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Study on solubilization of sewage sludge using electrolysis techniques

전기분해에 의한 하수슬러지 가용 효과 연구

  • Lee, Ji-Sun (Dept. of Semiconductor & Display Engineering, Graduate School of BK21, Hoseo University) ;
  • Chang, In-Soung (Dept. of Environmental Engineering, Hoseo University) ;
  • Lee, Chul-Ku (KumKang Environmental Engineering Co.) ;
  • Joung, Seun-Young (KumKang Environmental Engineering Co.)
  • 이지선 (호서대학교 대학원 BK21 반도체디스플레이공학과) ;
  • 장인성 (호서대학교 환경공학과) ;
  • 이철구 (금강엔지니어링(주)) ;
  • 정선용 (금강엔지니어링(주))
  • Received : 2010.12.06
  • Accepted : 2011.02.10
  • Published : 2011.02.28

Abstract

Although sludge production has been increased due to the number of the wastewater treatment plants expanded, needs of the techniques for the sludge reduction and disposal has been issued importantly because the sludge dumping to ocean is prohibited from 2012 by the London Dumping Convention. Therefore, the sludge solubilization using electrolysis as an alternative techniques for the sludge disposal was carried out in this study. Iridium coated titanium based insoluble electrodes were used and 20 volt was applied to the electrolysis reactor using DC power supply. Supernatants of the treated sludge was monitored: The soluble COD, TN, TP of it was increased to 151%, 22% and 6% respectively. And the sludge floc size distribution was changed, that is, the flocs ranged from 0.1 to 1.0 ${\mu}m$ were increased. All of these results indicate that the cells were lysed and the internal matters bursted out of the cell after electrolysis. As well as the reduction of the sludge production, the soluble organic matters from the cells could be used as an external carbon sources in the advanced wastewater treatment plants.

Keywords

Sewage sludge;Solubilization;Electrolysis

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