Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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The Reduction of Waterworks Sludge by Hydrogen Peroxide Treatment

과산화수소 산화처리에 의한 정수슬러지의 감량화

  • 권재현 (인제대학교 환경공학부) ;
  • 김영도 (인제대학교 환경공학부) ;
  • 박기영 (건국대학교 사회환경시스템공학과) ;
  • 이석헌 (한국과학기술연구원 환경공정연구부) ;
  • 김일규 (부경대학교 환경공학과)
  • Received : 2006.12.19
  • Accepted : 2007.02.05
  • Published : 2007.02.15
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Abstract

The effects of hydrogen peroxide treatment on the reduction of waterworks sludge were investigated in this study. Sludge treated by peroxidation $H_2O_2$ oxidation) was dewatered using a pressure filter at 3atm. It was observed that $H_2O_2$ treatment at the acidic condition significantly reduce both cake water content and specific resistance to filtration (SRF), indicating the enhancement of dewaterability and filterability. The filterability by hydrogen peroxide treatment at pH 3.5 was better than acidic treatment and became comparable with polymer conditioning. The sludge filterability evaluated by SRF was optimal at a dose 2ml $H_2O_2$/sludge($0.02g\;H_2O_2/gTS$) after adjusting of pH to 3.5. The $H_2O_2$ oxidation at pH 3.5 also produced even more dewatered cake when compared with polymer conditioning. The reduction rate of sludge mass at an optimal condition showed 34% compared with untreated sludge. The effects of peroxidation on sludge properties including zeta potential, bound water and particle size were also evaluated. Peroxidation at the acidic condition reduced both bound water and zeta potential. By $H_2O_2$ combined with sulfuric acid leached iron caused Fenton's reaction, which showed a potential to significantly reduce the amount of solids mass and to produce more compact cake with higher filterability.

Keywords

Acknowledgement

Supported by : 인제대학교

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