Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Volume Reduction of Waste Water Sludge using Electrolysis

전기분해를 이용한 하수 슬러지 감량

  • Lee, Byungheon (Department of Environmental System Engineering, Pukyong National University) ;
  • Bang, Myunghwan (Department of Environmental System Engineering, Pukyong National University) ;
  • Kim, Geonha (Department of Civil and Environmental Engineering, Hannam University)
  • 이병헌 (부경대학교 환경시스템공학과) ;
  • 방명환 (부경대학교 환경시스템공학과) ;
  • 김건하 (한남대학교 토목환경공학과)
  • Received : 2005.10.12
  • Accepted : 2006.01.03
  • Published : 2006.03.30
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Abstract

In this research, volume reduction of activated sludge using electrolysis was studied to find an optimum condition using lab scale experiments. Wasted sludge was treated by electrolysis with controlling current density, chloride concentration, electrode distance, and reaction time. Volume of return sludge was reduced by 9.79% in average while maximum was 16.7%. Sludge volume reduction efficiency was affected by current density and reaction time. It was reversely proportional to the electrode distance. Especially current density was effective on the system performance significantly. Electric conductivity, salinity and COD were increased by electrolysis implying sludge disintegrated and converted to COD in part. An empirical equation for total solid removal efficiency by electrolysis was proposed by multiple linear regression analysis as: $TS_{rem}$(%) = 5.534 ${\times}$ current density (A/l) + 0.178 ${\times}$ reaction time (m) + 2.758.

Keywords

Acknowledgement

Supported by : 환경부

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