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http://dx.doi.org/10.4491/KSEE.2016.38.9.513

Comparative Study on Removal Characteristics of Disinfection By-products by Air Stripping and Flotation Processes  

Cha, Hwa-Jeong (Water Work Headguarters, Jeonju City)
Won, Chan-Hee (Department of Environmental Engineering, Chonbuk National University)
Lee, Kang-Hag (K-water, Korea Water Resources Corporation)
Oh, Won-Kyu (Department of Environmental and Chemical Engineering, Seonam University)
Kwak, Dong-Heui (Department of Environmental and Chemical Engineering, Seonam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.38, no.9, 2016 , pp. 513-520 More about this Journal
Abstract
It is well known that volatile compounds including disinfection by-products as well as emissive dissolved gas in water can be removed effectively by air stripping. The micro-bubbles of flotation unit are so tiny as microns while the diameter of fine bubbles applied to air stripping is ranged from hundreds to thousands of micrometer. Therefore, the micro-bubbles in flotation can supply very wide specific surface area to transfer volatile matters through gas-liquid boundary. In addition, long emission time also can be gained to emit the volatile compound owing to the slow rise velocity of micro-bubbles in the flotation tank. There was a significant difference of the THMs species removal efficiency between air stripping and flotation experiments in this study. Moreover, the results of comparative experiments on the removal characteristics of THMs between air stripping and flotation revealed that the mass transfer coefficient, $K_La$ showed obvious differences. To overcome the limit of low removal efficiency of dissolved volatile compounds such as THMs in flotation process, the operation range of bubble volume concentration is required to higher than the operation condition of conventional particle separation.
Keywords
Air Stripping; Bubble; Disinfection By-Products; Flotation; Trihalomethane;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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