Analysis of combined operation of electro-osmetic dewatering and mechanical expression

Jami, Mohammed Saedi and Iwata, Masashi (2009) Analysis of combined operation of electro-osmetic dewatering and mechanical expression. In: Filtration & Separation Symposium and Exhibition in collaboration with INCHEM Tokyo 2009, 19-20th November 2009, TIME24 Bld. Aomi, Tokyo, Japan.

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Abstract

This paper presents results of experimental work carried out to study and analyze the combined operation of electro-osmotic dewatering (EOD) and mechanical expression (ME) by use of the Terzaghi-Voigt combined model for considering creep deformation of the material. The EOD-ME process combines the advantage of electro-osmosis and mechanical dewatering, resulting in reduced void ratio compared to individual operation. The basic differential equation based on the model is solved analytically by assuming that both an electro-osmotic pressure gradient Epg and a modified consolidation coefficient Ce of the material are constant, resulting in the equation of solid compressive pressure in the material as a function of time and position. The analysis also leads to the equation of the average consolidation ratio Uc, which is a measure of the progress of dewatering; this equation can describe well the empirical results under various conditions. The large water content ofbentonite slurry can be reduced well by the EOD-ME combined operation.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	5545/1270
Uncontrolled Keywords:	electro-osmotic dewatering (EOD),mechanical expression, ME
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Prof. Ir. Dr. Mohammed Saedi Jami, PhD CEng MIChemE
Date Deposited:	30 Dec 2011 10:18
Last Modified:	10 Jan 2012 12:02
URI:	http://irep.iium.edu.my/id/eprint/12707

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