Hollow fibre bioreactor for ethanol production: Application to the conversion of lactose by Kluyveromyces fragilis |
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Authors: | Mohamed A. Mehaia Munir Cheryan |
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Affiliation: | Department of Food Science, University of Illinois, Dairy Manufactures Building, Urbana, Illinois 61801, USA |
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Abstract: | Kluyveromyces fragilis cells have been packed into the shell side of an industrial size hollow fibre module. The feed was pumped through the tube side under pressure. During continuous, single-pass operation with a synthetic lactose medium containing 50 g l?1lactose, ethanol productivity was 30–60 g l?1h?1at dilution rates of 1–4 h?1. With 150 g l?1lactose concentration, the productivity was 100–135 g l?1h?1. Productivity was generally lower when cottage cheese whey permeate (45 g l?1lactose) was used as the feed. Long-term stability of the hollow fibre bioreactor was good, provided adequate care was taken to bleed the gas generated and restrict cell concentration in the shell side. |
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Keywords: | Whey membrane bioreactor fermentation ethanol To whom correspondence should be addressed. |
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