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Design of Low-Cost Ethanol Production Medium from Syngas: An Optimization of Trace Metals for Clostridium ljungdahlii

Author

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  • Simge Sertkaya

    (Research and Application Center for Environmental Problems, Ege University, Izmir 35100, Turkey
    Environmental Engineering Department, Engineering Faculty, Balikesir University, Balikesir 10145, Turkey)

  • Nuri Azbar

    (Department of Bioengineering, Ege University, Izmir 35100, Turkey)

  • Haris Nalakath Abubackar

    (Chemical Engineering Laboratory, Faculty of Sciences and Centre for Advanced Scientific Research (CICA), University of A Coruña, Rúa da Fraga 10, 15008 A Coruña, Spain)

  • Tugba Keskin Gundogdu

    (Department of Environmental Protection, Izmir Democracy University, Izmir 35140, Turkey)

Abstract

Syngas fermentation via the Wood-Ljungdahl (WL) pathway is a promising approach for converting gaseous pollutants (CO and CO 2 ) into high-value commodities. Because the WL involves several enzymes with trace metal components, it requires an adequate supply of micronutrients in the fermentation medium for targeted bioprocessing such as bioethanol production. Plackett-Burman statistical analysis was performed to examine the most efficient trace elements (Ni, Mg, Ca, Mn, Co, Cu, B, W, Zn, Fe, and Mo) and their concentrations for Clostridium ljungdahlii on ethanol production. Overall, 1.5 to 2.5 fold improvement in ethanol production could be achieved with designed trace element concentrations. The effects of tungsten and copper on ethanol and biomass production were determined to be the most significant, respectively. The model developed was statistically significant and has the potential to significantly decrease the cost of trace element solutions by 18–22%. This research demonstrates the critical importance of optimizing the medium for syngas fermentation in terms of product distribution and economic feasibility.

Suggested Citation

  • Simge Sertkaya & Nuri Azbar & Haris Nalakath Abubackar & Tugba Keskin Gundogdu, 2021. "Design of Low-Cost Ethanol Production Medium from Syngas: An Optimization of Trace Metals for Clostridium ljungdahlii," Energies, MDPI, vol. 14(21), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:6981-:d:663845
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    References listed on IDEAS

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