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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.
우수토실에 설치된 월류수 제어를 위한 유입유량조절장치의 개선효과
임봉수 ( Bong Su Lim ),박윤해 ( Youn Hae Park ),김태응 ( Tae Eung Kim ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.4
This study was carried out to evaluate the performance of a inflow controller for the control of combined sewer overflows (CSOs). Because of the inflow controller could be adjusted manually by predicting the maximum amount of peak flow, the mechanical adjustment of this controller was higher than the existing fixed-type controller in field application. Standardizing the relationship between the flow and the clearance and angle of an inlet cover plate on the inflow conditions can selected to the optimum conditions for the on-site. It was concluded that BOD pollutant loading at the region in which inflow controller was installed had shown the removal efficiency rate of 42%.
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.
우오수분리벽을 이용한 분류식 하수관거의 월류수에 대한 영양염류 제어효과
임봉수(Lim, Bong-Su),박상현(Park, Sang-Hyun),조병욱(Cho, Byung Wook),이광춘(Lee, Kuang-Chun) 대전대학교 환경문제연구소 2008 환경문제연구소 논문집 Vol.12 No.-
This study is to evaluate control effects of separation wall by surveying water quality and sewer overflows during dry and wet periods in combined sewer and separated sewer systems. Ravine water from the combined Seokgyo outfall with the separation wall was separated about four times larger than sewage flow during dry periods. The water quality of the combined Seokgyo outfall with separation wall during dry periods is flow weighed average T-N 22mg/L, T-P 2.4mg/L, the combined Chenseokgyo outfall without the separation wall is average T-N 21mg/L, T-P 2.6mg/L, and the separated Pyoungsong center outfall is average T-N 12mg/L, T-P 1.0mg/L. The T-N, T-P concentration in separated outfall make form about 44%, 42% of the combined outfall, and this means the separated outfall (i.e. storm sewer) is polluted by inflow of sewage. The overflow load of the separated outfall is ten times higher than the combined outfall and its overflow load per rainfall is three times than combined outfall during the wet periods. Therefore, the control plan of overflow load is required in storm sewer. The control effects of the overflow load increased 100% by setting the separation wall in the combined sewer, and showed 44% increase without the separation wall in separated sewer, but forecasted over than 82% increase of effects with the separation wall.