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생물학적 황산염 환원을 이용한 금속광산 갱내수의 중금속 제거
임재명,이찬기,한동준 ( Jay Myoung Rim,Chan Ki Lee,Dong Joon Han ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.2
A laboratory experiment was performed to investigate the mine drainage treatment using the biological sulfate reduction. An acetate-added synthetic wastewater was used because of low organic content in the acid mine drainage. The presence of heavy metals in the synthetic wastewater was an operational variable for the laboratory experiment. On the basis of series of experiment, it was found that the sulfate reduction rate and organic removal rate increased with an increment of hydraulic retention time in the laboratory reactors. It was also note that the reactor fed with wastewater containing heavy metals showed a better performance. It was reasoned that the reduction of sulfide(S^2) toxicity due to the heavy metal complexation, resulting an enhanced microbial activity in the reactor fed with wastewater containing heavy metals. Total removal rate of heavy metals in the lab reactor was highly correlated with the sulfate reduction rate, and the sulfate reduction rate was closely related with COD removal rate. In addition, an order of heavy metal removals during the sulfate reduction was found as follows : Zn>Pb>Co>Ni>Cu.
多點 피토관 流量計 周圍의 流動特性에 관한 실험적 연구
임재명,윤복현 木浦大學校 工業技術硏究所 2000 工業技術硏究誌 Vol.10 No.-
The flow characteristics passing a multi-point Pitot tube flow-meter with diamond shape were experimentally studied. ISA 1932 nozzles were used in order to measure average velocities in the pipe. A model of the same shape as the multi-point Pitot tube flow-meter with several holes perforated on its side was manufactured and tested to obtain pressure distributions around the test-piece. The combination of upstream double elbows varies the velocity profile and the position of maximum velocity and produces secondary flows and swirl. Especially, in case of 90˚ double elbows combination, swirl showed its maximum strength and anti-symmetric flow was also detected. The position of separation occurred at the same point all the time, in spite of various combinations of double elbows and for the entire range of Reynolds number tested in this study.
생물학적 황산염 환원올 이용한 금속광산 갱내수의 증금속 제거
임재명,이찬기,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-
A laboratory experiment was performed to investigate the mine drainage treatment using the biological sulfate reduction. An acetate- added synthetic wastewater was used because of low organic content in the acid mine drainage. The Presence of heavy metals in the synthetic wastewater was an operational variable for the laboratory experiment. On the basis of series of experiment, it was found that the sulfate reduction rate and or-ganic removal rate increased with an increment of hydraulic retention time in the laboratory reactors. It was also note that the reactor fed with wastewater containing heavy metals showed a better Performance. It was reasoned that the reduction of sulfide(S^(2-)) toxicity due to the heavy metal complexation, resulting an enhanced microbial activity in the reactor fed with wastewater containing heavy metals, Total removal rate of heavy metals in the lab re-actor was highly correlated with the sulfate reduction rate, and the sulfate reduction rate was closely related with COD removal rate. In addition, an order of heavy metal removals during the sulfate reduction was found as follows : Zn >Pb >Co>Ni>Cu
임재명,성낙창,박광현 동아대학교 환경문제연구소 1988 硏究報告 Vol.11 No.1
This study has been carried out to evaluate the ability of sequential batch reactor process for the removal of NH₄^(+)-N in wastewater. The results of this study are summerized as following : 1. For the operation mode A the NH₄^(+)-N removal efficiencies were around 90%, and for the operation mode B, they were 70-90%. 2.NH₄^(+)-N oxidation rates were 0.045-0.43 d^(-1) and 0.005-0.19 d^(-1) for operation made A and B respectively. The nitrification rates were calculated to be 0.0085-0.004 d^(-1) for operation mode A. For operation made B, the maximum nitrification rate was found to be occurred when the ratio of filling to reaction was 2/4. 3. For operation made A denitrification rates were 0.005-0.04 d^(-1) and 0.002-0.27 d^(-1) during the filling and anoxic period respectively. For operation mode B denitrification rates were 0.006-0.011 d^(-1) and 0.004-0.006 d^(-1) during the filling and anoxic period respectively.
임재명,한동준 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-
This research aims to develop biofilm process for the nutrient removal of piggery wastewater. The developed process is the four stage anoxic-oxic biofilm process with recirculation of the final effluent. In summery, the results are as follows:1.Nitrigication in the piggery wastewater built up nitrite because of the high strength ammonia nitrogen The nitrigication of nitrobacter by free ammonia was inhibited in the total ammonia nitrogen loading rate with more than 0.2kgNH_(3)-N/㎥·d 2.The maximal total ammoria nitrogen removal rate was obtained 22℃ and without being affected by the loading rate. But oxidized nitrogen production rate was largely affected by loading rate. 3.Autooxidation by the organic limit was cause of the phosphorus release in the aerobic biofilm process. But the phosphorus removal rate was 90 percent less than the influent phosphorus volumetic loading rate of above 0.1kgNH_(3)-N/㎥·d Therefore the phosphorus removal necessarily accompanied the influent loading rate. 4. On the anoxic-oxic BF process the total average COD mass balance was approximately 67.6 percent. Under this condition the COD mass removal showed that the cell synthesis and metablism in aerobic reactor was 42.8 percent and that the denitrification in anoxic reactor was 10.7 percent, respectively.