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Effects of EBCT and Water Temperature on HAA Removal using BAC Process  

Son, Hee-Jong (Water Quality Institute, Busan Water Authority)
Yoo, Soo-Jeon (Water Quality Institute, Busan Water Authority)
Yoo, Pyung-Jong (Water Quality Institute, Busan Water Authority)
Jung, Chul-Woo (Ulsan Regional Innovation Agency, Ulsan Industry Promotion Techno Park)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.12, 2008 , pp. 1255-1261 More about this Journal
Abstract
In this study, The effects of three different biological activated carbon (BAC) materials (each coal, coconut and wood based activated carbons), empty bed contact time (EBCT) and water temperature on the removal of haloacetic acid (HAA) 5 species in BAC filters were investigated. Experiments were conducted at three water temperatures (5, 10 and 20$^{\circ}C$) and four EBCTs (5, 10, 15 and 20 min). The results indicated that coal based BAC retained more attached bacterial biomass on the surface of the activated carbon than the other BAC, increasing EBCT or increasing water temperature increased the HAA 5 species removal in BAC columns. To achieve an HAA removal efficiency 50% or higher in a BAC filter, the authors suggest 10 min EBCT or longer for 5$^{\circ}C$ waters and 5 min EBCT for waters at 10$^{\circ}C$ or higher. The kinetic analysis suggested a first-order reaction model for HAA 5 species removal at various water temperatures (5, 10 and 20$^{\circ}C$). The pseudo-first-order reaction rate constants and half-lives were also calculated for HAA removal at 5, 10 and 20$^{\circ}C$. The pseudo-first-order reaction rate constants and half-lives were also calculated for HAA 5 species removal at 5$\sim$ 20$^{\circ}C$. The half-lives of HAA 5 species ranging from 0.75 to 18.58 min could be used to assist water utilities in designing and operating BAC filters for HAA removal.
Keywords
Chlorination By-Products; Haloacetic acids; Biological Activated Carbon; Biodegradation; Water Temperature; Empty Bed Contact Time; First-Order Reaction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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