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Performance of Backwashing Process in Biological Activated Carbon Column  

Lee, Gangchoon (Department of Environmental Engineering/Center of Industrial Technology, Dong-eui University)
Yoon, Taekyung (Department of Environmental Engineering/Center of Industrial Technology, Dong-eui University)
Moon, Byunghyun (Department of Environmental Engineering, Changwon National University)
Noh, ByeongIl (Department of Advanced Materials Engineering, Dongseo University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.6, 2006 , pp. 1082-1087 More about this Journal
Abstract
BAC backwashing process in ozone-BAC advanced water treatment process was experimentally studied. The operation and performance of backwashing were evaluated by measuring the effects of water temperature and water input rate on the backwashing interval and duration, and also the change of the amounts of biofilm and HPC in treated water before and after backwashing. The experiments were carried out with the pilot scale test module built in a existing water treatment plant, and the following results were obtained. Longer backwashing time than that of design operating condition was needed for satisfying the suitable turbidity of washing water effluent. Depending on water temperature, 7 days of backwashing cycle was recommended for the period lower than $15^{\circ}C$, and 10 days for the period higher than $15^{\circ}C$. After backwashing, the amounts of biofilm and HPC decreased to 1/10 and 80%, respectively.
Keywords
Advanced water treatment; BDOC; Biological activated carbon; DOC; Ozonation; Ozone; Water purification;
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