Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지

Advanced Wastewater Treatment using Sludge Solubilization by the Cavitation and PGA addition

Cavitation에 의한 슬러지 가용화와 PGA를 이용한 하수고도처리에 관한 연구

  • 김동하 (국민대학교 건설시스템공학부)
  • Received : 2008.06.04
  • Accepted : 2008.08.08
  • Published : 2008.08.15
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Abstract

Some pretreatment methods have been proposed to enhance the biodegradability and to shorten the hydrolysis reaction time. By means of efficient pretreatment the suspended solids (SS) can be made of better accessible for the anaerobic bacteria. There are several ways how this can be accomplished, which include biological, mechanical, thermal, and chemical methods. For the sludge solubilization using the cavitation phenomenon, we have tried to develop a pretreatment process consisted of a reactor and pumps. The objectives of this study were to develop a advanced wastewater treatment consisted of IABR and the cavitation with PGA. The most effective removal for organic matter and nutrients were occured when both cavitation pretreatment and ${\gamma}$-PGA were applied at the IABR process. Only small portion of ${\gamma}$-PGA at a rate of 1.38mg/L, was enough to improve sedimentation ability, SS removal efficiencies, and sludge volume reduction. After the sludge solubilization by the cavitation, SCOD increased to 193% and SS decreased to 36%. The removal ratio of BOD was 94.5%, T-N removal ratio was 85.5% and T-P removal ratio was 84.9%. The combination process of the IABR with the cavitation and PGA addition seems to be very effective alternative wastewater treatment process.

Keywords

Acknowledgement

Grant : 유체회전에 의한 유기성 고형물의 가용화 장치개발과 병합처리에 의 한 자원화 가능성 연구

Supported by : 환경기술진흥원

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