Numerical evaluation of optimal approaches for electro-osmosis dewatering

A newly developed numerical model is used to identify and evaluate optimum electrode configurations for electro-osmosis dewatering, as well as to evaluate approaches such as current intermittence and current reversal. Various electrode configurations, electrode spacings, and voltage gradients are st...

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Bibliographic Details
Published in:Drying technology 2018-06, Vol.36 (8), p.973-989
Main Authors: Yuan, Jiao, Hicks, Michael A.
Format: Article
Language:English
Subjects:
Configurations
Dewatering
Electro-osmosis
Electrodes
Energy consumption
Energy efficiency
Mathematical models
Optimization
Osmosis
Polarity
Three dimensional models
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Summary:A newly developed numerical model is used to identify and evaluate optimum electrode configurations for electro-osmosis dewatering, as well as to evaluate approaches such as current intermittence and current reversal. Various electrode configurations, electrode spacings, and voltage gradients are studied numerically using 3D models with a cubic domain and vertically installed tube electrodes. The results indicate that, with more anodes installed, one can expect more water to drain out and a more uniform surface settlement, although a greater energy consumption is then required. A 2D square domain is used to study current intermittence and current reversal. Current intermittence allows more water to be drained out and has a higher energy efficiency compared to a continuous current, although it consumes more energy. Polarity reversal is also shown to be more efficient than a continuous current supply.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2017.1367693