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http://dx.doi.org/10.11001/jksww.2012.26.2.257

Optical characteristics of the UV intensity distribution in a non-contact type UV photoreactor  

Jeon, Hwa-Bong (조선대학교 토목공학과)
Yun, Jung-Won (조선대학교 토목공학과)
Kim, Sung-Hong (조선대학교 토목공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.26, no.2, 2012 , pp. 257-264 More about this Journal
Abstract
The concept of a non-contact type of UV disinfection system was introduced in this study. UV lamps and their quartz sleeves hang over the water surface and there is no interface between the sleeve and water. Obviously, there is no fouling. Based on optical laws and other UV distribution models, a detail mathematical model for a non-contact type UV disinfection system was developed in this study. Pathway length of UV light in a non-contact type photoreactor is longer than that in a submerged type photoreactor because the light is more refractive while passing through 3 interfaces of medium. But the pathway length passing through the water media is not significantly longer than that in a submerged type photoreactor so, the absorption of UV light by water is not significantly different from the other system. Due to the reflection effect, UV intensity is rapidly decreased as the horizontal distance from the light source is increased. The reflective attenuation in a non-contact type photoreactor is higher than that in a submerged type photoreactor. These mean that the short photoreactor is advantageous than the narrow-long photoreactor for the non-contact type photoreactor in an optical point of view.
Keywords
UV disinfection; non-contact UV lamp system; UV distribution model; UV intensity; fouling;
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  • Reference
1 김두일, 최영균, 김성홍 (2008) 자외선 강도 산정 모델과 영향인자에 관한 연구, 상하수도학회지, 22(4), pp.421-427.
2 최영균, 김두일, 김성홍 (2009) 광학모델을 이용한 자외선 접촉조 최적 설계에 관한 연구, 한국물환경학회지, 25(4), pp.547-552.
3 환경부 (2008) 2008 하수도통계, 서울, pp.670-920.
4 Bolton J.R. (2000) Calculation of ultraviolet fluence rate distributions in an annular reactor: Significance of refraction and reflection, Water Research, 34(13), pp.3315-3324.   DOI
5 Jacob S.M. and Dranoff J.S. (1970) Light intensity profiles in a perfectly mixed photoreactor, AIChE J, 16(3), pp.359-363.   DOI
6 Kim SH, Choi YG and Kim DI (2011) Development of UV Distribution Model for the Non-contact Type UV Disinfection System, International Journal of Chemical Reactor Engineering, 9, A57. pp.1-17.
7 Lin L., Johnston C.T. and Blatchley III E.R. (1999) Inorganic fouling at quartz : water interfaces in ultraviolet photoreactors - I. Chemical characterization, Water Research, 33(15), pp.3321-3329.   DOI
8 Linden K.G., Shin G. and Sobsey M.D. (2001) Comparative effectiveness of UV wavelengths for the inactivation of Cryptosporidium parvum oocysts in water, Water Science and Technology, 43(12), pp.171-174.
9 Liu D., Ducoste J., Jin S. and Linden K. (2004) Evaluation of alternative fluence rate distribution models, J Water Supply Res Technol-Aqua, 53(6), pp.391-408.
10 USEPA (2006) Ultraviolet disinfection guidance manual for the final long term 2 enhanced surface water treatment rule, Office of Water, Washington DC, USA. pp.2-27 - 2-28.