A preliminary study: Microbial electrolysis cell assisted anaerobic digestion for biogas production from Indonesian tofu-processing wastewater at various Fe additions

Iqbal Syaichurrozi, Ika Murtiningsih, Elsa Christine Angelica, Devi Yuni Susanti, Jarot Raharjo, Gerald Ensang Timuda, Nono Darsono, Sandia Primeia, Endang Suwandi, Kurniawan, and Deni Shidqi Khaerudini

Renewable Energy, 2024, vol. 234, issue C

Abstract: Tofu-processing wastewater (TPW) is very abundant in Indonesia. This study aimed to examine the impact of Fe additions (0–600 mg-FeCl3/L) on biogas yield from TPW through anaerobic digestion (AD) without and with microbial electrolysis cells (MEC). The presence of MEC in AD increased biogas yield by 14.4–114.5 %. The optimum Fe addition either in AD or MEC-AD was 400 mg-FeCl3/L. Prediction accuracy was higher for the modified Gompertz model compared to first-order and modified Logistic models because it had a higher R2 (0.9942). The presence of MEC in AD increased ym, μ, and λ values. MEC-AD resulted in pollutant removal efficiencies 1.09 to 1.63 times higher than AD. Based on energy analysis, AD and MEC-AD resulted in surplus energy of 3582.1 and 5325.1 J, respectively. It means that the presence of MC in AD successfully increased the surplus energy by about 1.5 times.

Keywords: Anaerobic digestion; Biogas; Fe; Microbial electrolysis cell; Tofu-processing wastewater (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:234:y:2024:i:c:s0960148124012710

DOI: 10.1016/j.renene.2024.121203

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