Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on the Organic Waterwater Treatment Using of Agitating Mixer Biofilm Reactor

Agitating mixer를 이용한 생물막공법에서 유기성 폐수처리에 관한 연구

  • 이상수 (한리산업개발(주)환경연구소) ;
  • 김성순 (중앙대학교 토목공학과) ;
  • 탁성제 (세경대학 토목환경시스템과) ;
  • 정근진 (중앙대학교 토목공학과)
  • Published : 1999.06.15
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Abstract

The general objectives of this study are to develop a new biofilm reactor equipped with agitating mixer and to evaluated the treatment efficiency of the reactor. The experimental tests were conducted to estimate the oxygen transfer rate of agitating mixer system. Results are as follows. 1. The oxygen transfer coefficient, KLa, was $8.94hr{-1}$ and $7.50hr{-1}$ at 500rpm and 250rpm of agitating mixer speed, respectively. When the agitating mixer was used in the biofilm reactor, 22.5% and 18.8% of oxygen transfer rates were increased at 500rpm and 250rpm, respectively. 2. The removal rate of BOD and CODcr was decreased by 5.0% when the agitating mixer speed was varied from low (250rpm) to high level (500rpm). 3. The concentration of attached biomass had a difference of 5.0% to 7.3%, whereas that of suspended biomass had a difference of about 15.0%, depending upon variation of the agitating mixer speed.

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