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Drying Technology
An International Journal
Volume 28, 2010 - Issue 9: Selected Papers from the 6th Asia-Pacific Drying Conference
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Original Articles

Electroosmotic Flows in Sludge at Dewatering

Zhen Yang Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing, China
,
Ay Su Fuel Cell Center, Department of Mechanical Engineering, Yuan Ze University, Taoyuan, Taiwan
,
Arun S. Mujumdar Department of Mechanical Engineering, National University of Singapore, Singapore
&
Duu-Jong Lee Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, TaiwanCorrespondence[email protected]
Pages 1113-1117 | Published online: 15 Sep 2010
 
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Abstract

Electroosmotic dewatering of activated sludge is an important transport process playing a critical role in electroosmotic dewatering of sludge. In the present work, a comprehensive physical model considering both pressure-driven and electroosmosis-driven flows in an activated sludge floc was developed and numerically solved. Meshes were produced via scanning images based on real sludge flocs. The permeabilities of pressure and electroosmotic flows were evaluated, from which the total detwatering flow rate can be estimated.

ACKNOWLEDGMENT

This research is currently supported by the National Science Foundation of China (Contract No. 50876024).

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