DOI QR코드

DOI QR Code

Study on CFD Methodology for a Open Channel Type UV Reactor

전산유체역학을 활용한 개수로형 UV소독장비의 해석기법 연구

  • Received : 2014.10.20
  • Accepted : 2015.02.02
  • Published : 2015.04.01

Abstract

The performance of UV reactor which is used in water treatment is strongly affected by UV fluence rate and water flow in the UV reactor. Therefore, CFD tools are widely used in designing process of UV reactors. This paper describes the development of a computational fluid dynamics (CFD) methodology that can be used to calculate the performance of open channel type UV reactor used in wastewater treatment plant. All computations were performed using commercial CFD code, CFX, by considering three dimensional, steady, incompressible flow. The Eulerian-Eulerian multi-phase method were used to capture the water-air interface. The MSSS model, provided by UVCalc3D, was used to calculate the UV intensity field. The numerical predictions and calculated UV Dose were compared with experimental dataset to validate the CFD methodology. The reactor performance based on MS2 log reduction was well matched with measurements within 6%.

Keywords

References

  1. UNEP, 2012, Global Environment Outlook5 : Environment for the future we want, Progress Press Ltd, Valletta, Molta.
  2. US EPA, 2006, Ultraviolet Disinfection Guidance Manual for the Final Long Term 2 Enhanced Surface Water Treatment Rule, Washington, DC.
  3. Hwang, W., Lee, K., Kim, H., and Cho, J., 2013, "Bioassay Validation Test of Open Channel UV-Reactor," Proceeding of KSME annual fall Conference, Jeongsun.
  4. Wols, B., 2011, Computational Fluid Dynamics in Drinking Water Treatment, IWA Publishing
  5. Saha, R. K., 2013, Numerical Simulation of an Open Channel Ultraviolet Waste Water Disinfection Reactor, M.S. Thesis, The University of Western Ontario, Canada.
  6. Lyn, D. A., and Blatchely E. R., 1999, "Numerical Modeling of Flow and Disinfection in UV Disinfection Channels," Journal of Environment Engineering, Vol. 125, No. 1, pp. 17-26. https://doi.org/10.1061/(ASCE)0733-9372(1999)125:1(17)
  7. Lyn, D. A., 2004, "Steady and Unsteady Simulation of Turbulent Flow and Transport in Ultraviolet Disinfection Channels," Journal of Hydraulic Engineering, Vol. 130, No. 8, pp. 762-770. https://doi.org/10.1061/(ASCE)0733-9429(2004)130:8(762)
  8. Liu, D., 2004, Numerical Simulation of UV Disinfection Reactors: Impact of Fluence Rate Distribution and Turbulence Modeling, Ph.D. Thesis, North Carolina State University, Raleigh, NC.
  9. Bolton, J. R., 2000, "Calculation of Ultraviolet Fluence Rate Distribution in an Annular Reactor: Significance of Refraction and Reflection," Water Research, Vol. 34, pp. 3315-3324 https://doi.org/10.1016/S0043-1354(00)00087-7
  10. Wilcox, D. C., 2004, Turbulence Modeling for CFD, 2nd editions, DCW industries, California.
  11. Jacob, S. M., and Dranoff, J. S. 1970, "Light Intensity Profiles in a Perfectly Mixed Photoreactors," A.I.C.H.E.J., Vol. 16, pp. 359-363..
  12. Blatchley, E. R., 1997, "Numerical modeling of UV intensity: application to collimated-beam reactors and continuous-flow systems," Water Research, Vol. 31, pp. 2205-2218. https://doi.org/10.1016/S0043-1354(97)82238-5
  13. Wilson, B. R., Roessler, P. F., Van Dellen, E., Abbaszadegan, M., and Gerba, C. P., 1992, "Coliphage MS2 as a UV Water Disinfection Efficacy test Surrogate for Bacterial and Viral Pathogens," Proceedings of the Water Quality Technology Conference, Toronto, pp. 219-235.