Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Analysis of RCSTP And MWTP Pollutants Treatment Efficiency in Bong-Hwa Gun

봉화군 마을하수도 및 하수처리장의 오염물질 처리 효율 분석

  • Park, Minsoo (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Im, Jiyeol (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Gil, Kyungik (Department of Civil Engineering, Seoul National University of Science and Technology)
  • 박민수 (서울과학기술대학교 건설시스템공학과) ;
  • 임지열 (고려대학교 건축사회환경공학과) ;
  • 길경익 (서울과학기술대학교 건설시스템공학과)
  • Received : 2015.11.18
  • Accepted : 2017.02.02
  • Published : 2017.02.28
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Abstract

Protected area of water for supply source is located mostly of rural area in Korea. Normally, sewage treatment system is poor to manage in rural, because low population and density. Rural area need sewage treatment system to supervise supply source of water. In this study, analysis on operation result of 4 RCSTP and MWTP is located at the rural area. Higher concentration of pollutant were inflows to MWTP than RCSTP, and effluent quality standard is satisfaction. However, RCSTP effluent pollutant concentrations was researched higher than MWTP. The organic matter(BOD, COD) were about 5% of a high treatment efficiency to a median. The nutrient(T-N, T-P) were detected Up to high 30%. Also, we analyzed to effect reactor operational parameters on the pollutant treatment efficiency like mixed liquer suspended solid(MLSS), dissolved oxygen(DO) and sludge retention time(SRT). As a result, pollutant treatment efficiency showed fluctuation in accordance with operating condition. Thus, it is necessary to manage the reactor operation condition for management of rural area sewage treatment.

국내의 상수원으로 사용하는 수질보호구역은 주로 농촌지역인 경우가 많다. 농촌지역의 경우 인구수 및 인구밀도가 높지 않아 하수도 시스템 보급이 열악하여 상수원 관리를 위해서는 농촌지역의 하수처리에 관리가 필요하다. 본 연구에서는 농촌지역에 위치한 마을하수도 4개소와 하수처리장의 운전결과를 분석하였다. 마을하수도보다 하수처리장에서 고농도의 오염물질이 유입되었으며, 방류수 수질 기준은 모두 만족하는 것으로 나타났다. 하지만 마을하수도의 방류수의 오염물질 농도가 하수처리장보다 더 높은 것으로 조사되었다. 처리 효율에서는 median 값으로 유기물(BOD, COD)의 경우 약 5%정도, 영양염류(T-N, T-P)의 경우 최대 30%정도 높게 검출되었다. 또한 오염물질 처리효율에 MLSS, DO 및 체류시간과 같은 생물반응조 운전 인자가 미치는 영향에 대해 분석하였다. 그 결과 운전 조건에 따라 오염물질 처리효율이 변하는 것으로 나타났다. 따라서 농촌지역에서 하수 관리를 위해서는 생물 반응조 운전 조건 등의 유지관리에 주의를 기울여야 한다.

Keywords

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