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Micro-Bubble Generating Properties on Gas/Liquid Flow Rate Ratio with the Sludge Flotation/Thickening Apparatus

슬러지 부상농축장치의 기·액 유량비에 따른 미세기포 발생 특성

  • Lee, Chang-Han (Department of Environmental Administration, Catholic University of Pusan) ;
  • Park, Jong-Won (ILSOM Co., Ltd. R&D CENTER) ;
  • Ahn, Kab-Hwan (Department of Environmental Administration, Catholic University of Pusan)
  • 이창한 (부산가톨릭대학교 환경행정학과) ;
  • 박종원 (일솜주식회사) ;
  • 안갑환 (부산가톨릭대학교 환경행정학과)
  • Received : 2013.07.18
  • Accepted : 2013.09.10
  • Published : 2014.01.31

Abstract

The sludge flotation/thickening apparatus equipped a micro-bubble generating pump was used to investigate micro-bubble generating properties on operational parameters. We evaluated micro-bubble generating properties as results to be operated the apparatus by operational parameters which are pump discharge pressure, air/water ratio(A/W ratio), air flow rate, and water flow rate. Micro-bubble generating efficiencies in pumps without recycling flow and with 50% of recycling flow was found to be very efficient on optimum A/W ratio from 1.06 to 3.62% and optimum A/W ratio from 1.05 to 4.06%, respectively. In condition of 3.6% of A/W ratio, we showed that the apparatus could be generated 36,000 ppm of micro-bubble concentration to be optimum treatment efficiency in sludge thickening process.

Keywords

Microbubble;Pump;DAF;Sludge;Thickening

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