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Modeling and Optimization of COD Removal from Leachate by Electrocoagulation: Application of Central Composite Design

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Abstract

The present study aims to investigate the treatment of leachate by the electrocoagulation (EC) process using aluminum electrodes. A response surface methodology (RSM)-based central composite design (CCD) was carried out to design the experiments, develop a statistical model, assess the relationship between the four variables, and predict the responses, namely, the chemical oxygen demand (COD). The removal efficiency of COD, biological organic matter (BOD5), and turbidity were about 90%, 92.3%, and 99.6%, respectively, under optimum operational conditions, i.e., initial pH (5.3), current intensity (1.2 A), electrolysis time (75 min), and stirring speed (150 rpm). The operating cost of the current EC treatment was 0.6 €/m3. Moreover, the coefficient of determination (R2) revealed a satisfactory agreement between observed and expected results. Therefore, RSM is an appropriate approach to determine the key parameters for electrocoagulation process.

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Data Availability

The authors confirm that the data supporting the findings of this study are available within the article and its supplementary information files.

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Acknowledgements

The authors present their recognition to the head of the Process Engineering department of the Faculty of Applied Sciences, UKM Ouargla, for his corporation. The authors are also grateful to Pr. Dr. Toudert Ahmed Zaid (Department of Chemical Engineering, National polytechnic school, Algiers, Algeria) for his guidance and valuable advice. We thank the anonymous reviewers whose corrections and constructive suggestions have significantly increased the overall quality of the manuscript.

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  1. Département de Génie des procédés, Route de Ghardaia, Université Kasdi Merbah, BP.511, (30 000), Ouargla, Algérie

    Ridha Lessoued, Lotfi Baameur & Ahmed Tabchouche

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  1. Ridha Lessoued
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Contributions

R Lessoued wrote the paper, designed experiments, performed the statistical analysis, and participated in the interpretation of the data. Baameur and A Tabchouche contributed to the analysis of the results, helped to draft the manuscript, and participated in its revisions. All authors read and approved the final manuscript.

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Correspondence to Ridha Lessoued.

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Lessoued, R., Baameur, L. & Tabchouche, A. Modeling and Optimization of COD Removal from Leachate by Electrocoagulation: Application of Central Composite Design. Environ Model Assess 26, 423–432 (2021). https://doi.org/10.1007/s10666-021-09765-7

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  • DOI: https://doi.org/10.1007/s10666-021-09765-7

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