is capable of replenishing the organic carbon source required in the dephosphorization and denitrification tank by dividing and supplying waste water to the aerobic tank and the dephosphorization and denitrification tank. 삭제delete 삭제delete 삭제delete 삭제delete
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