Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent

doi:10.1016/j.cjche.2020.10.047

Chinese Journal of Chemical Engineering ›› 2022, Vol. 44 ›› Issue (4): 310-320.DOI: 10.1016/j.cjche.2020.10.047

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Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent

Kamel Hendaoui, Malika Trabelsi-Ayadi, Fadhila Ayari

Laboratory of Applications of Chemistry to Natural Resources and Substances and the Environment (LACReSNE), University of Carthage, Faculty of Sciences of Bizerte, Zarzouna 7021, Tunisia

Received:2020-08-04 Revised:2020-09-26 Online:2022-06-18 Published:2022-04-28
Contact: Kamel Hendaoui,E-mail:hendaouik@yahoo.fr,hendaouik1@gmail.com
Supported by:
I would like to express my deepest appreciation to all those who provided me the possibility to achieve this work. A special thanks to the SITEX managers and employees for providing equipment, effluent and their proficiency and trust. I sincerely thank the technical team of the national office of mines for providing equipment and for their help to characterize the local clay. My warm thanks also to the editor and reviewers for their time and valuable feedback.

Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent

Kamel Hendaoui, Malika Trabelsi-Ayadi, Fadhila Ayari

Laboratory of Applications of Chemistry to Natural Resources and Substances and the Environment (LACReSNE), University of Carthage, Faculty of Sciences of Bizerte, Zarzouna 7021, Tunisia

通讯作者: Kamel Hendaoui,E-mail:hendaouik@yahoo.fr,hendaouik1@gmail.com
基金资助:
I would like to express my deepest appreciation to all those who provided me the possibility to achieve this work. A special thanks to the SITEX managers and employees for providing equipment, effluent and their proficiency and trust. I sincerely thank the technical team of the national office of mines for providing equipment and for their help to characterize the local clay. My warm thanks also to the editor and reviewers for their time and valuable feedback.

Abstract

Abstract: The aims of this study is to design and optimize the functioning of a full continuous combined process based on electrocoagulaion-adsorption on crude Tunisian clay to treat a real textile effluent. The clay characterization shows that the used clay is a rich-smectite clay. The response surface methodology (RSM) technique based on Box-Behnken design (BBD) was used to optimize the process. At optimum conditions which are initial pH solution of 8.24, effluent flow rate of 0.5 L·min^-1, voltage of 70 V, and added suspension of clay flow rate of 100 ml·min^-1 the achieved color, chemical oxygen demand (COD) and total suspended solid (TSS) removal efficiencies were respectively 96.87%, 89.77% and 84.46% with 0.75USD·m^-3 as total cost. The additional laboratory experiments at optimum conditions agree with the predicted results, which confirm the accuracy and the capability of RSM to predict results in the defined space. Finally the designed process could be a good eco-friendly alternative to treat and reuse wastewater in industrial process with reasonable cost.

Key words: Combined process, Textile effluent, Electrocoagulation, Adsorption, Decontamination efficiencies, Response surface methodology

摘要： The aims of this study is to design and optimize the functioning of a full continuous combined process based on electrocoagulaion-adsorption on crude Tunisian clay to treat a real textile effluent. The clay characterization shows that the used clay is a rich-smectite clay. The response surface methodology (RSM) technique based on Box-Behnken design (BBD) was used to optimize the process. At optimum conditions which are initial pH solution of 8.24, effluent flow rate of 0.5 L·min^-1, voltage of 70 V, and added suspension of clay flow rate of 100 ml·min^-1 the achieved color, chemical oxygen demand (COD) and total suspended solid (TSS) removal efficiencies were respectively 96.87%, 89.77% and 84.46% with 0.75USD·m^-3 as total cost. The additional laboratory experiments at optimum conditions agree with the predicted results, which confirm the accuracy and the capability of RSM to predict results in the defined space. Finally the designed process could be a good eco-friendly alternative to treat and reuse wastewater in industrial process with reasonable cost.

关键词: Combined process, Textile effluent, Electrocoagulation, Adsorption, Decontamination efficiencies, Response surface methodology

Kamel Hendaoui, Malika Trabelsi-Ayadi, Fadhila Ayari. Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent[J]. Chinese Journal of Chemical Engineering, 2022, 44(4): 310-320.

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Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent

Optimization of continuous electrocoagulation-adsorption combined process for the treatment of a textile effluent

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