DOI QR코드

DOI QR Code

CFD에 의한 수직형 정수처리 실증시설 내 압력식 오존접촉조 성능개선에 관한 연구

Study on performance improved design of pressure-type ozone contactor in multistorey water treatment plant by CFD

  • 최종웅 (한국수자원공사 상하수도연구소) ;
  • 김성수 (한국수자원공사 상하수도연구소) ;
  • 김정현 (한국수자원공사 상하수도연구소) ;
  • 김관엽 (포스코건설 R&D Cneter)
  • 투고 : 2014.05.09
  • 심사 : 2014.08.07
  • 발행 : 2014.08.15

초록

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.

키워드

참고문헌

  1. ANSYS , (2009), "ANSYS CFX 12 Mannual", United King-Dom
  2. Pauline T., Laure M., Samuel T., Eric C. and Beno H. (2012) "Ozone inactivation of resistant microorganisms: Laboratory analysis and evaluation of the efficiency of plants" Water Research vol.46, pp.5893-5903. https://doi.org/10.1016/j.watres.2012.07.052
  3. Robert M., Mano S., Eugene W. and Jimmy C. (2002) "Development of a Ct equation for the inactivation of Cryptosporidium oocysts with ozone", Water Research vol.36, pp.3141-.3149 https://doi.org/10.1016/S0043-1354(02)00006-4
  4. Robert M., Mano S., Eugene W. and Jimmy C. (2003) "Development of a Ct equation for the inactivation of Cryptosporidium oocysts with chlorine dioxide", Water Research vol.37, pp.2773-.2783 https://doi.org/10.1016/S0043-1354(03)00062-9
  5. Slawomir W., William D.and Leo C. (1999) "Variabilty of ozone reaction kinetics in batch and continuous flow reactors", Water Research Vol.33, No.9, pp.2130-2138. https://doi.org/10.1016/S0043-1354(98)00425-4
  6. Talvy S., Debaste F., Martinelli L., Chauveheid E. and Haut B. (2011) "Development of a tool, using CFD, for the assessment of the disinfection process by ozonation in industrial scale drinking water treatment plants", Chemical Engineering Science vol.66, pp.3185-3194. https://doi.org/10.1016/j.ces.2011.02.039
  7. USEPA. (1999) "Disinfection profiling and benchmarking guidance manual", EPA 815-R-99-013.
  8. vander Walt, J. J. (2002). The modelling of water treatment process tanks. PhD thesis, Rand Afrikaans University.
  9. Wools, B. A. (2012) "Computational Fluid Dynamics in Drinking-Water Treatment", Delft University of Technology, KWR Watercycle Research Institute Series.