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

Author

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

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.

Suggested Citation

  • Syaichurrozi, Iqbal & Murtiningsih, Ika & Angelica, Elsa Christine & Susanti, Devi Yuni & Raharjo, Jarot & Timuda, Gerald Ensang & Darsono, Nono & Primeia, Sandia & Suwandi, Endang & Kurniawan, & Khae, 2024. "A preliminary study: Microbial electrolysis cell assisted anaerobic digestion for biogas production from Indonesian tofu-processing wastewater at various Fe additions," Renewable Energy, Elsevier, vol. 234(C).
    • Handle: RePEc:eee:renene:v:234:y:2024:i:c:s0960148124012710
    DOI: 10.1016/j.renene.2024.121203
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    References listed on IDEAS

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    1. Qin, Yujie & Chen, Linyi & Wang, Tongyu & Ren, Junyi & Cao, Yan & Zhou, Shaoqi, 2019. "Impacts of ferric chloride, ferrous chloride and solid retention time on the methane-producing and physicochemical characterization in high-solids sludge anaerobic digestion," Renewable Energy, Elsevier, vol. 139(C), pages 1290-1298.
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    4. Syaichurrozi, Iqbal & Basyir, M. Fakhri & Farraz, Rafi Muhammad & Rusdi, Rusdi, 2020. "A preliminary study: Effect of initial pH and Saccharomyces cerevisiae addition on biogas production from acid-pretreated Salvinia molesta and kinetics," Energy, Elsevier, vol. 207(C).
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