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Improvement of the Thickening Characteristics of Activated Sludge by Electroflotation (EF)  

Choi, Young Gyun (대구대학교 환경공학과)
Chung, Tai Hak (서울대학교 지구환경시스템공학부)
Yeom, Ick Tae (성균관대학교 토목환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.19, no.3, 2005 , pp. 295-300 More about this Journal
Abstract
The performances of electroflotation (EF) on the thickening of activated sludge were investigated using laboratory scale batch flotation reactors. Four activated sludges including bulking sludges were tested. After 30minutes of EF operation, 57-84 % of sludge volume reduction could be achieved by EF, while only about 1.5-14% could be obtained by gravity thickening for the same period. After thickening the effluent water quality in terms of TCOD, SS, and turbidity was improved by EF operation for all sludge samples. It is induced that the air bubbles entrapped in the thickened sludge play a key role in the observed improvement of sludge thickening and effluent quality.
Keywords
Activated sludge; electroflotation(EF); micro-bubble; thickening;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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