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<p>Biohydrogen is produced by dark fermentation of organic waste, which is a simple, affordable, and quick bioconversion process and it is considered as a viable alternative energy source. The waste product or residue left over after fermentation procedures for bioethanol production from biomass is known as bioethanol industrial digestate BEID. This research reports on the impact of synthetic immobilization bioplastic support on biochemical hydrogen potential, studies the BHP test of BEID, and examines the I/S ratio. This study is interesting in that it looks at how the yield of biohydrogen is affected by 3D printed support material. Dark fermentation process was performed with four batch tests at initial pH (5.5), and temperature 55 ± 2&#xa0;°C temperature. For kinetic modeling of experimental hydrogen production values, Kinetic analysis of the experimental results was fitted by the modified <i>Gompertz</i> and <i>modified Logistique</i> models. According to the results the maximum hydrogen produced volume, 61&#xa0;mL (215,53&#xa0;mL/gVS), was produced after 30&#xa0;days of BEID fermentation without pretreatment when the I/S ratio was 1/5&#xa0;gVS/gVS. The presence of supports inside the batch test fermenter is proportionate to their number introduced, in comparison to hydrogen production without immobilization, fermentation with six supports produces a maximum hydrogen volume of 199&#xa0;mL (703.14&#xa0;mL/gVS) after 12&#xa0;days, multiplied by 3.26 refers to hydrogen production without immobilization. The <i>modified Logistic kinetic model</i> and <i>Gompertz model</i> both match the experimental data quite well. Therefore, it appears that immobilizing cells with bioplastic is a promising method for growth cells and increasing the generation of biohydrogen and decrease the fermentation time.</p> Graphical Abstract <p></p>

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Utilization of 3D Printing for Improving Biohydrogen Production by Dark Fermentation of Bioethanol Industrial Digestate

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Esma Mahfouf Bouchareb,
  • Kerroum Derbal,
  • Fatima Zohra Meguellati,
  • Abdelatif BenKaida,
  • Asma Bouchraine,
  • Nadir Dizge

摘要

Biohydrogen is produced by dark fermentation of organic waste, which is a simple, affordable, and quick bioconversion process and it is considered as a viable alternative energy source. The waste product or residue left over after fermentation procedures for bioethanol production from biomass is known as bioethanol industrial digestate BEID. This research reports on the impact of synthetic immobilization bioplastic support on biochemical hydrogen potential, studies the BHP test of BEID, and examines the I/S ratio. This study is interesting in that it looks at how the yield of biohydrogen is affected by 3D printed support material. Dark fermentation process was performed with four batch tests at initial pH (5.5), and temperature 55 ± 2 °C temperature. For kinetic modeling of experimental hydrogen production values, Kinetic analysis of the experimental results was fitted by the modified Gompertz and modified Logistique models. According to the results the maximum hydrogen produced volume, 61 mL (215,53 mL/gVS), was produced after 30 days of BEID fermentation without pretreatment when the I/S ratio was 1/5 gVS/gVS. The presence of supports inside the batch test fermenter is proportionate to their number introduced, in comparison to hydrogen production without immobilization, fermentation with six supports produces a maximum hydrogen volume of 199 mL (703.14 mL/gVS) after 12 days, multiplied by 3.26 refers to hydrogen production without immobilization. The modified Logistic kinetic model and Gompertz model both match the experimental data quite well. Therefore, it appears that immobilizing cells with bioplastic is a promising method for growth cells and increasing the generation of biohydrogen and decrease the fermentation time.

Graphical Abstract