Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10393852 | Biomass and Bioenergy | 2005 | 11 Pages |
Abstract
Furfural, acetate and lactate were the main inhibitors present in the acid hydrolysate of stillage. The lignin-derived inhibitors hydroxymethylfuraldehyde, hydroxybenzaldehyde, vanillin and syringaldehyde were not detected. Neutralisation of the hydrolysate with lime to pH 5 decreased the concentration of furfural by 50%. Fermentation of hydrolysate supplemented with glucose 10Â g/L, by recombinant Zymomonas mobilis ZM4(pZB5), produced 11Â g/L of ethanol after 70Â h, with residual xylose 12Â g/L. Supplementation of the hydrolysate with 5Â g/L yeast extract and 40Â g/L glucose produced 28Â g/L ethanol with 2.6Â g/L residual xylose after 18Â h. Arabinose was not utilised by this particular recombinant strain. From the results, Z. mobilis ZM4(pZB5) may be a suitable candidate for the fermentation of both glucose and xylose in stillage acid hydrolysates.
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Authors
Linda Davis, Young-Jae Jeon, Charles Svenson, Peter Rogers, John Pearce, Paul Peiris,