Effect of Combined Particle Size Reduction and Fe 3 O 4 Additives on Biogas and Methane Yields of Arachis hypogea Shells at Mesophilic Temperature

Kehinde O. Olatunji, Daniel M. Madyira, Noor A. Ahmed and Oyetola Ogunkunle
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Kehinde O. Olatunji: Department of Mechanical Engineering Science, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2006, South Africa
Daniel M. Madyira: Department of Mechanical Engineering Science, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2006, South Africa
Noor A. Ahmed: Department of Mechanical Engineering Science, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2006, South Africa
Oyetola Ogunkunle: Department of Mechanical Engineering Science, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2006, South Africa

Energies, 2022, vol. 15, issue 11, 1-15

Abstract: Enzymatic hydrolysis of lignocellulose materials has been identified as the rate-limiting step during anaerobic digestion. The application of pretreatment techniques can influence the biodegradability of lignocellulose substrate. This study combined Fe 3 O 4 nanoparticles, which serve as a heterogeneous catalyst during anaerobic digestion, with different particle sizes of Arachis hypogea shells. Batch anaerobic digestion was set up at mesophilic temperature for 35 days. The results showed that 20 mg/L Fe 3 O 4 additives, as a single pretreatment, significantly influence biogas and methane yields with an 80.59 and 106.66% increase, respectively. The combination of 20 mg/L Fe 3 O 4 with a 6 mm particle size of Arachis hypogea shells produced the highest cumulative biogas yield of 130.85 mL/gVS added and a cumulative methane yield of 100.86 mL/gVS added . This study shows that 20 mg/L of Fe 3 O 4 additive, combined with the particle size pretreatment, improved the biogas and methane yields of Arachis hypogea shells. This result can be replicated on the industrial scale to improve the energy recovery from Arachis hypogea shells.

Keywords: anaerobic digestion; lignocellulose materials; pretreatment; nanoparticles; particle size; biogas; methane (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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