Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Study on performance improved design of pressure-type ozone contactor in multistorey water treatment plant by CFD

CFD에 의한 수직형 정수처리 실증시설 내 압력식 오존접촉조 성능개선에 관한 연구

  • 최종웅 (한국수자원공사 상하수도연구소) ;
  • 김성수 (한국수자원공사 상하수도연구소) ;
  • 김정현 (한국수자원공사 상하수도연구소) ;
  • 김관엽 (포스코건설 R&D Cneter)
  • Received : 2014.05.09
  • Accepted : 2014.08.07
  • Published : 2014.08.15
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Abstract

The ozonation process has been widely used for drinking water disinfection around the world. Recently, the pressurized ozone contactor, in which the side stream typed ozone injection method is installed, has been applied to water treatment system. In this study, numerical calculations were conducted to compare prototype and screw-type ozone contactors based on hydraulic effectiveness in more details. The prototype ozone contactor was already installed and operated in domestic water treatment plant, and the screw-type is the suggested one for improving ozone contact efficiency installing the screw plate to the prototype. Screw turn numbers of screw plate were changed as 3, 5, 7 and 9, respectively for numerical simulation. The CT(concentration of disinfectant in mg/L times time in minutes) value was considered as one of the options for evaluating disinfection ability. From the results, it could be concluded that the performance of the screw-type is higher than that of the protype contactor by controlling the variable T as the tracer time. Also, Morill index of the screw-type(turn numbers = 5 ) appeared to be lower than the other.

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