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    Separation, hydrolysis and fermentation of pyrolytic sugars to produceethanol and lipids

    Access Status
    Fulltext not available
    Authors
    Lian, J.
    Chen, S.
    Zhou, S.
    Wang, Z.
    O'Fallon, J.
    Li, Chun-Zhu
    Garcia-Perez, M.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Lian, Jieni and Chen, Shulin and Zhou, Shuai and Wang, Zhouhong and O'Fallon, James and Li, Chun-Zhu and Garcia-Perez, Manuel. 2010. Separation, hydrolysis and fermentation of pyrolytic sugars to produceethanol and lipids. Bioresource Technology. 101 (24): pp. 9688-9699.
    Source Title
    Bioresource Technology
    DOI
    10.1016/j.biortech.2010.07.071
    ISSN
    09608524
    School
    Curtin Centre for Advanced Energy Science and Engineering
    URI
    http://hdl.handle.net/20.500.11937/15200
    Collection
    • Curtin Research Publications
    Abstract

    This paper describes a new scheme to convert anhydrosugars found in pyrolysis oils into ethanol and lipids. Pyrolytic sugars were separated from phenols by solvent extraction and were hydrolyzed into glucose using sulfuric acid as a catalyst. Toxicological studies showed that phenols and acids were the main species inhibiting growth of the yeast Saccharomyces cerevisiae. The sulfuric acids, and carboxylic acids from the bio-oils, were neutralized with Ba(OH)2. The phase rich in sugar was further detoxified with activated carbon. The resulting aqueous phase rich in glucose was fermented with three different yeasts: S. cerevisiae to produce ethanol, and Cryptococcus curvatus and Rhodotorula glutinis to produce lipids. Yields as high as 0.473g ethanol/g glucose and 0.167g lipids/g sugar (0.266g ethanol equivalent/g sugar), were obtained. These results confirm that pyrolytic sugar fermentation to produce ethanol is more efficient than for lipid production.

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