에너지공학 (Journal of Energy Engineering)

  • 제21권2호
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  • Pages.194-201
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  • 2012
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  • 1598-7981(pISSN)
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  • 2713-7074(eISSN)
한국에너지학회 (The Korean Society for Energy)
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전기분해를 이용한 하수슬러지 가용화 연구

The Study on the Solubilization of Sewage Sludge by Electrolysis Treatment

  • 김재형 (서울과학기술대학교 에너지환경대학원) ;
  • 전혜연 (서울과학기술대학교 에너지환경대학원) ;
  • 이준철 (서울과학기술대학교 에너지환경대학원) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원)
  • Kim, Jae Hyung (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Jeon, Hye Yeon (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Lee, Jun Cheol (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Pak, Dae Won (Graduate School of energy and Environment, Seoul National University of Technology & Science)
  • 투고 : 2012.01.19
  • 심사 : 2012.06.05
  • 발행 : 2012.06.30
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초록

본 연구에서는 소화가스 효율 향상을 위한 전처리로 전기분해를 이용한 하수슬러지 가용화 연구를 수행하였다. 전기분해 처리시간과 전류밀도가 증가함에 따라 SCOD 농도가 증가하였고, 처리시간 60분에 SCOD, TN, TP가 각각 7.4배, 1.9배, 1.3배로 가장 높은 증가율을 보였다. 하수슬러지 초기 pH별 전기분해 처리효과는 강산성, 강알칼리성에서 가용화율이 높았고, 특히 pH 12에서 32.9%의 높은 가용화율을 보였다. 이상의 결과는 전기분해에 의한 직 간접산화작용으로 인해 슬러지의 플록, EPS 구조가 파괴되어 미생물이 이용가능한 유기물들이 증가되었음을 의미한다.

In this research, a sewage sludge solubilization study using electrolysis was performed as a pre-treatment for anaerobic digestion efficiency improvement. SCOD potency increased as the treatment time and electric current density increased with sludge electrolysis treatment while SCOD, TN, and TP especially showed the highest increase of 7.4 times, 1.9 times, and 1.3 times respectively at the 60 minute point of treatment. Solubilization was high at the strong acidic and alkaline status for the sewage sludge electrolysis treatment results along early stage pH, and especially, a high solubilization percentage of 32.9% was seen at pH 12. The above result shows that there was an increase of organic matter able to be used by microorganisms from sludge floc and the destruction of EPS structure due to direct and indirect oxidation following electrolysis.

키워드

과제정보

연구 과제 주관 기관 : 환경부

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