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Energies 2017, 10(8), 1207; https://doi.org/10.3390/en10081207

Enhanced Production of Bioethanol by Fermentation of Autohydrolyzed and C4mimOAc-Treated Sugarcane Bagasse Employing Various Yeast Strains

1
Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
2
Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996-2200, USA
3
SA-CIRBS, International Islamic University, Islamabad 45320, Pakistan
4
Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
5
Center of Renewable Carbon, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN 37996-4542, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Talal Yusaf
Received: 16 July 2017 / Revised: 8 August 2017 / Accepted: 10 August 2017 / Published: 14 August 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

This study examines the fermentation of autohydrolyzed and 1-n-butyl-3-methylimidazolium acetate (C4mimOAc) pretreated sugarcane bagasse, using four different yeast strains to determine the efficiency of bioethanol production. Three strains of Saccharomyces cerevisiae (S. cerevisiae) and one of Scheffersomyces stipitis (S. stipitis) were employed in this study. It was observed that the sugarcane bagasse autohydrolyzed at 205 °C for 6 min with subsequent enzymatic hydrolysis exhibited the maximum ethanol yield of 70.92 ± 0.09 mg/g-substrate when S. cerevisiae MZ-4 was used. However, a slightly higher ethanol yield of 78.78 ± 0.94 mg/g-substrate was obtained from C4mimOAc pretreated bagasse employing S. cerevisiae MZ-4. The study showed that the newly isolated MZ-4 strain exhibited better ethanol yield as compared to commercially available yeast strains S. cerevisiae Uvaferm-43, S. cerevisiae Lalvin EC-1118, and S. stipitis. View Full-Text
Keywords: fermentation; bioethanol; Saccharomyces cerevisiae; ionic liquid; autohydrolysis; pretreatment fermentation; bioethanol; Saccharomyces cerevisiae; ionic liquid; autohydrolysis; pretreatment
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Hashmi, M.; Shah, A.A.; Hameed, A.; Ragauskas, A.J. Enhanced Production of Bioethanol by Fermentation of Autohydrolyzed and C4mimOAc-Treated Sugarcane Bagasse Employing Various Yeast Strains. Energies 2017, 10, 1207.

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