단일정 주입 추출법을 이용한 질산성질소오염 지하수의 현장 생물복원을 위한 탈질율 결정

어성욱,김영,김건하 한국폐기물자원순환학회 2005 한국폐기물자원순환학회지 Vol.22 No.7

양돈 퇴, 액비의 수질환경 영향분석을 위한 영양물질 이동경로 연구

어성욱 한국습지학회 2011 한국습지학회지 Vol.13 No.3

액비와 퇴비 형태로 발생되어지는 양돈 분뇨는 발생량의 대부분이 농지에 적용되어지고 있다. 과잉으로 적용된 양돈 퇴, 액비는 수계의 영양소 과잉의 주원인으로 알려지고 있는데 양돈 퇴, 액비의 질소, 인 물질이 농지로부터 지표수와 지하수로 전달되어지는 경로를 파악하는 것이 본 연구의 주목적이다. 인공 강우 시험을 통해 농지로부터 양돈 퇴비와 액비가 각각 적용되어진 농지에 대해 지하수와 지표수로 유출되는 양을 조사하였는데 질소의 경우 지하수로 유출되는 부분이 가장 많은 반면 인의 경우 토양에 흡착되는 부분이 가장 많은 것으로 나타났다. 토양에 대한 인의 평균 흡착 양은 21.5 mg P/kg soil 로 나타났다.

경유류로 오염된 지반의 오염범위 산정 및 복원공법 제시

어성욱,손봉호,손민식,Eo, Seong-Uk,Son, Bong-Ho,Son, Min-Sik (사)한국토질및기초기술사회 2008 지반과 기술 Vol.5 No.2

SBR 공정을 이용한 분뇨, 축산 혼합폐수의 영양소 제거

어성욱 우송대학교 2000 우송대학교 논문집 Vol.5 No.-

This study was conducted to determine the optimum mixing ratio and operating parameter in which treating nightsoil and piggery waste water in nightsoil treatment plant. The treatment of mixed waste water (nightsoil + piggery waste water) gives many advantages. It was possible to avoid duplicated of investment to waste water treatment system. Futhermore it improves nutrient removal efficiencies. Optimum Mixing ratio was revealed one nightsoil to three piggery waste in proportion to flow rate and other operating parameters obtained are summarized as follows ; 1) Optimum HRT of treating mixed waste water determined at 10 days. 2) Nitritation and denitritation was the cause of high concentration of NH₄-N, and these incomplete nitrification was to easy to complete nitrogen removal in treating low carbon source waste water. 3) The treatment of mixed waste water was possible to get the high nitrogen removal efficiencies. During the operation period of optimum HRT, from 95% to 100% total nitrogen removal could obtained. 4) By the treatment of mixed waste water, phosphorus removal efficiencies improved about 20% than treating piggery waste water separately.

활성슬러지 포기조에 직접 응집제 주입법에 의한 질산화의 영향

어성욱 우송대학교 부설 산업연구원 1999 산업연구 Vol.1 No.1

Industrial wastewater effluent standards were revised recently including the limitation of CODmn newly, it is required the cut-down of Non-Biodegradable COD(NBDCOD) for industrial effluent. So, industrial wastes including high NBDCOD should be treated by an advanced oxidatioin process. For the treatment of concentrated industrial wastewater and cut-down of NBDCOD, activated sludge process following chemical coagulation and sedimentation is the most common process in Korea. Most of industrial wastewater treatment plant was under restraint of space and economical condition, the easiest modifying method to advanced treatment is direct applying coagulant to aeration basin. This study was conducted to evaluate the toxicity and treatability of coagulant applied to aeration basin of activated sludge process. It is well-known that nitrosomonas and nitrobacter were the most sensitive microbes to the toxic substances in the activated sludge microbes. Thus, measurement of nitrification rate is one of the way able to find the toxicities of coagulants to activated sludge microbes. Direct application to aeration basin 40 to 80 ppm of aluminium sulfate(Al₂(SO₄)₃·18H₂O) have no effect on full nitrification. All over the operating period, TKN removal efficiency was obtained from 80 to 85%. CODmn removal efficiencies could obtained to 28% in case of jar-test coagulation for the biological effuent, removal efficiency was able to obtain to 56.6% in that case of direct application to aeration basin. Increasing sludge production and deterioration of sludge dewaterbility are the pending task that have to settle down.

분뇨의 영양소 제거

어성욱,최의소 대한환경공학회 1993 대한환경공학회 학술발표논문집 Vol.1993 No.12

가축분뇨 자원화 처리시 수질오염물질 삭감율 산정 연구

어성욱 한국물환경학회 2017 한국물환경학회지 Vol.33 No.6

Livestock manure is known as the main cause of non-point pollutant in agricultural area. Pollutant reduction ratio of livestock manure recycling to fertilizers was measured in order to analyze the effect on water quality of Total Maximum Daily Load (TMDL) system in Korea. The reduction ratio has been applied by theoretical consideration without survey and there is no value for TOC newly introducing organic item. The reduction ratio of each pollutant from this study was revealed as follows; TOC, BOD, T-N and T-P were 0.34, 0.60, 0.37, and 0.42 for individual farm and 0.38, 0.61, 0.45 and 0.44 for entrustment facilities, respectively. The reduction ratio of individual farm was surveyed as TOC 0.63, BOD 0.62, T-N 0.42 and T-P 0.32 for liquid fertilizer and TOC 0.30, BOD 0.64, T-N 0.40 and T-P 0.48 for compost. Total reduction ratio was derived by multiplying the ratio for liquid fertilizer and compost by the respective load. Compared to the pollutant reduction ratio of the individual farm with entrustment facilities marking the higher in liquid fertilizer and the lower in compost. Through this study, we found the difference of pollutant reduction ratio between livestock manure recycling method and facilities. Although phosphorus known as a preservative matter, the treatment efficiency of T-P is analyzed to decrease by chemical precipitation.

인공 저류지를 이용한 축산 지역 비점오염물질 유출 저감 효율 분석

어성욱 한국습지학회 2018 한국습지학회지 Vol.20 No.4

It analyzed the efficiency of the runoff reduction of artificial reservoir by analyzing the influent and effluent of reservoir located downstream of the livestock area. Production of non point pollutants in livestock feeding areas, which is located at steep slope land, was mainly due to first flushes. Suspended Solid concentration of influent increased due to amount of rainfall, and T-P also increased over four times and 30 % of total nitrogen increased on average compared to those of dry season. While the concentration of nitrate nitrogen showed little variation, ammonia nitrogen increased over two times. The storage style nonpoint reduction facility showed the highest removal efficiency of 53 % for total phosphorus in dry weather, when the removal efficiency was 37 % for suspended solids, 10% for organic compounds, and 5 % for total nitrogen. Since algal bloom grows due to eutrophication in summer, the minus removal efficiencies of nitrogen concentration through the reservoir occurred with high frequency. Removal efficiency decreased during rainfall, showing 60 % for supended solids, and 22 % for total phosphorus. While having over nine times of capacity than the standard of non-point removal facility from Ministry of Environment, it was impounded with water during rainy season, showing not enough nonpoint removal efficiency, which indicates that maintenance is also an important factor to the nonpoint removal efficiency. 축산 지역 하류에 위치한 농업용 저수지의 강우시 유입, 유출수 분석을 통해 축산지역의 강우 유출 특성과 저류지에의한 축산계 비점 오염물질의 저류형 시설에 의한 유출 저감 효율을 분석하였다. 급경사지에 위치한 한우 축산 지역의비점 오염물질 유출은 주로 초기세척현상에 의해 발생됨을 알 수 있었으며 강우시의 유입수 농도는 비강우시에 비해SS농도가 가장 높게 발생하고 있으며 T-P도 4배 이상 증가하는 양상을 보인다. 반면 총질소는 평균 30% 증가하는 것으로나타나는데 질소항목으로 보면 질산성 질소는 거의 변화가 없는 반면에 암모니아성 질소가 2배 이상 증가하고 있다. 저류형 비점 제거시설 효율 분석 결과 비강우시 총인 제거효율이 53%로 가장 높고 부유물질은 37% 제거되고 있다. 유기물질은 10% 내외, 총질소는 5% 이내로 제거되며 부영양화로 녹조가 번성하는 하절기에는 오히려 유출수의 질소농도가 더 높아지는 경우도 빈번히 발생하고 있다. 강우시의 유입수 농도는 비강우시에 비해 SS농도가 가장 높게 발생하고있으며 T-P도 4배 이상 증가하는 양상을 보인다. 강우시 부유물질의 제거효율은 60%로 나타나고 있으며 총인은 22% 제거되어 비강우시에 비해 제거효율은 감소하고 있다. 환경부의 비점제거시설 기준보다 9배 이상의 용량을 지니고 있지만비점 전용 시설로 활용되지 못하는 탓에 장마철에 거의 만수 상태로 담수하여 비점제거 효율에 있어서는 충분한 효과를보이지 못하고 있는 것으로 나타나 저수지의 용량 뿐 아니라 수문관리 등 유지관리도 비점 제거효율에 영향을 미치는중요 인자로 분석되었다.

지하수 내의 질산성 질소 제거를 위한 최적 전자 공여체 선정에 관한 연구

어성욱 우송대학교 2004 우송대학교 논문집 Vol.9 No.-

The frequent contamination compound of groundwater is nitrate that exceed rate is increasing in rate of 10 mg NO₃^(-)-N/L drinking water level. To determinated proper carbon source and output injection mass for In-situ bioremediation of nitrate contaminated groundwater using substrate that fumarate, acetate, formate, lactate, propionate, and ethanol, methanol. These are compared nitrate removal efficiency and rate about difference substrate. Denitrification rates from the highest to the lowest are as follows : fumarate > hydrogen> formate and lactate > ethanol > propionate > methanol > acetate. Microcosm studies were performed both the highest and lowest of efficiency that fumarate and acetate among the screening substrate. Fumarate was shown nitrate removed 100 percent and quickly removed rate of 0.66mmol/day, conversion rate was 87 percent nitrate to nitrogen gas or another by-product. The injection mass needed 42mg when remove 30 mg NO₃^(-)-N/L. Acetate was removed 31 percent of nitrate for initial adjustment period. But that was removed 83 percent of nitrate according as cell growth. That was lower than fumarate as the nitrate removal rate of 0.37mmol/day. Acetate was long lag time using nitrate at the case study, so evaluated effective substrate as fumarate that growing denitrifer cell better than acetate.

양돈 퇴, 액비 내 중금속 및 항생제의 토양 흡착특성 연구

어성욱 한국습지학회 2012 한국습지학회지 Vol.14 No.3

양돈 농가에서 구리, 아연 등의 성장촉진제와 항생제들이 사료 첨가제로 사용되는데 사료에 주입된 많은 양이 분뇨로 배설되고 있다. 국내 양돈 폐수의 90% 이상이 퇴, 액비 형태로 농지에 적용되고 있는 상황에서 퇴, 액비 내에 함유된 중금속과 항생물질은 토양에 흡착되어 농지에 잔류하거나 지하수나 지표수로 유출되어 수계로 빠져나간다. 농지에 살포된 중금속과 항생물질의 토양 내에서의 거동을 살펴보기 위해 실험실 기초 실험을 수행 하였는데, Jar test와 칼럼 용출 실험을 수행하였다. 실험결과 아연의 86.4와 구리의 68%가 토양에 흡착되는 것 으로 나타난 반면, 액비에 포함된 항생물질의 60% 이상은 칼럼 유출수로 용출되는 것으로 나타났다.