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    Effect of Mixing on a Lab-Scale Bioreactor Productivity

    132121_13810_Chemeca 2009 Full Paper Emily Liew Wan Teng.pdf (80.41Kb)
    Access Status
    Open access
    Authors
    Liew, Emily
    Nandong, Jobrun
    Samyudia, Yudi
    Date
    2009
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Liew, Emily and Nandong, Jobrun and Samyudia, Yudi. 2009. Effect of Mixing on a Lab-Scale Bioreactor Productivity, in ICMS Pty Ltd (ed), CHEMECA 2009, Sep 27 2009. Burswood Entertainment Complex: Engineers Australia.
    Source Title
    Proceedings from CHEMECA 2009 Engineering our Future: Are we up to the Challenge?
    Source Conference
    CHEMECA 2009
    ISBN
    978-0858259225
    Faculty
    Sarawak
    School of Engineering and Science
    Miri Campus
    Department of Chemical Engineering
    School
    Curtin Sarawak - Faculty Office
    URI
    http://hdl.handle.net/20.500.11937/13383
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we study the impact of variable mixing conditions arising from the different sets of aeration rate and stirrer speed on the ethanolic fermentation process, which utilizes the hydrolyzed cassava starch as carbon source. Interestingly, over the ranges of aeration rate and stirrer speed used in the study, the ethanol yield varied from 10% to 85% of theoretical maximum yield. Additionally over these experimental conditions, the selectivity of ethanol over glycerol varied from 3.6 to 12.3. One conclusion that can be drawn from this experimental study is that, the large variations in yield, selectivity and ethanol formation rate were more likely due to the different mixing conditions resulting from different values of aeration rate and stirrer speed, and less likely due to glucose and growth rates as previously reported.

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