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Yeast strains for ethanol production from lignocellulosic hydrolysates during in situ detoxification

Paper ID Volume ID Publish Year Pages File Format Full-Text
14740 1244 2009 5 PDF Available
Title
Yeast strains for ethanol production from lignocellulosic hydrolysates during in situ detoxification
Abstract

Yeast strains Y1, Y4 and Y7 demonstrated high conversion efficiencies for sugars and high abilities to tolerate or metabolize inhibitors in dilute-acid lignocellulosic hydrolysates. Strains Y1 and Y4 completely consumed the glucose within 24 h in dilute-acid lignocellulosic hydrolysate during in situ detoxification, and the maximum ethanol yields reached 0.49 g and 0.45 g ethanol/g glucose, equivalent to maximum theoretical values of 96% and 88.2%, respectively. Strain Y1 could metabolize xylose to xylitol with a yield of 0.64 g/g xylose, whereas Y4 was unable to utilize xylose as a substrate. Strain Y7 was able to consume sugars (glucose and xylose) within 72 h during hydrolysate in situ detoxification, producing a high ethanol yield (equivalent to 93.6% of the maximum theoretical value). Y1 and Y7 are the most efficient yeast strains yet reported for producing ethanol from non-detoxified dilute-acid lignocellulosic hydrolysates. These findings offer huge potential for improving the economics of bio-ethanol production from lignocellulosic hydrolysates.

Keywords
Yeast strains; Dilute-acid lignocellulosic hydrolysate; In situ detoxification; Ethanol fermentation
First Page Preview
Yeast strains for ethanol production from lignocellulosic hydrolysates during in situ detoxification
Publisher
Database: Elsevier - ScienceDirect
Journal: Biotechnology Advances - Volume 27, Issue 5, September–October 2009, Pages 656–660
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering