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J Korean Soc Environ Eng > Volume 38(9); 2016 > Article
J Korean Soc Environ Eng 2016;38(9): 513-520. doi: https://doi.org/10.4491/KSEE.2016.38.9.513
탈기와 부상 공정에 의한 소독부산물의 제거특성에 관한 비교 연구
차화정1, 원찬희2, 이강학3, 오원규4, 곽동희4
1전주시 맑은물사업본부
2전북대학교 환경공학과
3한국수자원공사
4서남대학교 환경화학공학과
Comparative Study on Removal Characteristics of Disinfection By-products by Air Stripping and Flotation Processes
Hwa-Jeong Cha1, Chan-Hee Won2, Kang-Hag Lee3, Won-Kyu Oh4, Dong-Heui Kwak4
1Water Work Headguarters, Jeonju City
2Department of Environmental Engineering, Chonbuk National University
3K-water, Korea Water Resources Corporation
4Department of Environmental and Chemical Engineering, Seonam University
Corresponding author  Dong-Heui Kwak ,Tel: 063-620-0223, Fax: 063-620-0211, Email: kwak124@hanmail.net
Received: July 1, 2016;  Revised: August 22, 2016;  Accepted: September 12, 2016.  Published online: September 30, 2016.
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, KLa 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.
Key Words: Air Stripping, Bubble, Disinfection By-Products, Flotation, Trihalomethane
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