대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제38권12호
  • /
  • Pages.676-682
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  • 2016
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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빗물-저농도 오수 하이브리드 시스템의 설계 및 운전 평가 : 서울대 39동

Design and Operation of the Rainwater-Greywater Hybrid System : SNU No. 39 Building

  • 심인태 (서울대학교 건설환경공학과) ;
  • 박현주 (서울대학교 건설환경종합연구소) ;
  • 김충일 (서울대학교 건설환경종합연구소) ;
  • 정성운 ((사)빗물모아 지구사랑) ;
  • 한무영 (서울대학교 건설환경공학과) ;
  • 남궁은 (명지대학교 환경에너지공학과)
  • Shim, In-tae (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Park, Hyun-ju (Integrated Research Institute of Construction and Environmental Engineering, Seoul National University) ;
  • Kim, Tschung-il (Integrated Research Institute of Construction and Environmental Engineering, Seoul National University) ;
  • Jung, Sung-un (Incorporated Association, Rainwater for All) ;
  • Han, Moo-young (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Namkung, Eun (Department of Environmental Engineering and Energy, Myongji University)
  • 투고 : 2016.11.25
  • 심사 : 2016.12.28
  • 발행 : 2016.12.31
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초록

본 연구에서는 빗물과 중수를 연계하여 각각의 단점을 극복하고 장점을 극대화 할 수 있는 빗물-저농도 오수 하이브리드 시스템을 설계하고 서울대학교에 설치하여 수량 및 수질 모니터링과 경제성을 평가하였다. 건물에서 발생하는 오수 중세면, 샤워용수를 중수로 선택하여 침지형 분리막과 오존산화 처리하였으며, 건물 옥상에서 집수된 빗물은 저류 후 처리수조로 이송되어 처리된 저농도 오수와 혼합되어 변기 세척용수로 공급하였다. 변기 세척용수 $3,979m^3$ 중 65%인 $2,599m^3$를 빗물 이용과 저농도 오수를 재이용하였다. 빗물은 총대장균을 제외한 나머지 항목에서 중수도 수질 기준을 만족하였으며, 저농도 오수는 탁도, SS, BOD, 총대장균이 기준치를 초과하여 침지형 분리막과 오존산화 처리하여 안정적인 수질을 유지하였다. 경제성 분석 결과, 빗물-저농도 오수 하이브리드 시스템은 B/C (Benefit-Cost Ratio) 비율이 1.11으로 사업의 타당성이 있다고 판단된다. 물 재이용시설의 이용확대를 위해 시설 운영에 따른 경제성을 높이기 위한 다양한 연구 및 정책적 지원이 필요하다.

In this study, rainwater-greywater hybrid system was installed and operated for 1 year in order to evaluate its water quantity, water quality, and economic efficiency in building no. 39. This system was expected to overcome each disadvantages of and maximize each advantages. Low-greywater that was washed up from shower room was treated by MBR (Membrane Bioreactor) and ozone oxidation. Rainwater that was collected from the rooftop was stored in a reservoir, and then transferred to the storage tank that was mixed with treated greywater. After 1 year operating in building no. 39, rainwater and greywater was used to supply $2,599m^3$ of toilet flushing water. In terms of water quality, rainwater was satisfied far the greywater reuse standards except for E.coli. Moreover, low greywater quality was acceptable except for E. coli, BOD, SS, and turbidity. In addition, economic analysis was obtained from benefit-cost ratio (B/C) with 1.11. It implies that the feasibility of the project was reasonable. Furthermore, various research and policy to improve the economic efficiency of water recycling facilities is required to expand the use of water recycling facilities.

키워드

참고문헌

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피인용 문헌

  1. Expansion of Water Reuse Facility for Building Unit to Solve Water Shortage Problem vol.39, pp.7, 2017, https://doi.org/10.4491/KSEE.2017.39.7.377