通过电浮选（EF）改善活性污泥的浓缩和脱水特性。

Improvement of the thickening and dewatering characteristics of activated sludge by electroflotation (EF).

作者信息

Choi Y G, Kim H S, Park Y H, Jeong S H, Son D H, Oh Y K, Yeom I T

机构信息

Department of Civil and Environmental Engineering, Sungkyunkwan University, Suwon, Korea.

出版信息

Water Sci Technol. 2005;52(10-11):219-26.

PMID:16459795

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 30 minutes 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. In addition, the EF thickened sludge showed much better dewaterability both in SRF and cake solid content. It is induced that the air bubbles entrapped in the thickened sludge play a key role in the observed dewaterbility improvement.

摘要

使用实验室规模的间歇式浮选反应器研究了电浮选（EF）对活性污泥浓缩的性能。测试了包括膨胀污泥在内的四种活性污泥。电浮选运行30分钟后，电浮选可实现57-84%的污泥体积减少，而同期重力浓缩仅能实现约1.5-14%的污泥体积减少。对于所有污泥样品，电浮选运行后，出水水质在总化学需氧量（TCOD）、悬浮物（SS）和浊度方面均得到改善。此外，电浮选浓缩后的污泥在比阻（SRF）和饼状固体含量方面均表现出更好的脱水性能。据推测，浓缩污泥中截留的气泡在观察到的脱水性能改善中起关键作用。