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Inactivation Effect of Cryptosporidium by Ozone and UV  

Kim, Yun-Hee (Department of Environmental Engineering, Yeungnam University)
Lee, Chul-Hee (Department of Environmental Engineering, Yeungnam University)
Lee, Shun-Hwa (Department of Environmental Engineering, Yeungnam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.1, 2007 , pp. 31-39 More about this Journal
Abstract
The objective of this study was to investigate the inactivation characteristics of Cryptosporidium oocysts by ozone and UV and to suggest the better, disinfection method. The inactivation CT value of 1 log(90%) and 2 log(99%) in of one disinfection, which is an index of disinfection for inactivation effect by ozone, were respectively 5.77 $mg{\cdot}min/L$ and 21.30 $mg{\cdot}min/L$. The inactivation in UV disinfection was not affected by pHs(5, 7 and 9), low turbidity(5 and below NTU) and UV intensity(0.2 and 0.6 $mWs/cm^2$) but obviously decreased at high turbidity over 20 NTU. Therefore UV disinfection capacity can be obtained when a good turbidity removal in drinking water treatment process is achieved. And if oocysts is exposed by high UV over 0.6 mWs/cm2 during enough time, the better inactivation effect will be obtained.
Keywords
Cryptosporidium; Ozone; UV; Disifection; Inactivation; pH; Turbidity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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