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Generation and Current Treatment Status of Sewage at the Rural Village in Chungnam Province

충남지역 마을하수의 발생 및 처리현황

  • Kang, Bang-Hun (Division of Rural Environment & Amenity, Rural Resources Development Institute, National Institute of Agricultural Science & Technology) ;
  • Kim, Jin-Ho (Division of Environment & Ecology, National Institute of Agricultural Science & Technology, RDA) ;
  • Choi, Chul-Mann (Division of Environment & Ecology, National Institute of Agricultural Science & Technology, RDA)
  • 강방훈 (농업과학기술원 농촌자원개발연구소 농촌환경자원과) ;
  • 김진호 (농업과학기술원 농업환경부 환경생태과) ;
  • 최철만 (농업과학기술원 농업환경부 환경생태과)
  • Published : 2008.03.31

Abstract

The purpose of this study is to investigate the current status, including the maintenance problems and removal efficiency, of small sewage treatment facilities in Chung-nam province(Asan, Buyeo, and Gongju city). Our results showed that inflow water quality of Asan city was 19.1 mg/L of BOD, 29.0 mg/L of COD, 13.4 mg/L of T-N and 1.5 mg/L of T-P, respectively, which was much higher than any other site. Among the factors known to be an important index of water quality, the SS and BOD removal efficiency was about 70% and 50% respectively. However, the nitrogen removal efficiency was less than 10%. The total removal efficiency of pollutant was 71.1% of SS, 52.6% of BOD, 46.2% of COD, 9.2% of T-P and 4.6% of T-N respectively. Therefore nitrogen removal processes are required to prevent serious eutrophication of small river. Removal efficiency for BOD and SS of high-efficient sewage treatment facilities (STFs) and contact oxidation process was much higher than another process. Performance of these sewage treatment facilities(STFs) is not optimal due to ineffective planning for the inflow water quality. To improve these facilities, it is proposed that a technical expert analysis of water quality at these facilities is periodically required.

Keywords

sewage treatment facilities;rural area;water quality

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