Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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High Rate Dissolved Air Flotation (DAF) for the Removal of Algae Species

유입원수 조류제거를 위한 high rate DAF 최적화 연구

  • Jung, Woosik (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • An, Ju-Suk (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Song, Keun-Won (Environmental Plant & Energy Division, Samjin Precision Co., Ltd.) ;
  • Oh, Hyun-Je (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT))
  • 정우식 (한국건설기술연구원 환경플랜트연구소) ;
  • 안주석 (한국건설기술연구원 환경플랜트연구소) ;
  • 송근원 ((주)삼진정밀) ;
  • 오현제 (한국건설기술연구원 환경플랜트연구소)
  • Received : 2017.07.31
  • Accepted : 2017.10.11
  • Published : 2017.10.31
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Abstract

In recent years there have been large increases in the hydraulic loading rates used to design dissolved air flotation (DAF) facilities for drinking water applications. High rate DAF processes are now available at loading rates of 20 to $40m^3/m^2{\cdot}h$. This research evaluated dissolved air flotation as a separation method for algae and organic compounds from water treatment plants. During the service period of 2016. 5. to 2017. 6., DAF pilot plants ($500m^3/day$) process has shown a constantly sound performance for the treatment of raw water, yielding a significantly low level of turbidity (DAF treated water, 0.21~1.56 NTU). As a result of analyzing the algae cell counts in the influent source, it was expressed at 100-120 cells/mL. In DAF treated water, the removal efficient of alge cell counts was found to be upto 90%. The stable turbidity and algae removal were confirmed by operating the high rate DAF process under the condition of the surface loading rate of $30m^3/m^2{\cdot}hr$.

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References

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