A review of electrocoagulation technology for the treatment of textile wastewater

The conventional coagulation technique of textile wastewater treatments is plagued with the issue of low removal rate of pollutants and generation of a large quantity of sludge. Recently, electrocoagulation (EC) technique gained immense attention due to its efficiency. The technique involves dissolu...

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Main Authors: Naje, A. S., Chelliapan, S., Zakaria, Z., Ajeel, M. A., Alaba, P. A.
Format: Article
Published: Walter de Gruyter GmbH 2017
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Online Access:http://eprints.utm.my/id/eprint/80762/
http://dx.doi.org/10.1515/revce-2016-0019
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spelling my.utm.807622019-06-27T06:23:35Z http://eprints.utm.my/id/eprint/80762/ A review of electrocoagulation technology for the treatment of textile wastewater Naje, A. S. Chelliapan, S. Zakaria, Z. Ajeel, M. A. Alaba, P. A. T Technology (General) The conventional coagulation technique of textile wastewater treatments is plagued with the issue of low removal rate of pollutants and generation of a large quantity of sludge. Recently, electrocoagulation (EC) technique gained immense attention due to its efficiency. The technique involves dissolution of the sacrificial anodes to provide an active metal hydroxide as a strong coagulant that destabilizes and amasses particles and then removes them by precipitation or adsorption. EC process is influenced by operating parameters such as applied current density, electrodes material and configuration, type of electrical connection, pH and conductivity of the solution, and mixing state. Consequently, this work reviewed the major and minor reactions of EC process with operational parameters, design of EC cell, mass transfer studies and modeling, and industrial wastewater applications. The work also includes comparison of EC technique with conventional coagulation and combinations with other techniques. Special emphasis is on removal of pollutants from textile wastewater. Further, the electrical energy supplies and cost analysis are also discussed. Even though several publications have covered EC process recently, no review work has treated the systematic process design and how to minimize the effect of passivation layer deposited on the surface of the electrodes. EC process with rotating electrodes has been recommended to reduce this phenomenon. The effect of electrodes geometry is considered to enhance the conductivity of the cell and reduce energy consumption. The studies of ionic mass transfer were not implemented before special by limiting current method during the EC process. Moreover, no aforementioned studies used computational fluid dynamics modeling to present the mass transfer inside the EC reactor. Walter de Gruyter GmbH 2017 Article PeerReviewed Naje, A. S. and Chelliapan, S. and Zakaria, Z. and Ajeel, M. A. and Alaba, P. A. (2017) A review of electrocoagulation technology for the treatment of textile wastewater. Reviews in Chemical Engineering, 33 (3). pp. 263-292. ISSN 0167-8299 http://dx.doi.org/10.1515/revce-2016-0019 DOI:10.1515/revce-2016-0019
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic T Technology (General)
spellingShingle T Technology (General)
Naje, A. S.
Chelliapan, S.
Zakaria, Z.
Ajeel, M. A.
Alaba, P. A.
A review of electrocoagulation technology for the treatment of textile wastewater
description The conventional coagulation technique of textile wastewater treatments is plagued with the issue of low removal rate of pollutants and generation of a large quantity of sludge. Recently, electrocoagulation (EC) technique gained immense attention due to its efficiency. The technique involves dissolution of the sacrificial anodes to provide an active metal hydroxide as a strong coagulant that destabilizes and amasses particles and then removes them by precipitation or adsorption. EC process is influenced by operating parameters such as applied current density, electrodes material and configuration, type of electrical connection, pH and conductivity of the solution, and mixing state. Consequently, this work reviewed the major and minor reactions of EC process with operational parameters, design of EC cell, mass transfer studies and modeling, and industrial wastewater applications. The work also includes comparison of EC technique with conventional coagulation and combinations with other techniques. Special emphasis is on removal of pollutants from textile wastewater. Further, the electrical energy supplies and cost analysis are also discussed. Even though several publications have covered EC process recently, no review work has treated the systematic process design and how to minimize the effect of passivation layer deposited on the surface of the electrodes. EC process with rotating electrodes has been recommended to reduce this phenomenon. The effect of electrodes geometry is considered to enhance the conductivity of the cell and reduce energy consumption. The studies of ionic mass transfer were not implemented before special by limiting current method during the EC process. Moreover, no aforementioned studies used computational fluid dynamics modeling to present the mass transfer inside the EC reactor.
format Article
author Naje, A. S.
Chelliapan, S.
Zakaria, Z.
Ajeel, M. A.
Alaba, P. A.
author_facet Naje, A. S.
Chelliapan, S.
Zakaria, Z.
Ajeel, M. A.
Alaba, P. A.
author_sort Naje, A. S.
title A review of electrocoagulation technology for the treatment of textile wastewater
title_short A review of electrocoagulation technology for the treatment of textile wastewater
title_full A review of electrocoagulation technology for the treatment of textile wastewater
title_fullStr A review of electrocoagulation technology for the treatment of textile wastewater
title_full_unstemmed A review of electrocoagulation technology for the treatment of textile wastewater
title_sort review of electrocoagulation technology for the treatment of textile wastewater
publisher Walter de Gruyter GmbH
publishDate 2017
url http://eprints.utm.my/id/eprint/80762/
http://dx.doi.org/10.1515/revce-2016-0019
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score 13.2014675