Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Pattern Analysis of CSOs Generation in a Small Rural City and Control Schemes

농촌 소도시의 CSOs 발생패턴분석 및 관리대책에 관한 연구

  • Kim, Youngchul (Department of Environmental Engineering, Hanseo University) ;
  • An, Ik-Sung (Environmental Studies Institute, Hanseo University) ;
  • Lee, Myung-Jae (DODAM Engineering and Construction Co., LTD.)
  • Received : 2007.04.12
  • Accepted : 2007.07.05
  • Published : 2007.07.30
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Abstract

In this study, combined sewer overflows (CSOs) from five independent rainfall events in rural city area were collected and investigated. First flush effect in sewage pumping station located near the WWTP was retarded 30 to 60 minutes from booster pumping station. The ratios between SS, COD and TP concentrations prior to rainfall and peak concentrations during the period of rainfall were highly increased but nitrogen was relatively constant, which indicates that it is not associated with particles washed off from the surface of watershed. Mass balance results show that 30% of CSO was generated from booster pump station and 66.5% of CSO was from the whole runoff area. In the area of newly constructed sewer system, CSO problem was related with pump and sewer capacities, but in other old sewer system equipped area, it was due to the collection efficiency. Finally, Log-Log pollutant rating equations were suggested.

Keywords

Acknowledgement

Supported by : 수자원의 지속적 확보기술개발사업단

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