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합류식 하수관거내 퇴적물이 CSOs에 미치는 영향 및 제어방안
임봉수 ( Bong Su Lim ),김도영 ( Do Young Kim ),이광춘 ( Kuang Chun Lee ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.1
This study is selected two points of combined sewer that occurred Fish Kill after first flush, that analyzed generation of pollutants and stream runoff generation of combined sewer overflows (CSOs) as fine weather and rainfall. In addition, this study was to analyze the relationship between CSOs and sediments, to propose measures to reduce the sediment relevant with CSOs and rainfall runoff from entering sewage treatment plants and measures for discharged directly into streams when indicate relatively good water quality after overflow. Sediments in combined sewer system was discharged about 50~80% as overflows during rainfall and we can reduce the amount of the CSOs at least 50% or more if the sewer does not exist in the sediments because of the amount of discharge about the amount of intercept has been investigated by 3~5 times. Because of velocity at sediment interval in sewer is very low, sewage velocity of about 3~5 times as much as it can increase the amount of sediment can be reduced if the separation wall is installed. Effective control of BOD overflow load is respectively 77.5%, 75.8% at first point, second point by the separation wall is installed. Drainage area greater than area in this study or many combined sewer overflows region is increased the more effective control of separation wall. Turbidity to measure changes in water quality of overflows can be used as an factor to control the intercept flows because the intercept flows(3Q) after the first flush has lowered removal efficiency and increases the operational load of sewage treatment plants. Sewage water quality after a overflow when the reasonable turbidity was measured at this point flows to excluded intercept flow(1Q) can be discharged to stream.
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임봉수(Bong-Su Lim),신동호(Dong-Hao Shen),신형철(Heng-Zhe Shen) 대전대학교 환경문제연구소 2013 환경문제연구소 논문집 Vol.17 No.-
This study was to look out a better water quality of Tumen river by observing the variation of quality and causes of pollution for 30years since 1977 the negotiations between China and North Korea to present. China decreased industrial wastewater discharge and COD load by 71% and 94%, respectively through constant efforts since negotiation to present. But Tumen river is a boundary river so that the water quality should not be solved only by China. As the economics of North Korea recovers, industrial wastewater will be a big problem for a potential risk factor and it must to resolve by the negotiation between two countries. The main pollution sources in China are Chenming paper industry company, Shixian paper industry company and the urban sewage by population growth of Yanbian. Beneficiation wastewater of Musan iron mine has become a big SS pollution problem, and industrial wastewater including the strong organic matter and volatile phenol from Aoji chemistry company would have been a problem in North Korea. According to the ‘12.5’planning to improve water quality in Tumen river, the government planned bad V class(worse than 40mg/L COD) which occupies 9.7% of the water quality area presently to less than V class, and I~III class which occupies 71% to more than 80%. Construction of sewage treatment plants should be urgently needed in Yanji, Hunchun and 5 other cities.
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임봉수(Bong-Su Lim),경해룡(Hai-Long Jing),육복철(Bok-Cheol, Youk) 대전대학교 환경문제연구소 2014 환경문제연구소 논문집 Vol.18 No.-
The purpose of this study is to provide the data for sewage policy by selection of demending section and priority for interceptor renovation in Daejeon Metropolitian City. The order of priority for interceptor renovation in this city is Daejean-cheon, Youdeng-cheon, Gab-cheon, Youseong-cheon and Jinjam-cheon. Length of demanding section for renovation is 5.6 km for Daejean-cheon, 11.9 km for Youdeng-cheon, 13.8 km for Gab-cheon, 10.4 km for Youseong-cheon, and 3.9 km for Jinjam-cheon, respectively. The total length for interceptor renovation is 45.6 km. Assuming 30% as partial repair and 70% total repair on trenchless replacement, total renovation cost is calculated 98.2 billion won, 3.5 billion won for Daejeon-cheon, 1.2 billion won for Jinjam-cheon, 49.7 billion won for Gab-cheon, 4.3 billion won for Youseong-cheon, and 39.5 billion won for Youdeng-cheon.
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임봉수(Bong Su Lim),어성욱(Seong Wook Oa),정원문(Won Moon Chung) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.4
This study was carried out to develop the new process for RBC process which is capable of nutrient removal and to obtain its design parameters for Sludge Settling Type Rotating Biological Contactors by comparing RBC with RBC combined with HBR (Hanmee Bio-Reactor). To achieve more than 90% of organic removal efficiency, organic loading rate less than 6.0g BOD/㎡/d is recommended. Nitrification rate was about 90% at 6.0g BOD/㎡/d. TN removal efficiency of RBC+HBR was higher than those of RBCl and RBC2. TN removal efficiency at condition of 5.0g BOD/㎡/d was about 60% in RBCl. When BOD loading rate was 6.0g BOD/㎡/d, TN removal efficiencies in RBC2 and RBC+HBR were about 70%, 80%, respectively. TP removal efficiency was more than about 67% for RBC1, about 63% for RBC2 and about 71% for RBC+HBR at the same loading rate. From the blank experiment to observe removal efficiency in the first stage, it can be known that COD removal efficiency was about 30% and suspend solids settling rate was about 45%. It was proved that RBC+HBR is much better in sludge dewatering than RBC.
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