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Effect of hemicellulose and lignin removal on enzymatic hydrolysis of steam pretreated corn stover

Öhgren, Karin LU ; Bura, Renata; Saddler, Jack and Zacchi, Guido LU (2007) In Bioresource Technology 98(13). p.2503-2510
Abstract
Ethanol can be produced from lignocellulosic biomass using steam pretreatment followed by enzymatic hydrolysis and fermentation. The sugar yields, from both hemicellulose and cellulose are critical parameters for an economically-feasible ethanol production process. This study shows that a hear-theoretical glucose yield (96-104%) from acid-catalysed steam pretreated corn stover can be obtained if xylanases are used to supplement cellulases during hydrolysis. Xylanases hydrolyse residual hemicellulose, thereby improving the access of enzymes to cellulose. Under these conditions, xylose yields reached 70-74%. When pre-treatment severity was reduced by using autocatalysis instead of acid-catalysed steam pretreatment, xylose yields were... (More)
Ethanol can be produced from lignocellulosic biomass using steam pretreatment followed by enzymatic hydrolysis and fermentation. The sugar yields, from both hemicellulose and cellulose are critical parameters for an economically-feasible ethanol production process. This study shows that a hear-theoretical glucose yield (96-104%) from acid-catalysed steam pretreated corn stover can be obtained if xylanases are used to supplement cellulases during hydrolysis. Xylanases hydrolyse residual hemicellulose, thereby improving the access of enzymes to cellulose. Under these conditions, xylose yields reached 70-74%. When pre-treatment severity was reduced by using autocatalysis instead of acid-catalysed steam pretreatment, xylose yields were increased to 80-86%. Partial delignification of pretreated material was also evaluated as a way to increase the overall sugar yield. The overall glucose yield increased slightly due to delignification but the overall xylose yield decreased due to hemicellulose loss in the delignification step. The data also demonstrate that steam pretreatment is a robust process: corn stover from Europe and North America showed only minor differences in behaviour. (c) 2006 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
hemicellulose hydrolysis, xylanases, ethanol pulping, steam pretreatment, delignification
in
Bioresource Technology
volume
98
issue
13
pages
2503 - 2510
publisher
Elsevier
external identifiers
  • wos:000247382700007
  • scopus:33947430562
ISSN
1873-2976
DOI
10.1016/j.biortech.2006.09.003
language
English
LU publication?
yes
id
2e46f13a-37ff-4b86-9c0d-e6f9dc69609a (old id 648592)
date added to LUP
2007-12-19 09:20:07
date last changed
2017-11-12 03:57:09
@article{2e46f13a-37ff-4b86-9c0d-e6f9dc69609a,
  abstract     = {Ethanol can be produced from lignocellulosic biomass using steam pretreatment followed by enzymatic hydrolysis and fermentation. The sugar yields, from both hemicellulose and cellulose are critical parameters for an economically-feasible ethanol production process. This study shows that a hear-theoretical glucose yield (96-104%) from acid-catalysed steam pretreated corn stover can be obtained if xylanases are used to supplement cellulases during hydrolysis. Xylanases hydrolyse residual hemicellulose, thereby improving the access of enzymes to cellulose. Under these conditions, xylose yields reached 70-74%. When pre-treatment severity was reduced by using autocatalysis instead of acid-catalysed steam pretreatment, xylose yields were increased to 80-86%. Partial delignification of pretreated material was also evaluated as a way to increase the overall sugar yield. The overall glucose yield increased slightly due to delignification but the overall xylose yield decreased due to hemicellulose loss in the delignification step. The data also demonstrate that steam pretreatment is a robust process: corn stover from Europe and North America showed only minor differences in behaviour. (c) 2006 Elsevier Ltd. All rights reserved.},
  author       = {Öhgren, Karin and Bura, Renata and Saddler, Jack and Zacchi, Guido},
  issn         = {1873-2976},
  keyword      = {hemicellulose hydrolysis,xylanases,ethanol pulping,steam pretreatment,delignification},
  language     = {eng},
  number       = {13},
  pages        = {2503--2510},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Effect of hemicellulose and lignin removal on enzymatic hydrolysis of steam pretreated corn stover},
  url          = {http://dx.doi.org/10.1016/j.biortech.2006.09.003},
  volume       = {98},
  year         = {2007},
}