Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Introduction of the Basin Sewerage Plan in Japan through Case Studies of the Lake Biwa Sewerage System

비와호 유역하수도 사례분석을 통한 일본 유역하수도계획의 소개

  • 한미덕 (국립환경과학원 물환경연구부) ;
  • 박배경 (국립환경과학원 물환경연구부) ;
  • 박지형 (국립환경과학원 물환경연구부) ;
  • 김용석 (국립환경과학원 물환경연구부) ;
  • 류덕희 (국립환경과학원 물환경연구부)
  • Received : 2015.09.03
  • Accepted : 2015.09.28
  • Published : 2015.09.30
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Abstract

We investigate the Japan's Master Plan of Comprehensive Sewerage System (JMPS) and Lake Biwa basin sewerage and suggest future development direction of the Watershed Sewerage System Maintenance Plan in Korea enforced on February 2, 2013. The JMPS is designed for compliance with the environmental standard for water quality under the Environmental Policy Act. The effluent standards applied in the master plan of Lake Biwa's Sewerage Plan for the Lake Biwa is tougher than the national standards. Therefore the Lake Biwa Baisn Sewerage System was the first in Japan to adopt facilities that perform advanced treatment for nitrogen and phosphorus removal. BOD, SS, T-N and T-P concentrations of discharge water of sewage are 0.9, 0.6, 5.5, 0.06 mg/L, respectively. Especially removal efficiency for BOD is 99.5 percent. It is necessary to study the diversification of the evaluation criteria, cost minimization approach, subsidy system improvement, economic concept of discharge load adjustment system and establishment of basin sewerage concept for the development of the basin sewerage plan in Korea.

일본의 "유역별 하수도정비종합계획"(이하 '유총계획') 및 비와호 유역하수도를 소개하고 이를 바탕으로 국내에서 2013년도부터 수립 시행되고 있는 "유역하수도정비계획"의 발전방향 등을 제시하였다. 일본의 유총계획은 환경기본법에서 정하는 수질환경기준을 준수하기 위한 계획으로 비와호의 경우는 지자체의 조례에 의한 가중 배수기준보다 더 엄격한 기준을 적용하여 수립 시행하고 있는 것으로 분석되었다. 특히 비와호의 경우는 응집제첨가다단소화탈질법 등의 고도처리공법을 건설초기단계부터 적용하여 방류수의 수질항목별 농도가 BOD 0.9 mg/L, SS 0.6 mg/L, T-N 5.5 mg/L, T-P 0.06 mg/L였으며 BOD의 처리효율은 99.5%로 매우 높았다. 도입초기단계인 국내 유역하수도계획의 발전을 위해서는 평가항목의 다양화, 비용최소화, 건설 및 유지 보조금제도 개선, 경제적 개념의 배출부하량조정시스템의 도입, 유역하수도 개념 적립 등의 적용 방법 등을 장기적인 관점에서 연구할 필요가 있다.

Keywords

References

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