Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Evaluating Effective Volume and Hydrodynamic Behavior in a Full-Scale Ozone Contactor with CFD Simulation

전산유체역학을 이용한 실규모 오존 접촉에서의 수리거동과 유효 체적 평가에 관한 연구

  • 박노석 (한국수자원공사 수자원연구원) ;
  • ;
  • ;
  • 배철호 (한국수자원공사 수자원연구원) ;
  • 이선주 (한국수자원공사 수자원연구원)
  • Received : 2004.08.06
  • Accepted : 2004.10.01
  • Published : 2004.10.15
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Abstract

An Ozone reaction model combined with CFD(Computational Fluid Dynamics) technique was developed in this research, in the simulation of ozonation, hydrodynamic behavior as well as reaction model is important because ozone is supplied to treated water as gas ozone. In order to evaluate hydrodynamic behavior in an ozone contactor, CFD technique was applied. CFD technique elucidated hydrodynamic behavior in the selected ozone contactor, which consisted of three main chambers. Three back-mixing zones were found in the contactor. The higher velocities of water were observed in the second and third compartments than that in the first compartment. The flow of the opposite direction to the main flow was observed near the water surface. Based on the results of CFD simulation, the ozone contactor was divided into small compartments. Mass balance equations were established were established in each compartment with reaction terms. This reaction model was intended to predict dissolved ozone concentration, especially. We concluded that the model could predict favorably the mass balance of ozone, namely absorption efficiency of gaseous ozone, dissolved ozone concentration and ozone consumption. After establishing the model, we discussed the effect of concentration of gaseous ozone at inlet, temperature and organic compounds on dissolved ozone concentration.

Keywords

References

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