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Electroosmotic dewatering: an efficient method of sludge management

Jami, Mohammed Saedi and Iwata, Masashi and Tanaka, Takanori (2015) Electroosmotic dewatering: an efficient method of sludge management. In: Water Malaysia 2015, 22th - 24th April 2015, Kuala Lumpur Convention Centre, Malaysia. (Unpublished)

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The purpose of this work is to summarize our latest research results about constant- current electro-osmotic dewatering (EOD) as an efficient method for sludge management. The Terzaghi-Voigt combined model is used for the analysis of electroosmotic dewatering (EOD) of various solid-liquid systems by considering the creep deformation of materials. Bentonite clay, KC-flock, zinc oxide and some of their mixtures are used as experimental materials representing environmental sludge. It is assumed that the electro-osmotic pressure gradient Epg and modified consolidation coefficient Ce of the materials are constant. The relation between the ratio of creep deformation to total deformation B and the modified consolidation coefficient Ce is determined and compared with previous observations for the case of mechanical expression. The effectiveness of dewatering is analyzed based on operating parameters such as pre-consolidation pressure, material composition, electric current density and total solid volume per unit cross-sectional area. The model is verified by comparing the calculations with experimental data. The results show that Elecrtro-osmotic dewatering, as main solid-liquid separation process, is best applied for materials with permanent charge.

Item Type: Conference or Workshop Item (Speech/Talk)
Additional Information: 5545/43106
Uncontrolled Keywords: Sludge dewatering; Electoosmosis; Creep effect; Effectiveness of dewatering
Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Prof. Ir. Dr. Mohammed Saedi Jami, PhD CEng MIChemE
Date Deposited: 08 Jun 2015 14:25
Last Modified: 08 Jun 2015 14:25
URI: http://irep.iium.edu.my/id/eprint/43106

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