KR100677698B1 - Anaerobic wastewater treatment method for high strength wastewater with high nitrogen content - Google Patents

Anaerobic wastewater treatment method for high strength wastewater with high nitrogen content Download PDF

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KR100677698B1
KR100677698B1 KR1020030061978A KR20030061978A KR100677698B1 KR 100677698 B1 KR100677698 B1 KR 100677698B1 KR 1020030061978 A KR1020030061978 A KR 1020030061978A KR 20030061978 A KR20030061978 A KR 20030061978A KR 100677698 B1 KR100677698 B1 KR 100677698B1
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    • C—CHEMISTRY; METALLURGY
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    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/2893—Particular arrangements for anaerobic reactors with biogas recycling
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Abstract

본 발명은 음식물 쓰레기 탈리액, 축산폐수, 침출수, 일부 산업폐수 등 고농도의 질소와 유기물을 동시에 함유하는 폐수의 혐기성 처리 시스템에 관한 것으로, 폐수를 혐기성 처리하는 과정에서 혐기성 미생물이 암모니아성 질소에 의하여 활성이 저하되는 것을 방지하여 유효성 있는 혐기성 처리를 반복할 수 있게 함으로써 혐기성 처리로 폐수처리를 완결할 수 있는 고농도의 질소와 유기물을 동시에 함유하는 폐수의 혐기성 처리 시스템을 제공하는 것이 목적이다.The present invention relates to an anaerobic treatment system for wastewater containing both high concentrations of nitrogen and organics such as food waste stripping liquid, livestock wastewater, leachate, and some industrial wastewater. It is an object of the present invention to provide an anaerobic treatment system for wastewater containing both high concentrations of nitrogen and organic matter that can be completed by anaerobic treatment by preventing the degradation and enabling effective anaerobic treatment to be repeated.

본 발명의 고농도 질소와 유기물 함유 폐수의 혐기성 처리 시스템은,The anaerobic treatment system of the high concentration nitrogen and organic matter containing wastewater of this invention,

폐수 내의 유기물은 메탄가스와 이산화탄소가 주종인 바이오가스로 전환되고 폐수 내의 유기질소는 암모니아성 질소로 전환되는 1차 혐기성 반응조와; 1차 혐기성 반응조의 유출수에 포함된 암모니아성 질소를 호기성 미생물을 사용하여 아질산성 질소와 질산성 질소로 전환시킴으로써 암모니아성 질소의 농도를 감소시키는 부착성장식 호기성 반응조와; 아질산성 질소와 질산성 질소가 혐기성 조건에서 질소가스로 전환되는 반응과 유기물이 추가로 제거되는 반응이 동시에 일어나는 2차 혐기성 반응조로 이루어지고, 폐수가 1차 혐기성 반응조로 유입되어 호기성 반응조와 2차 혐기성 반응조를 차례로 거치면서 처리된다.A first anaerobic reactor in which organic matter in the wastewater is converted into biogas mainly composed of methane gas and carbon dioxide, and organic nitrogen in the wastewater is converted into ammonia nitrogen; An attached growth-type aerobic reactor for reducing the concentration of ammonia nitrogen by converting ammonia nitrogen contained in the effluent of the first anaerobic reactor into nitrite nitrogen and nitrate nitrogen using an aerobic microorganism; It consists of a secondary anaerobic reactor in which nitrous and nitrate nitrogen are converted to nitrogen gas under anaerobic conditions and an additional removal of organic matter is carried out simultaneously.Waste water flows into the first anaerobic reactor and the aerobic reactor and the secondary It is processed by passing through an anaerobic reactor.

고농도, 암모니아성 질소, 독성 발현, 혐기성 반응조, 바이오가스, 질산화, 탈질High concentration, ammonia nitrogen, toxic expression, anaerobic reactor, biogas, nitrification, denitrification

Description

고농도의 질소와 유기물 함유하는 폐수의 혐기성 처리 시스템 {Anaerobic wastewater treatment method for high strength wastewater with high nitrogen content}Anaerobic wastewater treatment method for high strength wastewater with high nitrogen content}

도 1은 본 발명 혐기성 처리 시스템의 개요도이다.1 is a schematic diagram of the anaerobic treatment system of the present invention.

*도면의 주요 부분에 대한 부호 설명** Description of symbols on the main parts of the drawings *

1 : 1차 혐기성 반응조 2 : 부착성장식 호기성 반응조1: 1st anaerobic reactor 2: attached growth type aerobic reactor

3 : 2차 혐기성 반응조3: secondary anaerobic reactor

본 발명은 음식물 쓰레기 탈리액, 축산폐수, 침출수, 일부 산업폐수 등 고농도의 질소와 유기물을 동시에 함유하는 폐수의 혐기성 처리 시스템에 관한 것으로, 보다 상세하게는 생성되는 암모니아성 질소가 혐기성 미생물에 독성을 발현하여 활성을 저하시키는 것을 방지함으로써 추가로 혐기성 처리를 할 수 있게 하여 혐기성 처리로 폐수처리를 완결할 수 있게 한 혐기성 처리 시스템에 관한 것이다.The present invention relates to an anaerobic treatment system for wastewater containing both high concentrations of nitrogen and organic materials, such as food waste desorbing liquid, livestock wastewater, leachate, and some industrial wastewater, and more specifically, ammonia nitrogen produced is toxic to anaerobic microorganisms. The present invention relates to an anaerobic treatment system in which wastewater treatment can be completed by anaerobic treatment by preventing further degradation of the activity.

고농도의 질소와 유기물을 동시에 함유하는 음식물 쓰레기 탈리액, 축산폐수, 침출수, 일부 산업폐수 등은 1차 혐기성 처리를 하면 일반적으로 CODcr가 6,000~30,000mg/L가 되는데 이는 경제적인 혐기성 처리가 가능하다고 알려진 2,000mg/L보다 상당히 높은 농도임에도 불구하고 실제로는 재차 혐기성 처리를 하여도 유기물이 추가적으로 제거되지 않는다. 왜냐하면 혐기성 처리과정에서 많은 양의 유기물이 메탄가스로 전환되는 동시에 유기성 질소가 암모니아성 질소로 전환되어 혐기성 미생물의 생장과 활성에 악영향을 주기 때문이다.Food waste stripping, livestock waste, leachate, and some industrial wastewater containing both high concentrations of nitrogen and organics at the same time generally have a CODcr of 6,000 to 30,000 mg / L when subjected to the first anaerobic treatment, which is known to enable economic anaerobic treatment. Despite the fact that concentrations are significantly higher than 2,000 mg / L, the anaerobic treatment does not actually remove additional organic matter. This is because a large amount of organic matter is converted to methane gas during anaerobic treatment, and organic nitrogen is converted into ammonia nitrogen, which adversely affects the growth and activity of anaerobic microorganisms.

그리하여 일반적으로 호기성 처리로 폐수처리를 완결하는데 이렇게 하기 위해서는 큰 규모의 폭기조가 필요하여 건설비와 운전비가 많이 들고, 호기성 슬러지가 대량으로 발생하여 폐기비용이 많이 드는 단점이 있다. Therefore, in general, the wastewater treatment is completed by aerobic treatment. To this end, a large aeration tank is required, and a large amount of construction and operation costs are generated, and a large amount of aerobic sludge is generated.

본 발명의 목적은 폐수를 혐기성 처리하는 과정에서 혐기성 미생물이 암모니아성 질소에 의하여 활성이 저하되는 것을 방지하여 유효성 있는 혐기성 처리를 반복할 수 있게 함으로써 혐기성 처리로 폐수처리를 완결할 수 있는 고농도의 질소와 유기물을 동시에 함유하는 폐수의 혐기성 처리 시스템을 제공하는 것이다.It is an object of the present invention to prevent the anaerobic microorganisms from lowering activity due to ammonia nitrogen during the anaerobic treatment of wastewater, so that the effective anaerobic treatment can be repeated, so that a high concentration of nitrogen can be completed by the anaerobic treatment. It is to provide an anaerobic treatment system for wastewater containing and organic matter at the same time.

상기한 목적을 달성하기 위한 본 발명의 고농도 질소와 유기물 함유 폐수의 혐기성 처리 시스템은,The anaerobic treatment system of high concentration nitrogen and organic matter-containing wastewater of the present invention for achieving the above object,

폐수 내의 유기물은 메탄가스와 이산화탄소가 주종인 바이오가스로 전환되고 폐수 내의 유기질소는 암모니아성 질소로 전환되는 1차 혐기성 반응조와;A first anaerobic reactor in which organic matter in the wastewater is converted into biogas mainly composed of methane gas and carbon dioxide, and organic nitrogen in the wastewater is converted into ammonia nitrogen;

1차 혐기성 반응조의 유출수에 포함된 암모니아성 질소를 호기성 미생물을 사용하여 아질산성 질소와 질산성 질소로 전환시킴으로써 암모니아성 질소의 농도 를 감소시키는 부착성장식 호기성 반응조와;An attached growth-type aerobic reactor for reducing the concentration of ammonia nitrogen by converting ammonia nitrogen contained in the effluent of the first anaerobic reactor into nitrite nitrogen and nitrate nitrogen using an aerobic microorganism;

아질산성 질소와 질산성 질소가 혐기성 조건에서 질소가스로 전환되는 반응과 유기물이 추가로 제거되는 반응이 동시에 일어나는 2차 혐기성 반응조로 이루어지고,It consists of a secondary anaerobic reactor in which nitrous and nitrate nitrogen are converted to nitrogen gas under anaerobic conditions and an additional removal of organic matter is performed.

폐수가 1차 혐기성 반응조로 유입되어 호기성 반응조와 2차 혐기성 반응조를 차례로 거치면서 처리된다.The wastewater enters the first anaerobic reactor and is processed through the aerobic reactor and the second anaerobic reactor.

본 발명의 구성을 도 1을 사용하여 보다 상세히 설명한다.The configuration of the present invention will be described in more detail using FIG. 1.

본 발명의 처리 대상인 고농도의 질소와 유기물을 동시에 함유한 폐수는 1차 혐기성 반응조(1)로 유입되는데 별도로 가온설비(미도시)를 두어 반응조의 온도를 혐기성 소화에 적합한 35~55℃로 유지하는 것이 바람직하다.Wastewater containing both high concentrations of nitrogen and organic matter, which is the subject of the present invention, is introduced into the first anaerobic reactor (1), and separately maintained by heating equipment (not shown) to maintain the temperature of the reactor at 35 to 55 ° C. suitable for anaerobic digestion. It is preferable.

1차 혐기성 반응조(1)에서는 용존 유기물의 70~85% 정도가 메탄가스와 CO2가 주성분인 바이오가스로 전환되고, 유기성 질소가 암모니아성 질소로 전환되는데 1차 혐기성 반응조로는 소화조, 또는 소화조와 혐기성 침전조로 구성되는 혐기성 접촉공정 (anaerobic contact process), UASB (upflow anaerobic sludge blanket), AF (anaerobic filter), 또는 UASB와 AF의 혼합형 반응조를 사용한다. In the first anaerobic reactor (1), about 70 to 85% of dissolved organics are converted to biogas, which is composed mainly of methane gas and CO 2 , and organic nitrogen is converted to ammonia nitrogen. Anaerobic contact process (anaerobic contact process), UASB (upflow anaerobic sludge blanket), anaerobic filter (AF) or mixed reactor of UASB and AF are used.

부착성장식 호기성 반응조(2)는 반응조 내에 여재가 설치되어 미생물이 부착하여 성장하는데 여기에서는 암모니아성 질소는 질산성 질소나 아질산성 질소로 전환된다. 즉. 호기성 반응조에서 암모니아성 질소의 농도가 감소되어 이어지는 2차 혐기성 반응조(3)에서 암모니아성 질소의 독성이 발현되지 않게 되므로 혐기성 상태에서의 유기물의 추가적인 제거가 가능하게 되는 것이다. 다만, 이 호기성 반응조는 중온이나 고온으로 운전되므로 이 반응조에서 제거되는 유기물의 양은 많지 않다.In the attached growth-type aerobic reactor (2), a filter medium is installed in the reactor to grow microorganisms, where ammonia nitrogen is converted into nitrate nitrogen or nitrite nitrogen. In other words. In the aerobic reactor, the concentration of ammonia nitrogen is reduced, so that the toxicity of ammonia nitrogen is not expressed in the subsequent anaerobic reactor (3), so that further removal of organic matter in the anaerobic state is possible. However, since the aerobic reactor is operated at medium or high temperatures, the amount of organic matter removed from the reactor is not high.

호기성 반응조로는 부착성장식 호기성 반응조(2) 대신 암모니아성 질소를 아질산성 질소로 선택적으로 전환시키는, HRT (hydraulic retention time)가 짧게 유지되는 미생물이 부유하면서 성장하는 부유성장식 반응조를 사용할 수 있다.As an aerobic reactor, a floating growth reactor in which a microorganism with a short HH (hydraulic retention time) is maintained can be used instead of the attached growth-type aerobic reactor (2). .

암모니아성 질소를 아질산성 질소로 선택적으로 전환하기 위한 방법으로는 용존산소 농도를 낮게 유지하는 방법(Turk et al., 1989; Hanaki et al., 1990; Laanbrek et al., 1993), 온도를 높게 유지하고 생물학적 체류시간 (SRT)을 짧게 유지하는 방법(Beccari et al., 1979; Randall et al., 1984; Hellinga et al., 1998), 및 pH를 높게 유지하는 방법(Anthonisen et al., 1976; Turk et al., 1989; Abeling et al., 1992) 등이 있는데 이들 중 1가지를 선택하거나 병용/혼용할 수도 있다.A method for the selective conversion of ammonia nitrogen to nitrite nitrogen is to maintain a low dissolved oxygen concentration (Turk et al., 1989; Hanaki et al., 1990; Laanbrek et al., 1993). Maintenance and short biological retention time (SRT) (Beccari et al., 1979; Randall et al., 1984; Hellinga et al., 1998), and methods of maintaining high pH (Anthonisen et al., 1976) (Turk et al., 1989; Abeling et al., 1992), one of which may be selected or used in combination.

상기 방법 중 온도를 높게 유지하고 생물학적 체류시간 (SRT)을 짧게 유지하는 방법으로는 Sharon (single reactor high activity ammonia removal over nitrite, 미국특허 제5,863,435호) 공법으로 알려져 있다. The method of maintaining a high temperature and a short biological residence time (SRT) of the method is known as Sharon (single reactor high activity ammonia removal over nitrite, US Patent No. 5,863,435).

2차 혐기성 반응조(3)에서 유기물은 추가적인 분해 및 바이오가스로의 전환이 일어나고, 질산성 질소와 아질산성 질소는 탈질되어 질소가스로 배출된다. 즉, 유기물 제거 및 탈질이 동시에 일어나는 것인데 2차 혐기성 반응조로는 1차 혐기성 반응조와 마찬가지로 UASB, AF 등에서 선택된다. In the second anaerobic reactor 3, organic matter is further decomposed and converted into biogas, and nitrate nitrogen and nitrite nitrogen are denitrated and discharged to nitrogen gas. In other words, organic matter removal and denitrification occur simultaneously, and the second anaerobic reactor is selected from UASB, AF and the like as the first anaerobic reactor.

부착성장식 또는 부유성장식 호기성 반응조는 DO를 0.5~2.5ppm, 바람직하게는 2.0ppm 이하로 운전한다.The attached growth or suspended growth aerobic reactor operates DO at 0.5 to 2.5 ppm, preferably at 2.0 ppm or less.

그리고 2차 혐기성 공정 후단에 일반적으로 채용되는 질산화조와 탈질조를 추가로 설치하면 질소를 더 많이 제거할 수 있다.In addition, the additional nitrification tank and denitrification tank which are generally employed at the end of the second anaerobic process can remove more nitrogen.

<실시예 1><Example 1>

도 1에 도시된 시스템에서 CODcr이 60,000mg/l이고, T-N과 NH4-N이 각각 5,000mg/l과 1,000mg/l의 고형물이 제거된 양돈폐수를 처리하였다. In the system shown in Figure 1 CODcr was 60,000mg / l, TN and NH 4 -N was treated with swine wastewater from the removal of 5,000mg / l and 1,000mg / l solids, respectively.

1차 혐기성 반응조, 부착성장식 호기성 반응조, 및 2차 혐기성 반응조는 각각 1,500L(소화조), 50L(폭기조에 개꼬리 여재 투입함), 및 340L(하이브리드 반응조)인 반응조를 사용하였고, 반응조를 평균 35℃로 유지하고 내부반송을 하면서 100L/d의 유량으로 운전하였다. 또한 부착성장식 호기성 반응조로 질산화를 위하여 공기를 주입하여 DO를 1.4~2.1ppm(평균 1.7ppm)으로 유지하였다.The first anaerobic reactor, the attached growth-type aerobic reactor, and the second anaerobic reactor used reactors of 1,500 L (digestion tank), 50 L (dog tail filter in the aeration tank), and 340 L (hybrid reactor), respectively. The temperature was maintained at 35 ° C. and operated at a flow rate of 100 L / d while performing internal transport. In addition, DO was maintained at 1.4-2.1 ppm (average 1.7 ppm) by injecting air for nitrification in an attached growth-type aerobic reactor.

1차 혐기성 반응조, 부착성장식 호기성 반응조, 및 2차 혐기성 반응조의 유기물 부하는 각각 4kgCODcr/m3/d, 40kgCODcr·m3/d, 5.6kgCODcr/m3/d로 나타났으며, 유입수 및 각 공정별 유출수의 성상과 전체 공정에서의 제거율은 다음 표 1과 같다.The organic loads of the first anaerobic reactor, the attached growth aerobic reactor, and the second anaerobic reactor were 4 kg CODcr / m 3 / d, 40 kg CODcr · m 3 / d, and 5.6 kg CODcr / m 3 / d, respectively. The characteristics of runoff and the removal rate in the entire process are shown in Table 1 below.

유입수Influent 1차 혐기성 반응조 유출수First anaerobic reactor effluent 부착성장식 호기성 반응조 유출수Adherent growth aerobic effluent 2차 혐기성 반응조 유출수Second anaerobic reactor effluent 전체 공정 제거율(%)Total process removal rate (%) CODcr(mg/l)  CODcr (mg / l) 60,00060,000 20,00020,000 19,00019,000 2,2002,200 96.396.3 T-N(mg/l)  T-N (mg / l) 5,0005,000 2,6002,600 2,4002,400 240240 95.295.2 NH4-N(mg/l)NH 4 -N (mg / l) 1,0001,000 2,3002,300 300300 200200 80.080.0 NO3-N(mg/l)NO 3 -N (mg / l) -- -- 1,9001,900 불검출Not detected 100.0100.0 NO2-N(mg/l)NO 2 -N (mg / l) -- -- 200200 불검출Not detected 100.0100.0

한편, 바이오가스는 0.58m3/kgCODcr가 회수되었고, 바이오가스 중의 메탄 함유량은 68%였다.On the other hand, 0.58 m 3 / kg CODcr was recovered from the biogas, and the methane content in the biogas was 68%.

<실시예 2><Example 2>

도 1에 도시된 시스템에서 실시예 1의 부착성장식 호기성 반응조 대신 부유성장식 반응조를 이용하여 CODcr이 59,000mg/l이고, T-N과 NH4-N이 각각 4,800mg/l과 1,100mg/l인 고형물이 제거된 양돈폐수를 처리하였다. In the system shown in FIG. 1, CODcr is 59,000 mg / l, TN and NH 4 -N are 4,800 mg / l and 1,100 mg / l, respectively, using a floating growth reactor instead of the attached growth-type aerobic reactor of Example 1. Swine wastewater with solids removed was treated.

1차 혐기성 반응조와 2차 혐기성 반응조는 동일한 반응조를 사용하였으며 부유성장식 반응조는 HRT를 짧게 유지시키기 위하여 40L인 반응조를 사용하였고, 기타 운전조건은 실시예 1과 동일하게 하였다. 부유성장식 반응조에서 질산화를 위하여 공기를 주입하여 DO는 1.6~2.2ppm(평균 1.9ppm)으로 유지하였다.The first anaerobic reactor and the second anaerobic reactor used the same reactor, the floating growth reactor used a 40L reactor to keep the HRT short, and the other operating conditions were the same as in Example 1. Air was injected for nitrification in the suspended growth reactor, and DO was maintained at 1.6 to 2.2 ppm (average 1.9 ppm).

1차 혐기성 반응조, 부유성장식 호기성 반응조, 및 2차 혐기성 반응조의 유기물 부하는 각각 3.9kgCODcr/m3/d, 45kgCODcr·m3/d, 4.7kgCODcr/m3/d로 나타났으며, 유입수 및 각 공정별 유출수의 성상과 전체 공정에서의 제거율은 다음 표 1과 같다.The organic loads of the first anaerobic reactor, the suspended growth aerobic reactor, and the second anaerobic reactor were 3.9 kg CODcr / m 3 / d, 45 kg CODcr · m 3 / d, and 4.7 kg CODcr / m 3 / d, respectively. The characteristics of the runoff by each process and the removal rate in the overall process are shown in Table 1 below.

유입수Influent 1차 혐기성 반응조 유출수First anaerobic reactor effluent 부유성장식 반응조 유출수Suspension growth reactor effluent 2차 혐기성 반응조 유출수Second anaerobic reactor effluent 전체 공정 제거율(%)Total process removal rate (%) CODcr(mg/l)  CODcr (mg / l) 59,00059,000 18,00018,000 16,00016,000 1,8001,800 96.996.9 T-N(mg/l)  T-N (mg / l) 4,8004,800 2,3002,300 1,7001,700 210210 95.695.6 NH4-N(mg/l)NH 4 -N (mg / l) 1,1001,100 2,1002,100 200200 170170 84.584.5 NO3-N(mg/l)NO 3 -N (mg / l) -- -- 1,4001,400 불검출Not detected 100.0100.0 NO2-N(mg/l)NO 2 -N (mg / l) -- -- 150150 불검출Not detected 100.0100.0

한편, 바이오가스는 0.61m3/kgCODcr가 회수되었고, 바이오가스 중의 메탄함유량은 66%였다.On the other hand, 0.61 m 3 / kg CODcr was recovered from the biogas, and the methane content in the biogas was 66%.

본 발명에 의하면 고농도 질소와 유기물 동시에 함유하는 폐수에 대하여 여러 번의 혐기성 처리가 가능하게 되고, 부수 효과로서 연료로 사용할 수 있는 메탄가스 발생량이 증가되고, 폐기해야 할 활성오니양이 감소된다. According to the present invention, a number of anaerobic treatments are possible for wastewater containing both nitrogen and organics at the same time, and as a side effect, the amount of methane gas that can be used as fuel is increased, and the amount of active sludge to be disposed of is reduced.

Claims (3)

폐수 내의 유기물은 메탄가스와 이산화탄소가 주종인 바이오가스로 전환되고 폐수 내의 유기질소는 암모니아성 질소로 전환되는 1차 혐기성 반응조와;A first anaerobic reactor in which organic matter in the wastewater is converted into biogas mainly composed of methane gas and carbon dioxide, and organic nitrogen in the wastewater is converted into ammonia nitrogen; 1차 혐기성 반응조의 유출수에 포함된 암모니아성 질소를 호기성 미생물을 사용하여 아질산성 질소와 질산성 질소로 전환시킴으로써 암모니아성 질소의 농도를 감소시키는 부착성장식 호기성 반응조와;An attached growth-type aerobic reactor for reducing the concentration of ammonia nitrogen by converting ammonia nitrogen contained in the effluent of the first anaerobic reactor into nitrite nitrogen and nitrate nitrogen using an aerobic microorganism; 아질산성 질소와 질산성 질소가 혐기성 조건에서 질소가스로 전환되는 반응과 유기물이 추가로 제거되는 반응이 동시에 일어나는 2차 혐기성 반응조로 이루어지고,It consists of a secondary anaerobic reactor in which nitrous and nitrate nitrogen are converted to nitrogen gas under anaerobic conditions and an additional removal of organic matter is performed. 폐수가 1차 혐기성 반응조로 유입되어 호기성 반응조와 2차 혐기성 반응조를 차례로 거치면서 처리되는 고농도 폐수의 혐기성 처리 시스템.An anaerobic treatment system for high concentration wastewater in which wastewater flows into a first anaerobic reactor and is processed through an aerobic reactor and a second anaerobic reactor. 제1항에 있어서, 부착성장식 호기성 반응조 대신에 암모니아성 질소를 아질산성 질소로 선택적으로 전환시키는, HRT가 짧게 유지되는 부유성장식 반응조를 사용하는 것을 특징으로 하는 고농도 폐수의 혐기성 처리 시스템.2. The anaerobic treatment system for high concentration wastewater according to claim 1, wherein an HRT is kept in a suspended growth reactor for short converting ammonia nitrogen to nitrite nitrogen instead of an attached growth aerobic reactor. 제1항 또는 제2항에 있어서, 부착성장식 또는 부유성장식 호기성 반응조를 운전함에 있어서 용존산소의 농도를 2.0ppm 이하로 유지하는 것을 특징으로 하는 고농도 폐수의 혐기성 처리 시스템.The anaerobic treatment system for high concentration wastewater according to claim 1 or 2, wherein the concentration of dissolved oxygen is maintained at 2.0 ppm or less when operating the attached growth or suspended growth aerobic reactor.
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KR102396268B1 (en) 2021-11-18 2022-05-11 주식회사 대성그린테크 Waste water treating system combined with physical and chemical and biological process for high Nitrogen containing waste water

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JPH06106191A (en) * 1992-09-29 1994-04-19 Matsushita Electric Ind Co Ltd Method and device for disposal of garbage

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JPH06106191A (en) * 1992-09-29 1994-04-19 Matsushita Electric Ind Co Ltd Method and device for disposal of garbage

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KR102396268B1 (en) 2021-11-18 2022-05-11 주식회사 대성그린테크 Waste water treating system combined with physical and chemical and biological process for high Nitrogen containing waste water

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