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Hydrolysis of Food Waste with Immobilized Biofilm as a Pretreatment Method for the Enhancement of Biogas Production

Author

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  • Amina Mohamed Ali

    (Medicinal Research Institute, Centre d’Etudes et de Recherche de Djibouti, IRM-CERD, Route de l’Aéroport, Haramous B.P. 486, Djibouti City 77101, Djibouti
    Bioenvironmental Engineering Research Centre, Department of Chemical Engineering and Sustainability, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia)

  • Md Alam Zahangir

    (Bioenvironmental Engineering Research Centre, Department of Chemical Engineering and Sustainability, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia)

  • Fatouma Mohamed Abdoul-Latif

    (Medicinal Research Institute, Centre d’Etudes et de Recherche de Djibouti, IRM-CERD, Route de l’Aéroport, Haramous B.P. 486, Djibouti City 77101, Djibouti)

  • Mohammed Saedi Jami

    (Bioenvironmental Engineering Research Centre, Department of Chemical Engineering and Sustainability, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia)

  • Jalludin Mohamed

    (Medicinal Research Institute, Centre d’Etudes et de Recherche de Djibouti, IRM-CERD, Route de l’Aéroport, Haramous B.P. 486, Djibouti City 77101, Djibouti)

  • Tarik Ainane

    (Superior School of Technology of Khenifra, University of Sultan Moulay Slimane, BP 170, Khenifra 54000, Morocco)

Abstract

The present study shows the opportunity of using biofilm in the hydrolysis step of food waste (FW) to increase biogas production. Therefore, screened biofilm-producing microorganisms were adopted to facilitate the biodegradation of organic compounds (OCs) and enhance the volume of biogas production. The biofilm-producing microorganisms were first immobilized on a granular activated carbon (GAC) surface, and the optimum values of immobilization time, mass of the GAC surface, and size of the microbial inoculums were found using the statistical methods of one-factor-at-a-time (OFAT) and the response surface methodology (RSM) using a face-centered central composite design (FCCCD). Based on the results, 48 h of incubation, 8 g of GAC, and 1 mL of inoculum were the optimum conditions when shaken at 37 °C and 150 rpm. Different biofilm amounts (328 mg, 492 mg, 656 mg, 820 mg, and 984 mg) were used in hydrolysis flasks operated in batch mode to increase the degradation of the OCs. The optimal level of the hydrolysis degradation was on day 3 and at 328 mg of biofilm; the total solid (TS) content was decreased from 115 gL −1 to 79 gL −1 (31%), and the TCOD was decreased from 85.33 gL −1 to 54.50 gL −1 (36%).

Suggested Citation

  • Amina Mohamed Ali & Md Alam Zahangir & Fatouma Mohamed Abdoul-Latif & Mohammed Saedi Jami & Jalludin Mohamed & Tarik Ainane, 2023. "Hydrolysis of Food Waste with Immobilized Biofilm as a Pretreatment Method for the Enhancement of Biogas Production," Sustainability, MDPI, vol. 15(4), pages 1-17, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3316-:d:1065076
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    References listed on IDEAS

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