Experimental Study of the Electro-osmotic Dewatering in Hangbag

CAO Ming-Jie*, 1, Ding Chun-Mei1, Ren Ze-Dong2
1 Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
2 Shangdong Surver and Desing Institute of Water Conservancy, Jinan 250013, China

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© 2015 Ming-Jie et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China; E-mail:


In recent years, geotube began to be widely used in treatment of coastal reclamation projects. However, the dewatering of sludge in geotube is inefficient. In this paper, for improving dewatering efficiency and laying a basis for the further study of large-scale electro-osmotic dewatering in geotube, electroosmosis has been applied to silt dewatering experiments in small hangbag. By measuring the change of moisture content, electricity current, voltage and comparing with other experiments under different conditions, the following conclusions have been obtained: the electro-osmotic dewatering speed is much faster than the natural dewatering. The non-woven fabric bag is easier to dewater than the high strength fabric bag which is made by the company of Royal Tencate.

Keywords: Dewatering, electroosmosis, geotube, hangbag, sludge.