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

Ilona Sárvári Horváth; A. Sjode; B. Alriksson; L. J. Jonsson; N. O. Nilvebrant

Critical conditions for improved fermentability during overliming of acid hydrolysates from spruce
Journal article, 2005

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.

Saccharomyces cerevisiae

inhibitors

ethanol

detoxification

optimization

detoxification

fermentation inhibitors

lignocellulose

saccharomyces-cerevisiae

fuel ethanol

lignocellulose

softwood

Author

Ilona Sárvári Horváth

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Other publications Research

A. Sjode

B. Alriksson

L. J. Jonsson

N. O. Nilvebrant

Applied Biochemistry and Biotechnology

0273-2289 (ISSN) 15590291 (eISSN)

Vol. 121 1031-1044

Subject Categories

Energy Engineering

More information

Created

10/6/2017

Critical conditions for improved fermentability during overliming of acid hydrolysates from spruce Journal article, 2005