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Fungal Strain as Biological Tool to Remove Genotoxicity Effect of Phenolic Compounds from Olive Mill Wastewater

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  • Aziz Boutafda

    (Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Cadi Ayyad University, Marrakesh 40000, Morocco
    African Sustainable Agriculture Research Institute (ASARI), Mohammed VI Polytechnic University (UM6P), Laayoune 70000, Morocco)

  • Mohamed Hafidi

    (Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Cadi Ayyad University, Marrakesh 40000, Morocco
    Agrobiosciences (AgBs) Department, College for Sustainable Agriculture and Environmental Science, Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

  • Yedir Ouhdouch

    (Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Cadi Ayyad University, Marrakesh 40000, Morocco
    Agrobiosciences (AgBs) Department, College for Sustainable Agriculture and Environmental Science, Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

  • Eric Pinelli

    (Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, INP-ENSAT, UPS, Avenue de l’Agrobiopôle, F-31326 Castanet-Tolosan, France)

  • Martin Jemo

    (Agrobiosciences (AgBs) Department, College for Sustainable Agriculture and Environmental Science, Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco)

  • Loubna El Fels

    (Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Cadi Ayyad University, Marrakesh 40000, Morocco)

Abstract

This study aims to select fungi isolates to reduce olive mill wastewater (OMWW) chemical oxygen demand (COD) and phenolic compounds (PC), as well as their genotoxicity effect. Treatment with mold, isolated by an innovative technique using phenolic compound-selective media, showed a reduction rate of about 4% for COD and 2% for PC during one month of incubation without optimization of the treatment conditions. Whereas this percentage reached 98% and 96% for COD and PC, respectively, after only 12 days of treatment, when the C:N ratio was adjusted to 30 by adding urea as a nitrogen source at 150 rpm agitation speed. Genetic sequence homology of the most efficient mold isolate showed 100% similarity to Penicillium chrysogenum . High-performance liquid chromatography analysis of phenolic extracts of untreated OMWW showed the presence of five compounds—hydroxytyrosol at 1.22 g.L −1 , tyrosol at 0.05 g.L −1 , caffeic acid at 0.16 g.L −1 , p-coumaric acid at 0.05 g.L −1 and oleuropein at 0.04 g.L −1 —that were eliminated during the degradation process at 88.82%. Genotoxicity, assessed by the Vicia-faba root cell, showed a significant decrease in micronucleus frequency of about 96% after fungal treatment. These results confirm the positive role of fungal treatment of OMWW to eliminate genotoxicity and their ability to improve the agronomic potential.

Suggested Citation

  • Aziz Boutafda & Mohamed Hafidi & Yedir Ouhdouch & Eric Pinelli & Martin Jemo & Loubna El Fels, 2023. "Fungal Strain as Biological Tool to Remove Genotoxicity Effect of Phenolic Compounds from Olive Mill Wastewater," Sustainability, MDPI, vol. 15(8), pages 1-18, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:8:p:6510-:d:1121230
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    References listed on IDEAS

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    1. Mohamed Aboelfetoh & Amro Hassanein & Mohamed Ragab & Mohamed El-kassas & Ezzat R. Marzouk, 2022. "Olive Mill Waste-Based Anaerobic Digestion as a Source of Local Renewable Energy and Nutrients," Sustainability, MDPI, vol. 14(3), pages 1-18, January.
    2. Boutheina Gargouri & Samia Ben Brahim & Fatma Marrakchi & Bechir Ben Rouina & Wojciech Kujawski & Mohamed Bouaziz, 2022. "Impact of Wastewater Spreading on Properties of Tunisian Soil under Arid Climate," Sustainability, MDPI, vol. 14(6), pages 1-15, March.
    3. Hamza El Moudden & Yousra El Idrissi & Chakir El Guezzane & Zineb Lakhlifi El Idrissi & Hicham Harhar & Hamza Assaggaf & Khang Wen Goh & Long Chiau Ming & Abdelhakim Bouyahya & Mohamed Tabyaoui, 2022. "Spatial Variation of Phytochemical and Antioxidant Activities of Olive Mill Wastewater: A Chemometric Approach," Sustainability, MDPI, vol. 14(21), pages 1-13, November.
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