LABORATROY STUDY ON ELECTROKINETIC DEWATERING OF SEWAGE SLUDGE
This paper presents a laboratory study on the use of electrokinetic technique to dewater the sludge collected from a wastewater treatment plant. Simulation tests were carried out on the specimens accommodated in a purposely-designed cylindrical cell. Voltage gradient ranging from 2 to 8 V/cm was applied to drive the movement of water within sludge towards the cathode. Results showed that a linear relationship exists between electroosmotic flow and current. Both the electroosmotic flow and current decreased gradually during the dewatering process as a result of an increase in the electrical resistance of the specimens. The residual water content of sludge showed a non-uniform distribution along the direction from anode towards cathode. A lowest water content of 62％ was obtained at the anode, and the dewatering extent is proportional to the electric intensity.
sludge electrokinetic dewatering electroosmotic flow current residual water content
Yuan FENG Tony L.T.ZHAN Yun-Min CHEN Quan-Fang ZHANG
MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang Univ., China
国际会议
International Symposium on Geoenvironmental Engineering(国际环境岩土工程研讨会
杭州
英文
662-665
2009-09-08（万方平台首次上网日期，不代表论文的发表时间）