Evaluation of the cellobiose-fermenting yeastBrettanomyces custersii in the simultaneous saccharification and fermentation of cellulose

0301 basic medicine 03 medical and health sciences
DOI: 10.1007/bf01021255 Publication Date: 2005-01-20T08:26:18Z
ABSTRACT
Brettanomyces custersii (CBS 5512) was identified as a promising glucose- and cellobiose-fermenting yeast for the simultaneous saccharification and fermentation (SSF) of cellulose for ethanol production. In SSF studies with 75 g/L of cellulose,B. custersii produced 32 g/L of ethanol in just 3 days (75% of theoretical yield). This yield represents an increase of more than 16% over the yields of other fementative yeasts and the time to achieve it is less than that with other organisms. In addition, the ethanol tolerance ofB. custersii seems to be greater than that of other cellobiose-fermenting yeasts considered to date. Overall, the combination of higher yields, rates, and ethanol concentrations obtained withB. custersii improves the economics of ethanol production.
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