하수처리수 재이용을 위한 카본블럭 여과시스템의 최적운전조건 도출

안성환 ( Seong-hwan An ),조용현 ( Yong-hyun Cho ),김연은 ( Yun-eun Kim ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.5

국내 재이용수는 대부분 하천유지용수에 집중되고 있으며 신도시의 확대에 따라 도시재이용수로의 이용증대가 요구되는 시점에서 하수처리수 재이용수 용도별 수질기준 만족을 위한 최적 3차 처리기술 확보가 필요한 시점이다. 본 연구는 하수처리수 재이용과 처리수 수질개선을 위하여 카본블럭을 이용한 여과 공정을 연계한 시스템 구성을 통해 입자제거 가능성을 평가하는데 목적이 있다. 카본블럭의 수처리 특성을 알아보기 위해 수평형 카본블럭 수처리 모듈로 처리장치를 구성하였다. 실험 결과, 역세공정을 미적용하여 지속적으로 운전할 경우 플럭스는 여과시간에 따라 지속적으로 감소하는 것으로 나타났다. 또한 카본블럭의 여과저항 특성을 살펴보면 플럭스가 감소함에 따라 여과저항은 0.01에서 0.07까지 증가함을 알 수 있다. Domestic reclaimed water is mainly concentrated on river management flow and as new towns are expanding gradually, the usage enlargement toward city reclaimed water is really needed at this stage and securement of the best 3rd process technology is also needed for the satisfaction of water quality standard by use of wastewater as reclaimed water. The aims of this research are focused on wastewater reuse and evaluating the possibility of particle removal through organizing system linked to filtration process using carbon block for the improvement of effluent quality. To examine the characteristics of water treatment of carbon block, we composed processing installation with horizontal carbon block water treatment module. As a result of experiment, in case of constant operation without backwash process it was approved that flux was decreased continuously according to filtration time. And also when focusing on the characteristic of filtration resistance of carbon block, it was approved that the filtration of resistance increased from 0.01 to 0.07 as flux decreased.

크립토스포리디움의 정수처리기준 도입을 위한 문헌 고찰

안성환 ( Seong Hwan An ),조용현 ( Yong Hyun Cho ),김연은 ( Yun Eun Kim ) 한국수처리학회 2013 한국수처리학회지 Vol.21 No.6

In this study, it is studied to find cryptosporidium distribution, target removal rate using risk management method and to set-up Treatment Technique (TT) guideline suitable in domestic treatment plants. It is also researched the case-study in foreign countries for additional removal level of pathogenic protozoan. It is concluded that it is accredited an additional 0.5 Log removal when an effluent turbidity level in a treatment plant meet 0.15 NTU instead of 0.3 NTU and an additional 0.5Log removal when the treatment plant adapt the sand-filtration and GAC process as filtration process. Meanwhile in the case of membrane filtration it is not exceeded the maximum 4 Log removal accreditation calculating by experimental results.

효과적인 정수처리를 위한 크립토스포리디움 목표 제거율 검토

안성환 ( Seong Hwan An ),조용현 ( Yong Hyun Cho ),김연은 ( Yun Eun Kim ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.1

In terms of public health, it is very important to ensure a safe drinking water from pathogenic microorganisms that cause water-borne disease. Cryptosporidium in the country for the treatment of drinking water treatment regulations standards are being conducted. However, the existing pathogenic protozoa such as cryptosporidium and process operating conditions, etc., for the removal of the need for additional reset. So it is required to install alternative disinfection treatment process for controlling pathogenic protozoan such as cryptosporidium. In this study it was investigated to find cryptosporidium distribution and target removal rate using risk management method. Thoroughout this study it was not reported of any outbreak of waterborne disease case by cryptosporidium. But it is still necessary to investigate a possibility of infection by it. Also it was concluded that target removal rate of cryptosporidium in water treatment plant was required 2 to 4 log at least.

활성카본 호안블럭을 이용한 하천수질정화

조용현 ( Yong Hyun Cho ),안성환 ( Seong Hwan An ),김연은 ( Yun Eun Kim ) 한국수처리학회 2013 한국수처리학회지 Vol.21 No.5

In the deposition amount of the biofilm using peanut shaped porous revetment block, formed by microorganisms, to try increasing the self-purification of river. And experiment has compared the ability of the biological self-purification of the activated carbon coated revetment block(ACRB) and existing revetment block(RB). Two reactors of pilot plant were used in this experiment and the comparative study ACRB and existing RB without activated carbon was applied to plant of cycle type-stream. The influent used synthetic water mixing secondary effluent of wastewater treatment plants and stream water. Experiments were operated by separating (Mode1, 2, 3) at low concentrations, middle concentration, high concentration. According to the experiment, biofilm are formed thicker at the Mode 3 substrate concentration of the influent. Result of analysis, the water quality by the removal rate of microorganisms per substrate, is very effective for the removal of BOD, the substrate removal rate of the ACRB is higher than the RB. As a result, ACRB was found that it is possible to improve substrate removal capability friendly environment using microorganisms, to improve the ability of self-purification of river than the RB.

상수처리 : 상수원수 전처리 및 고도처리를 위한 생물막 여과공정의 처리특성에 관한 연구

강용태 ( Yong Tae Kang ),안성환 ( Seong Hwan An ),조용현 ( Yong Hyun Cho ) 대한상하수도학회 2004 공동추계 학술발표회 논문집 Vol.2004 No.-

상수처리 : 상수원수 전처리 및 고도처리를 위한 생물막 여과공정의 처리특성에 관한 연구

강용태 ( Yong Tae Kang ),안성환 ( Seong Hwan An ),조용현 ( Yong Hyun Cho ) 한국물환경학회 ( 구 한국수질보전학회 ) 2004 공동 추계학술발표회 Vol.2004 No.-

총인 제거를 위한 상향류 Biobead^® 공정에서 PACl 주입량에 따른 처리특성

조용현 ( Yong-hyun Cho ),한상윤 ( Sang-yun Han ),안성환 ( Seong-hwan An ) 한국환경기술학회 2013 한국환경기술학회지 Vol.14 No.1

본 연구는 직접여과(응집+여과)공정이 도시하수 2차 처리수를 효과적으로 인을 제거하는 방법에 대한 연구를 수행하였다. 따라서 SS, 탁도, COD, PO₄-P의 처리특성들이 수행되었다. 실험결과를 요약하면 다음과 같다. SS제거율은 여과속도가 낮을수록 PACl 주입에 따른 SS 제거효과는 큰 것을 알 수 있었고 PACl 주입몰비가 1에서 3까지 증가시킴에 따라 COD 제거효율이 상승하였고 이는 유입수의 SS농도가 저 농도임에도 불구하고 SS 제거율이 약 90%까지 나타났고, SS의 안정적인 제거로 입자성 COD성분이 일정하게 제거된 것으로 판단되며, 용해성 COD는 PACl에 의해서 잘 제거 되지 않은 것을 알 수 있다. 여과속도가 약 75m/day 로 운전되었을 때 주입몰비와 PO₄-P 제거율의 관계에서 PO₄-P처리효율은 2.9009Mol ratio+83.597로 나타났으며 약150m/day의 여과속도에서는 PO₄-P처리효율은 5.8281Mol ratio+63.486로 나타나 각각 90.41%, 88.63%의 높은 상관관계를 가졌다. This research investigated whether the direct filtration process(coagulation+upflow filtration with floating filter medium) was an efficient treatment method for phosphorus removal from secondary effluent of municipal wastewater treatment plant. Thus treatment characteristics study was performed such as SS, Turbidity, COD, PO₄-P. The summary of the test is below; When the filtration rate is decreased, SS removal rates are increased with PACl addition. As following the PACl addition molecular rate are increased from 1 to 3, COD removal rate is also increased. Even influent SS concentration is low, SS removal rate was 90%. Due to the reliable removal of SS, COD substance have been removed constantly. It was said that soluble COD was not well removed by PACl. When the filtration rate was 75m/day, PO₄-P removal efficiency was 2.9009Mol ratio+83.597 and the PO₄-P removal efficiency was 2.9009Mol ratio+83.597 at the filtration rate was 150m/day. It can be seen that it had very high correlation as 90.41% and 88.63% respectively.

회전근개 섬유모세포의 저산소증, 세포자멸, 그리고 산화 스트레스

박형빈(Park Hyung Bin),김라정(Kim Ra Jeong),안성환(An Seong Hwan),하영술(Hah Young-Sool) 대한견주관절의학회 2017 대한견주관절학회 학술대회논문집 Vol.2017 No.3

MLSS 변화에 따른 MASA 시스템의 특성 연구

김연은 ( Yun-eun Kim ),조용현 ( Yong-hyun Cho ),안성환 ( Seong-hwan An ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.2

하수처리에 있어서 질소 제거는 수처리 환경 보전에 중요한 부분을 차지한다. 본 연구의 목적은 단계유입혐기호기공법에 MAB를 적용한 MASA 시스템에서 MLSS 변화에 따른 수질 항목 처리특성을 알아보고자 하는 것이다. 실험 결과, MLSS 농도변화에 따른 Mode A, B, C조건에서 SS, BOD, COD의 최대 제거효율은 각각 98.94%, 96.59 %, 99.03 %로 나타났으며 MLSS가 높아질수록 유기물 제거효율이 증가되는 것으로 판단된다. 활성슬러지의 농도 증감에 따라서 NH₄⁺-N가 최대 98.88 % 제거되었으며 생물학적 산화반응을 촉진 및 저해하기 때문에 MLSS 농도변화가 NH₄⁺-N의 제거율에 영향을 미치는 것으로 판단된다. Mode별 T-N 평균 제거효율은 85.37∼93.58 %로 나타나 NH₄⁺-N와 유사한 경향을 보였다. T-P 제거는 MLSS 농도가 2,000 mg/L에서 최대 제거율이 93.29 %로 나타났으며 T-N과 유사하게 MLSS 농도변화에 반응적으로 나타난 것으로 판단된다. The aim of this research is to evaluate characteristics of water quality parameters efficiency according to change of MLSS by MASA system(Modified ASA system) applying MAB procedure to aerobic reactor and reaerobic reactor of Advanced Step Aeration system. Removal efficiencies of SS, BOD, COD up to 98.94 %, 96.59 %, 99.03 % in conditions Mode A, B, of C following variation of the MLSS concentration, respectively. It is determined that the organic removal efficiency is being improved as the MLSS increases. NH₄⁺-N is removed 98.88 % in response to an increase or a decrease in the concentration of activated sludge. It is determined to inhibit and promote biological oxidation, MLSS concentration changes affect the removal rate of the NH₄⁺-N. Average TN removal of mode A,B,C efficiency was 85.37∼93.58 %, that showed the same tendency with NH₄⁺-N. Mode C (MLSS 2,000 mg/L) showed 93.29 % of T-P average treatment efficiency. As with TN, it is determined that shown in reaction to changes in MLSS concentration.

ASA공법에서 MAB(Membrane Attached Biofilm)의 적용성 평가

김연은 ( Yun-eun Kim ),조용현 ( Yong-hyun Cho ),안성환 ( Seong-hwan An ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.1

본 연구는 고도 단계 유입 혐기호기공법(ASA: Advanced Step Aeration)에 MAB(Membrane Attached Biofilm)를 적용한 MASA(Modified ASA system)시스템을 이용하여 질산화, 탈질 및 인제거 효율을 개선시키고자 하였다. Pilot-scale의 실험 장치를 통해 MAB의 침적위치에 따른 Mode 1(호기조), Mode 2(재호기조), Mode 3(호기조와 재호기조)의 조건으로 운전되었으며 그에 따른 최적위치 선정과 유출수의 수질항목별 처리특성을 파악하였다. 실험 결과, 호기조와 재호기조에 MAB를 적용한 Mode 3의 경우가 최적 운전 조건이었으며 수질항목별 처리특성은 평균제거율이 SS 98.00 %, BOD 95.64 %, COD_Cr 98.14 %, NH₄⁺-N 98.38 %, T-N 87.80 %, T-P 92.00 %으로 나타났다. T-N의 경우 14.30 %, NH₄⁺-N 15.88 %까지 평균제거율이 상승함으로 효율적인 처리가 이루어졌다. In this study, a pilot - plant experiment was conducted to improve the nitrification, denitrification and phosphorus removal efficiency by using MASA (Modified ASA system) system where MAB (Membrane Attached Biofilm) is applied to ASA: Advanced Step Aeration. And the best deposition location of MAB was selected and treatment characteristics according to water quality categories were identified with Mode 1, Mode 2, Mode 3 by depositing MAB (Membrane Attached Biofilm) in the aerobic reactor, reaerobic reactor and simultaneously in the aerobic reactor, reaerobic reactor. Experiment results showed that Mode 3 was the best operating condition where MAB was applied in aerobic reactor and reaerobic reactor and treatment characteristics according to water quality categories had the average removal rates of SS 98.0 %, BOD 95.64 %, COD_Cr 98.14 %, NH₄⁺-N 98.38 %, T-N 87.8 %, and T-P 92.00 %. In case of T-N, efficiency of biological nitrogen removal could be identified to be reduced because efficient treatments were made, as the average removal rates increased up to 14.3 %, NH₄⁺-N 15.88 %.