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A Case Study on Chlorine Dioxide Usage at a Conventional Water Treatment Plant  

Lee, Song-Hee (Korea Water and Wastewater Works Association)
Lee, Byung-Doo (Korea Water Resources Corporation (KOWACO) Regional Water Supply Business Dept.)
Kim, Jin-Keun (KOWACO Water Supply Operations and Maintenance Dept.)
Seog, Kwon-Soo (KOWACO Water Resources Management Dept.)
Lee, Joung-Taek (KOWACO Yongdam Dam Management Dept.)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.1, 2005 , pp. 115-119 More about this Journal
Abstract
As the regulations on DBPs are tightened, many water treatment plants (WTPs) in Korea have already introduced or will introduce enhanced coagulation, alternative disinfectants and advanced treatments such as ozonization and granular activated carbon to improve drinking water qualify. After a phenol leakage accident at the Nakdong-River in 1991, 26 WIPs in Korea introduced carbon dioxide generators, but there has been no accumulation of significant operating data. This research summarizes things that should be considered for the introduction of carbon dioxide disinfection process to WTPs based on one year operation data from A WTP that has had high concentration of DBP during a specific period in the summer. The removal efficiency of DBP was $30{\sim}40%$, but those of 2-MIB, Geosmin were less than 10%. The generation rate of $ClO_2$ by-products such as chlorite and chlorate were $70{\sim}100%$ of input dosage, but the ratios increased over time. At the same time, strong chlorine odors may be produced in the distribution system when $ClO_2$ was used with $Cl_2$ as a result of reaction between the chlorite and residual chlorine.
Keywords
Chlorine Dioxide; DBPs; Chlorite; Chlorate;
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  • Reference
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