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Critical conditions for improved fermentability during overliming of acid hydrolysates from spruce

Ilona Sárvári Horváth (Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik) ; A. Sjode ; B. Alriksson ; L. J. Jonsson ; N. O. Nilvebrant
Applied Biochemistry and Biotechnology (0273-2289). Vol. 121 (2005), p. 1031-1044.
[Artikel, refereegranskad vetenskaplig]

Bioethanol can be produced from wood via acid hydrolysis, but detoxification is needed to achieve good fermentability. Overliming was investigated in a factorial designed experiment, in which pH and temperature were varied. Degradation of inhibitory furan aldehydes was more extensive compared to monosaccharides. Too harsh conditions led to massive degradation of sugars and formation of inhibiting acids and phenols. The ethanol productivity and yield after optimal overliming reached levels exceeding reference fermentations of pure glucose. A novel metric, the balanced ethanol yield, which takes both ethanol production and losses of fermentable sugars into account, was introduced and showed the optimal conditions within the investigated range. The findings allow process technical and economical considerations to govern the choice of conditions for overliming.

Nyckelord: detoxification, ethanol, inhibitors, lignocellulose, optimization, Saccharomyces cerevisiae, saccharomyces-cerevisiae, fermentation inhibitors, fuel ethanol, lignocellulose, detoxification, softwood


26th Symposium on Biotechnology for Fuels and Chemicals, May 9-12, 2004, Chattanooga, TN



Denna post skapades 2010-02-25.
CPL Pubid: 115038

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik (2005-2014)

Ämnesområden

Kemisk energiteknik

Chalmers infrastruktur