Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge

›› 2010, Vol. 18 ›› Issue (4): 562-568.

Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge

于晓艳, 张书廷, 徐辉, 郑磊, 吕学斌, 马德刚

School of Environmental Science and Technology, Tianjin University, Tianjin 300072, China

收稿日期:2009-11-02 修回日期:2010-05-15 出版日期:2010-08-28 发布日期:2010-08-28
通讯作者: ZHANG Shuting, E-mail:zhangst@tju.edu.cn
基金资助:
Supported by Tianjin Application Basis and Advanced Technology Studied Plans(09JCYBJC08200)

Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge

YU Xiaoyan, ZHANG Shuting, XU Hui, ZHENG Lei, L黊uebin, MA Degang

School of Environmental Science and Technology, Tianjin University, Tianjin 300072, China

Received:2009-11-02 Revised:2010-05-15 Online:2010-08-28 Published:2010-08-28

摘要/Abstract

摘要： The mechanical dewatering of activated sludge is troublesome due to its high compressibility of solids. The dewatering can be enhanced dramatically by the use of electroosmosis,in which an electric field is applied to the sludge cake.In this study,the influence of filter cloth on the cathode on the dewatering of activated sludge was investigated.It was found that thicker filter cloth led to lower water removal from the sludge cake,so a stainless steel cathode net with small pore size instead of filter cloth was applied,which improves the dewatering efficiency and reduces the electric power consumption.Moreover,water absorbent materials were helpful to remove the water from the sludge cake.For the electroosmotic dewatering at 7 kPa and 24 V·cm^-1,the water content in the sludge cake decreased to 60% (by mass) with the average 0.075 kW·h·kg^-1 of water removed by using the cathode net.

关键词: activated sludge, eletroosmotic dewatering, filter cloth, cathode

Abstract: The mechanical dewatering of activated sludge is troublesome due to its high compressibility of solids. The dewatering can be enhanced dramatically by the use of electroosmosis,in which an electric field is applied to the sludge cake.In this study,the influence of filter cloth on the cathode on the dewatering of activated sludge was investigated.It was found that thicker filter cloth led to lower water removal from the sludge cake,so a stainless steel cathode net with small pore size instead of filter cloth was applied,which improves the dewatering efficiency and reduces the electric power consumption.Moreover,water absorbent materials were helpful to remove the water from the sludge cake.For the electroosmotic dewatering at 7 kPa and 24 V·cm^-1,the water content in the sludge cake decreased to 60% (by mass) with the average 0.075 kW·h·kg^-1 of water removed by using the cathode net.

Key words: activated sludge, eletroosmotic dewatering, filter cloth, cathode

于晓艳, 张书廷, 徐辉, 郑磊, 吕学斌, 马德刚. Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge[J]. , 2010, 18(4): 562-568.

YU Xiaoyan, ZHANG Shuting, XU Hui, ZHENG Lei, L黊uebin, MA Degang. Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge[J]. , 2010, 18(4): 562-568.

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Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge

Influence of Filter Cloth on the Cathode on the Electroosmotic Dewatering of Activated Sludge

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