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    Yeast fermentation of carboxylic acids obtained from pyrolytic aqueous phases for lipid production

    Access Status
    Fulltext not available
    Authors
    Lian, J.
    Garcia-Perez, M.
    Coates, R.
    Wu, Hongwei
    Chen, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Lian, J. and Garcia-Perez, M. and Coates, R. and Wu, H. and Chen, S. 2012. Yeast fermentation of carboxylic acids obtained from pyrolytic aqueous phases for lipid production. Bioresource Technology. 118: pp. 177-186.
    Source Title
    Bioresource Technology
    DOI
    10.1016/j.biortech.2012.05.010
    ISSN
    09608524
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/41919
    Collection
    • Curtin Research Publications
    Abstract

    The presence of very reactive C1–C4 molecules adversely affects the quality bio-oils produced from thepyrolysis of lignocellulosic materials. In this paper a scheme to produce lipids with Cryptococcus curvatus from the carboxylic acids in the pyrolytic aqueous phase collected in fractional condensers is proposed. The capacities of three oleaginous yeasts C. curvatus, Rhodotorula glutinis, Lipomyces starkeyi to ferment acetate, formate, hydroxylacat-aldehyde, phenol and acetol were investigated. While acetate could be a good carbon source for lipid production, formate provides additional energy and contributes to yeast growth and lipid production as auxiliary energy resource. Acetol could slightly support yeast growth, but it inhibits lipid accumulation. Hydroxyacetaldehyde and phenols showed high yeast growth and lipid accumulation inhibition. A pyrolytic aqueous phase with 20 g/L acetate was fermented with C. curvatus, after neutralization and detoxification to produce 6.9 g/L dry biomass and 2.2 g/L lipid.

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