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Sludge Thickening using Electro-Flotation in Water Treatment Plant  

Lee, Jun (금호엔지니어링)
Han, Mooyoung (서울대학교 지구환경시스템 공학부)
Dockko, Seok (단국대학교 토목환경공학부)
Park, Yonghyo (한국수자원공사)
Kim, Tschungil (서울대학교 지구환경시스템 공학부)
Kim, Mikyung (서울대학교 지구환경시스템 공학부)
Publication Information
Journal of Korean Society of Water and Wastewater / v.19, no.2, 2005 , pp. 155-160 More about this Journal
Abstract
Gravity thickening process has been widely used in WTP sludge thickening at domestic water treatment plant. The operation method of the process is very simple, however, the process requires long detention time about 24~48 hours for sludge thickening, uses polymer, and low total solids of thickened sludge to increase sludge thickening efficiency. To solve there problems, we studied about flotation process, especially, electro-flotation (EF) process in WTP sludge thickening. Electro-flotation process is simpler than dissolved-air-flotation(DAF) process because EF needs only electrode and current to generate micro-bubbles and the operation is easy. This study was performed at two batch columns to compare interface height, total solids, effluent turbidity between an electro-flotation thickening and a gravity thickening. According to the result, an electro-flotation thickening was that interface height was decreasing, total solids had high concentration, and effluent turbidity was low in comparison with a gravity thickening. Also, it will make the high efficiency of following process, such as a dehydrating process and digestive process. because of high total solids and low moisture content in the sludge.
Keywords
Gravity thickening; Electro-flotation thickening; Interface height; Total solids; Effluent turbidity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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