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박대원,정진영,정윤철,윤운영 ( Dae Won Park,Jin Young Jung,Yun Chul Chung,Woon Young Yun ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.2
Experiments were conducted to investigate the effect of MLSS concentration on the performance of a sequencing batch reactor (SBR) treating industrial wastewater containing high concentration of organics and nitrogen. Three laboratory-scale reactors were designed and operated at different MLSS concentration. Total organic carbon and nitrogen concentration in the reactors were monitored over reaction time. The higher MLSS concentration in the reactor resulted in the greater COD removal rate with up to 1.24㎏ COD/㎥.day. The higher MLSS concentration resulted in the lower TOC concentration in the effluent. It was observed from monitoring ammonia in the reactor that the higher MLSS concentration in the reactor resulted in the higher rate of ammonia oxidation and the earlier production of NO₃-N. MLSS concentration was observed to be an important factor determining removal rate of organic and ammonia
양돈폐수처리시 실규모 이단 혐기성공정의 성능 및 메탄회수
정진영 ( Jin Young Jung ),정윤철 ( Yun Chul Chung ),강신현 ( Shin Hyun Kang ),정형숙 ( Hyung Sook Chung ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.3
The purpose of this study is to investigate the performances of organic removal and methane recovery by using a full scale two-phase anaerobic system. The full scale two-phase anaerobic process was consists of an acidogenic anaerobic baffled reactor (ABR) and a methanognic upflow anaerobic sludge blanket (UASB) reactor. The volumes of acidogenic and methanogenic reactors were designed to 28.3 ㎥ and 75.3 ㎥. The two-phase anaerobic system represented 60-82% of COD removal efficiency when the influent COD concentration was in the range of 7,150 to 16,270 ㎎/L after screening (average concentration is 10,280 ㎎/L). After steady-state, the effluent COD concentration in the methanogenic reactor showed 2,740±330 ㎎/L by representing average COD removal efficiency was 71.4±8.1% when the operating temperature was in the range of 19-32℃. The effluent SCOD concentration was in the range of 2,000-3,000 ㎎/L at the steady state while the volatile fatty acid concentration was not detected in the effluent. Meanwhile, the COD removal efficiency in the acidogenic reactor showed less than 5%. The acidogenic reactor played key roles to reduce a shock-loading when periodic shock loading was applied and to acidify influent organics. Due to the high concentration of alkalinity and high pH in the effluent of the methanogenic reactor, over 80% of methane in the biogas was produced consistently. More than 70% of methane was recovered from theoretical methane production of TCOD removed in this research. The produced gas can be directly used as a heat source to increase the reactor temperature.