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


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.


Sewage sludge;Solubilization;Electrolysis


  1. 환경부, 하수도 통계, 2008.
  2. 이채영 외, "하수슬러지의 초음파 전처리를 통한 가용화 및 혐기성 생분해도 향상", 유기성자원학회 논문지, 제16권, 제3호, pp. 83-90, 2008.
  3. A.G. Vlyssides et al, "Thermal-alkaline solubilization of waste activated sludge as a pre-treatment stage for anaerobic digestion", Bioresource Technology, 91, pp.201-206, 2004
  4. 이창근 외, "오존을 이용한 하수슬러지의 감량화와 안정화", 한국물환경학회 논문지, 제20권, 제3호, pp. 290-295, 2004.
  5. Li-Bing Chu et al, "Enhanced sludge solubilization by microbubble ozonation", Chemosphere, 72, pp. 205-212, 2008.
  6. 양현상 외, "유산균 접종에 의한 하수 슬러지의 가용화", 한국미생물.생명공학회 논문지, 제36권, 제3호, pp. 233-239, 2008.
  7. Peng Liang et al, "Excess sludge reduction in activated sludge process though predation of Aeolosoma hemprichi", Biochemical Engineering Journal, 28, pp. 117-122, 2006.
  8. APHA, AWWA, WEF. Standard Method for the Examination of Water and Wastewater, 19th edition, USA (1995)
  9. 황웅공, "전기분해에 의한 하수 슬러지 감량화와 고도처리 특성 연구", 서울시립대학교 도시과학대학원 환경공학과 석사학위논문, 2005.
  10. 이병헌 외, "전기분해를 이용한 하수 슬러지 감량", 한국물환경학회 논문지, 제22권, 제2호, pp. 264-270, 2006.
  11. 이창근 외, "오존을 이용한 하수슬러지의 감량화와 안정화", 한국물환경학회 논문지, 제20권, 제3호, pp. 290-295, 2004.