Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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A Study on Environmental and Economic Analysis for Each Treatment of Sewage Sludge(I) - Results of Precision Monitoring -

하수슬러지 처리방법별 환경성 및 경제성 분석에 대한 연구(I) - 정밀모니터링 분석 중심으로 -

  • Lee, Dongjin (National Institute of Environmental Research, Environmental Resource Research Department) ;
  • Lee, Suyoung (National Institute of Environmental Research, Environmental Resource Research Department) ;
  • Kwon, Younghyun (National Institute of Environmental Research, Environmental Resource Research Department) ;
  • Bae, Jisu (National Institute of Environmental Research, Environmental Resource Research Department) ;
  • Cho, Yuna (National Institute of Environmental Research, Environmental Resource Research Department)
  • 이동진 (국립환경과학원 환경자원연구부) ;
  • 이수영 (국립환경과학원 환경자원연구부) ;
  • 권영현 (국립환경과학원 환경자원연구부) ;
  • 배지수 (국립환경과학원 환경자원연구부) ;
  • 조윤아 (국립환경과학원 환경자원연구부)
  • Received : 2016.05.10
  • Accepted : 2016.06.13
  • Published : 2016.06.30
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Abstract

This study investigated the environmental and economical assessment for sewage sludge treatment options including biogasification, incineration, carbonization, drying, and solidification. Additionally it is also investigated the economical feasibility of the current guidelines (Digestion efficiency for organic waste = 45 %, Moisture content of sludge = 95 and 93 %) and it aimed to suggest the scientific informations for a policy-making. For the economical feasibility the 30 plants with anaerobic digestion treatment and the 17 plants without anaerobic digestion treatment were investigated. The result of the comparison of sewage sludge treatment options showed that anaerobic digestion+incineration was the most economically feasible considering incineration and drying. For smaller treatment capacity, solidification was the most economically feasible considering carbonization and solidification and anaerobic digestion+carbonization was the most economically feasible considering carbonization and solidification.

본 연구는 바이오가스화 처리 유 무에 따라 하수슬러지 처리방법별, 즉 소각, 탄화, 건조, 고형화 등에 대한 환경성 및 경제성 분석을 실시하였다. 추가적으로 혐기 소화효율 45 %, 함수율 95% 등 정부정책 가이드 라인에 때한 경제적 타당성 조사도 실시하여 정책수립의 과학적 근거자료로 제시하고자 하였다. 경제성 분석을 위하여 30개의 혐기소화 소유 시설과 17개 소유하지 않는 시설을 조사하였다. 결과적으로, 환경성 및 경제성을 고려할 때 혐기소화 이후 후처리로 소각 또는 건조하는 경우가 가장 타당한 것으로 분석되었으며, 후처리로 탄화처리하는 경우가 가장 타당성이 적은 것으로 분석되었다. 고형화 처리는 가장 경제적이었으나 환경적 및 운전성이 부족하여 타당성이 부족한 것으로 분석되었다.

Keywords

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