Abstract
The current study focuses on investigating how to improve the efficacy of the combined process of aerated lagooning and adsorption for the treatment of olive mill wastewater (OMWW) from the olive industries in the Loukkos region using the design of experiments approach. The latter made it possible to optimize the experimental conditions, such as the mass concentration of lime, the mass concentration of powdered activated carbon (AC), and the speed of agitation (Va), which are required for the envisaged treatment, in order to control the results after the evaluation of the necessary physicochemical parameters, namely pH, total suspended solids (TSS), chemical oxygen demand (COD), rate of discoloration, and content of polyphenols. The experimental conditions necessary to carry out this study were between 1.4 and 1.75 g/l for AC, between 23 and 32 rpm for the stirring speed, and between 0.88 and 1.3 g/l for the mass concentration of lime. The results of this experiment showed that treating OMWW with the prototype II after adding lime to the mixture resulted in an estimated 85% reduction in the analyzed parameters. The pH, TSS, COD, discoloration rate, and polyphenol content were all reduced from initial values of 4.87, 0.63 (g/l), 80.3 (g (O2/l)), 0.8%, and 1.45 (g/l), respectively, to final values of 6.92, 0.12 (g/l), 12, 0.16%, and 0.25 (g/l). These results are highly significant when compared to those obtained during the treatment of prototype I using only powdered activated carbon, which showed a reduction rate of around 70%.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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The authors of this study present their sincere thanks to the Editor in Chief for managing this article and also to all anonymous reviewers for their great feedback and edits that have helped us improve the quality of this paper significantly.
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All authors contributed to the conception and design of the present paper. Abdesselam Eddaoukhi: methodology and data collection. Mohamed Berradi: conceptualization, writing the first draft of the manuscript, writing—reviewing and editing. Youssef El Rhayam: software and data collection. Lama Rissouli: methodology and formal analysis. Ahmed El Yacoubi: writing—reviewing and editing. Abdessamad Eddaoukhi: software and figure preparation. Omar Berradi: software and figure preparation. Abderrahim El Bachiri: writing—reviewing, editing, and supervision. Brahim Sallek and Hakima Nassali: supervision and resources. All authors read and approved the final version of the manuscript.
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Eddaoukhi, A., Berradi, M., El Rhayam, Y. et al. Aerated lagoon/adsorption combination method for the treatment of olive mill wastewater: optimizing parameters using study design. Environ Monit Assess 195, 1111 (2023). https://doi.org/10.1007/s10661-023-11726-4
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DOI: https://doi.org/10.1007/s10661-023-11726-4