Hydrolysis of food waste with immobilized biofilm as a pretreatment method for the enhancement of biogas production

Mohamed Ali, Amina and Alam, Md Zahangir and Mohamed Abdoul‐Latif, Fatouma and Jami, Mohammed Saedi and Mohamed, Jalludin and Ainane, Tarik (2023) Hydrolysis of food waste with immobilized biofilm as a pretreatment method for the enhancement of biogas production. Sustainability, 15 (4). pp. 1-17. E-ISSN 2071-1050

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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 com‐ posite 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%).

Item Type:	Article (Journal)
Uncontrolled Keywords:	food waste; treatment; hydrolysis; biofilm; biogas production
Subjects:	T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Dr. Md. Zahangir Alam
Date Deposited:	13 Feb 2023 10:23
Last Modified:	06 Jul 2023 16:55
URI:	http://irep.iium.edu.my/id/eprint/103669

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