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2024 | OriginalPaper | Chapter

19. Dual-Stage Solar-Powered Electrocoagulation and Electrooxidation Process for Textile Wastewater Treatment

Authors : Yemane G. Asfaha, Feleke Zewge, Teketel Yohannes, Shimelis Kebede

Published in: Land and Water Degradation in Ethiopia

Publisher: Springer Nature Switzerland

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Abstract

The textile industry is one of the significant consumers of dyestuff, chemicals, and water. As a result, a large amount of wastewater is generated. The wastewater discharged from the textile dyeing industry is challenging to treat using conventional treatment methods as these effluents are complex, toxic to microorganisms, and recalcitrant to biodegradation. Limited studies have demonstrated that the dual-stage electrocoagulation–electrooxidation (EC–EO) process is an efficient technology for eliminating different pollutants. However, the full potential of this technology to address the challenges faced by the textile industry in developing countries like Ethiopia has yet to be realized. Additionally, the pressing global issue of energy crisis and climate change calls for the use of renewable energy sources to power this technology. Therefore, to address this problem, a dual-stage solar-powered electrocoagulation (EC) and electrooxidation (EO) process has been evaluated for its capability to remove color, total organic carbon (TOC), and chemical oxygen demand (COD). Aluminum (Al) and iridium oxide coated on titanium (IrO₂/Ti) were selected as anode/cathode for EC and EC–EO experiments, respectively. The results were evaluated based on the interaction effects of operating parameters of the treatment methods on the percentage of COD, TOC, and color removal. The dual-stage EC–EO process obtained 97% COD, TOC, and color removal efficiency. In addition, the results of the combined spectroscopy analysis confirm the complete degradation of organic contaminants to carbon dioxide and water. In addition, the optimum operating conditions have been tested for real industrial wastewater effluents and have shown excellent performance in removing pollutants. Furthermore, the optimal working conditions were also evaluated using direct solar modules and showed comparable removal performance compared to using conventional electricity.

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Title: Dual-Stage Solar-Powered Electrocoagulation and Electrooxidation Process for Textile Wastewater Treatment
Authors: Yemane G. Asfaha
Feleke Zewge
Teketel Yohannes
Shimelis Kebede
Publisher: Springer Nature Switzerland
Book: Land and Water Degradation in Ethiopia
Print ISBN: 978-3-031-60250-4

Electronic ISBN: 978-3-031-60251-1

Copyright Year: 2024
DOI: https://doi.org/10.1007/978-3-031-60251-1_19