Abstract
The dairy industry is among the most contaminated of the food industries. Dairy industry wastewater contains a high organic load and chemical oxygen demand (COD). In recent years, due to the development of the dairy industry, the administration of dairy effluents has become the main problem since dairy effluents can be a dangerous and significant threat, especially to the aqueous environment. Therefore, there is an important need to improve the management and remediation of dairy effluents in order to ensure the economic viability of this major agricultural industry and to decrease environmental problems. Several works focused on the remediation of dairy wastewater. In this study, the effect of the electro-Fenton process on COD and turbidity removal from dairy wastewater was studied. The electro-Fenton process was optimized for four independent variables (pH, reaction time, volume of H2O2, and H2O2/Fe2+ (the molar ratio)). Moreover, the response surface methodology was utilized to design experiments and determine optimum operating conditions. Under optimal conditions (pH = 5.95, reaction time = 60 min, volume of H2O2 = 1.5 ml and the molar ratio of H2O2/Fe2+ = 1.8), the removal efficiency of COD was 95.8%. Also under optimal conditions (pH = 6.37, reaction time = 60 min, volume of H2O2 = 1.5 ml and the molar ratio of H2O2/Fe2+ = 2.09), the removal efficiency of turbidity was 97.2%.
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Acknowledgements
The authors thank the Ferdowsi University of Mashhad for the support provided.
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Financial support from the Ferdowsi University of Mashhad. Grant via Ministry of Science, Research and Technology in the Islamic Republic of Iran.
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A. Mohmmad designed and performed the experiments, derived the models, and analyzed the data. M.T. Hamed Mosavian supervised the project and was in charge of overall direction and planning. M.H. Haddad Khodaparast designed the device used in the treatment process and supervised the collection of samples and conducted experiments. A. Mohmmad wrote the manuscript in consultation with M.T. Hamed Mosavian and M.H. Haddad Khodaparast.
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Mohmmad, A., Hamed Mosavian, M.T. & Haddad Khodaparast, M.H. Electro-Fenton technology for dairy wastewater treatment. Int. J. Environ. Sci. Technol. 21, 35–42 (2024). https://doi.org/10.1007/s13762-023-05113-2
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DOI: https://doi.org/10.1007/s13762-023-05113-2