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임봉수(Bong-Su Lim),이광춘(Kuang-Chun Lee),최봉절(Bong-Choel Choi),양연호(Yeon-Hoo Yang),김경수(Kyeong-Su Kim) 대전대학교 환경문제연구소 2005 환경문제연구소 논문집 Vol.9 No.-
This research is to determine the stormwater effects on sewer concentrations by measuring and comparing the flow and pollutant concentrations during dry and rainy periods in the existing BOX type combined sewer pipes. The monitoring was carried out in two sites, which were the Daesachen outfall having PE separation wall in BOX type combined sewer pipes and the Yongunchen outfall not having seperatioin wall. According to the research, the separation wall controls 52% pollutant mass during a storm period(11.5 mm/hr rainfall intensity). Therefore, The seperation wall controlled about 53% nutrient pollutant mass loading a storm period(11.5mm/hr rainfall intensity) in Dasachan outfall. If the seperation wall is installed in Yongunchen, nutrient pollutant mass loading controls 61% of TN, 62% TP respectively. Overflowing pollutant mass loading is 16 fold as BOD, 18 fold as TN and 13 fold as TP higher in Youngunchen outfall than in Daesachen outfall.
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.
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.