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RISS 인기검색어
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- 저자 : 이영대 ( Yong Su Choi (검색결과 5 건)
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이영대(Young Dae Lee),최용수(Yong Su Choi),윤현식(Hyun Sik Yoon),홍석원(Seok Won Hong),주봉현(Bong Hyeon Joo) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.3
A pilot-scale (50 ㎥/day) of a single sludge reactor, which contains an anaerobic, anoxic, and aerobic reaction zone in a cylindrical single reactor, was evaluated. This process has been developed and designed to remove nutrients as well as organic matters in a single sludge reactor. During the experimental period, special attempts were made to quantify nitrification and denitrification efficiencies and to evaluate factors affecting the performance of nitrogen removal. In the case of removing nitrogen, which consists of nitrification and denitrification reaction under steady-state conditions, the results indicated that seasons` variation of the temperature was a major factor affecting the performance of the nitrogen removal.
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최용수,신응배,이영대 ( Yong Su Choi,Eung Bai Shin,Young Dae Lee ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.3
Experimental study for the removal of organic and phosphorus in synthetic wastewater was conducted in a single reactor including anaerobic-anoxic-aerobic zone and clarifier. Attempts were made to delineate phosphorus removal mechanisms and to evaluate the removal efficiencies of organic and phosphorus with different internal recycle ratios, N/P ratios and various SRT conditions. The removal efficiencies of TOC, BOD and COD were observed to be higher than 95%, 90% and 90% respectively with aerobic recycle rates of 100% and 200%. It was recognized that the optimal operational condition for phosphorus removal was the aerobic internal recycle rate of 100% with the inlet fraction 0.2. The percent removal efficiencies were 92.1% for T-P and 90.1% for PO-4-P. While, large differences in the removal of phosphorus with N/P ratios were observed; at influent TKN/T-P of 2.5, 3.6 and 5.1, removal efficiencies for T-P were 88.7%, 67.6% and 55.9%, respectively. Those removal efficiencies decreased with the increase of N/P ratio in wastewater charged. In case of SRT, removal rates of 93.5% for T-P and 92.1% for PO₄-P were observed with the solid retention time of l0 days. These rates are higher than results in 5 days and 20 days of SRT. Thus high removal efficiencies for organic substances and phosphorus in wastewater were simultaneously obtained by a new biological process with a single reactor.
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윤현식(Hyun Sik Yoon),최용수(Yong Su Choi),이영대(Young Dae Lee),홍석원(Seok Won Hong),정익재(Ik Jae Chung) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.2
In general a waste activated sludge is biologically stabilized by either aerobic or aerobic digestion. Typical problems associated with these two processes include high energy requirement, capital cost, and high load to the main wastewater treatment process due to returned digestion supernatant. To overcome these problems in conventional digestion processes, the intermittently aerated sludge digestion, which is operated under combined aerobic and anoxic condition, has been studied for another alternative. In order to understand the behaviors of nutrients in a supernatant of sludge digestion, intermittently aerated batch and continuous digestion experiments were investigated in this study. In a batch digestion, it is shown that nitrogen and phosphorus concentration in the intermittently aerated digestion are less than those in controlled batch digestions: anaerobic digestion without air supply and aerobic digestion with continuous air supply. The endogenous nitrate respiration following the nitrification and the P-uptake by the residual microbes are alternatively occurred in the intermittently aerated digestion. In the continuous digestion, nitrogen and phosphorus concentration in the effluent were examined under air on/off operating condition.
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生物學的 燐除去機轉 및 內部返送率과 SRT가 除去率에 미치는 影響
신응배,이영대,최용수,이정욱 漢陽大學校 環境科學硏究所 1995 環境科學論文集 Vol.16 No.-
본 연구에서는 생물학적 인 제거공정의 혐기-호기-무산소 조건을 단일 반응조내에서 발생토록 고안하여 인제거 실험을 수행하였으며, 고안된 반응기내에서의 인 제거기전을 규명하고 제거효율을 평가하였으며 또한 내부반송율과 SRT 변화에 따른 유기물과 인제거 효율을 평가하였다. 고안된 공정의 종합적 인제거효율 평가를 통해 최적 운전조건을 평가·분석하였다. 실험 결과 유기물 제거율은 Aerobic recycle rate 100%, 200%에서 TOC 95% 이상, BOD와 COD 90% 이상으로 우수하였으며, 인은 Aerobic recycle rate 100%에서 폐수유입 지점 0.2일 때가 최적조건으로 분석·평가되었다. SRT 변화와 T-P, PO₄-P 제거율과의 관계는 SRT 10일에서 94%, 92% 이상으로 높은 제거효율을 나타내었다. In this investigation, phosphorus removal experiment was conducted in a single reactor combining anaerobic-aerobic-anoxic zone. Attempts have been made to delineate phosphorus removal mechanisms and to evaluate the removal efficiency. Also performed in this experiment are the removal characteristics of organic and phosphorus with different internal recycle ratios and varying SRT conditions. In addition, this study evaluates the best operation conditions in terms of phosphorus removal efficiency. The removal efficiencies of TOC, BOD and COD were observed to be higher than 95%, 90% and 90%, respectively with aerobic recycle ratios of 100% and 200%. If is further estimated that the optimal operational conditions for phosphorus removal are observed when the aerobic internal recycle rate is 100% with the wastewater inlet point being 0.2 from the bottom. The percent removal efficiencies are 92% for T-P and 90% for PO₄-P. In case of SRT, higher removal efficiencies are observed with the solid retention time of 10 days than with SRT's of 5 and 20 days. The removal rates observed are 94% for T-P and 92% for PO₄-P with the solid retention time of 10 days.
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