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Ethanol, methane, or both? Enzyme dose impact on ethanol and methane production from untreated energy crop switchgrass varieties

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  • Başar, İ.A.
  • Kökdemir Ünşar, E.
  • Ünyay, H.
  • Perendeci, N.A.

Abstract

The production of bioethanol and subsequent methane from two raw switchgrass varieties with the addition of cellulase and β-glucosidase dose combinations was investigated in this study. Maximum ethanol production increment for the investigated varieties, Shawneé and Kanlow, were determined as 211.9% and 166.7%, respectively, compared to the control assays without enzymes. Considering higher ethanol production a priority, 42.0 mg EtOH/gVS and 223.5 mLCH4/gVS were produced from Shawneé variety at 50 EGU cellulase – 80 IU β-glucosidase doses. 20.2 mgEtOH/gVS, and 400.7 mLCH4/gVS were produced from Kanlow variety at 75 EGU cellulase – 80 IU β-Glucosidase doses. Furthermore, the highest total biofuel energy productions were found as 10750,9 MJ/tonne field dried switchgrass at 75 EGU cellulase – 20 IU β-glucosidase doses for Shawneé and 13556,9 MJ/tonne field dried switchgrass at 75 EGU cellulase – 80 IU β-glucosidase doses for Kanlow. Shawneé variety was found to be more suitable for cellulosic ethanol production.

Suggested Citation

  • Başar, İ.A. & Kökdemir Ünşar, E. & Ünyay, H. & Perendeci, N.A., 2020. "Ethanol, methane, or both? Enzyme dose impact on ethanol and methane production from untreated energy crop switchgrass varieties," Renewable Energy, Elsevier, vol. 149(C), pages 287-297.
    • Handle: RePEc:eee:renene:v:149:y:2020:i:c:p:287-297
    DOI: 10.1016/j.renene.2019.12.025
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    References listed on IDEAS

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    1. Tan, Inn Shi & Lee, Keat Teong, 2014. "Enzymatic hydrolysis and fermentation of seaweed solid wastes for bioethanol production: An optimization study," Energy, Elsevier, vol. 78(C), pages 53-62.
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    1. Hilal Unyay & Piotr Piersa & Magdalena Zabochnicka & Zdzisława Romanowska-Duda & Piotr Kuryło & Ksawery Kuligowski & Paweł Kazimierski & Taras Hutsol & Arkadiusz Dyjakon & Edyta Wrzesińska-Jędrusiak &, 2023. "Torrefaction of Willow in Batch Reactor and Co-Firing of Torrefied Willow with Coal," Energies, MDPI, vol. 16(24), pages 1-23, December.
    2. Başar, İbrahim Alper & Perendeci, Nuriye Altınay, 2021. "Optimization of zero-waste hydrogen peroxide - Acetic acid pretreatment for sequential ethanol and methane production," Energy, Elsevier, vol. 225(C).
    3. Mariana Abreu & Luís Silva & Belina Ribeiro & Alice Ferreira & Luís Alves & Susana M. Paixão & Luísa Gouveia & Patrícia Moura & Florbela Carvalheiro & Luís C. Duarte & Ana Luisa Fernando & Alberto Rei, 2022. "Low Indirect Land Use Change (ILUC) Energy Crops to Bioenergy and Biofuels—A Review," Energies, MDPI, vol. 15(12), pages 1-68, June.

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