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A Study on the Ozone Consumption Rate for Drinking Water Treatment Process with Ozone Application  

Kang, Tae-Hee (Department of Environmental Engineering, Yonsei University)
Oh, Byung-Soo (Department of Environmental Engineering, Yonsei University)
Kwon, Soon-Buhm (International Institute for Water and Wastewater, Korea Water Resources Corporation)
Sohn, Byeong-Yong (Hoengseong, Korea Water Resources Corporation)
Kang, Joon-Wun (Department of Environmental Engineering, Yonsei University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.6, 2005 , pp. 663-669 More about this Journal
Abstract
The aim of this study was to investigate the ozone decay pattern for the effective application of ozone in drinking water treatment. In order to measure the ozone decomposition in water, ozone measuring instrument was developed with flow injection analysis (FIA) method. From the result of continuous residual ozone concentration in water, it was confirmed that the ozone decay pattern was divided with instantaneous ozone demand(I.D) and pseudo first-order rate($k_c$) phases, which were influenced by the variation of ozone dose. The empirical model obtained from I.D and $k_c$ values enabled us to predict the residual ozone concentration according to the reaction time, showing the high correlation between model and experimental values. The concentration of OH radical and $R__{ct}$ could be indirectly measured by OH radical probe compound. In both I.D and $k_c$ phases, the production pattern of OH radical could be observed, which was also affected by the variation of ozone dose. Finally, it was confirmed that the ozone consumption rate was varied according to the each drinking water treatment process and seasoning. Therefore, the optimum position and dosage of ozone have to be selected by considering various factors.
Keywords
Ozone; Drinking Water Treatment; Instantaneous Ozone Demand; Ozone Decomposition Rate; Ozone Consumption Rate;
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