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The effect of prehydrolysis and improved mixing on high-solids batch simultaneous saccharification and fermentation of spruce to ethanol

Hoyer, Kerstin LU ; Galbe, Mats LU and Zacchi, Guido LU (2013) In Process Biochemistry 48(2). p.289-293
Abstract
In the production of ethanol from lignocellulosic material, it is necessary to reach a high ethanol concentration after fermentation. Simply increasing the substrate concentration leads to stirring problems and inhibition of the enzymes and yeast in the process. Batch simultaneous saccharification and fermentation (SSF) of steam-pretreated spruce with 13.7% water-insoluble solids (WIS) (25% total solids (TS)) was run in a stirred-tank reactor as well as in two reactors designed to handle solid or semi-solid material. In all reactors, the overall ethanol yields were only between Sand 6%. Fermentation of the liquid fraction of the steam-pretreated spruce slurry resulted in an overall ethanol yield of 85%. 22 h of prehydrolysis at 48 degrees... (More)
In the production of ethanol from lignocellulosic material, it is necessary to reach a high ethanol concentration after fermentation. Simply increasing the substrate concentration leads to stirring problems and inhibition of the enzymes and yeast in the process. Batch simultaneous saccharification and fermentation (SSF) of steam-pretreated spruce with 13.7% water-insoluble solids (WIS) (25% total solids (TS)) was run in a stirred-tank reactor as well as in two reactors designed to handle solid or semi-solid material. In all reactors, the overall ethanol yields were only between Sand 6%. Fermentation of the liquid fraction of the steam-pretreated spruce slurry resulted in an overall ethanol yield of 85%. 22 h of prehydrolysis at 48 degrees C prior to SSF at 32 C significantly increased the overall ethanol yield to 72% (final ethanol concentration of 47.8 g/L), using the whole slurry of steam-pretreated spruce at a dry matter content of 13.7% WIS (25% TS). (C) 2013 Elsevier Ltd. All rights reserved. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SSF, Fuel ethanol, High dry matter, High solids, Prehydrolysis
in
Process Biochemistry
volume
48
issue
2
pages
289 - 293
publisher
Elsevier
external identifiers
  • wos:000316582500013
  • scopus:84875239518
ISSN
1873-3298
DOI
10.1016/j.procbio.2012.12.020
language
English
LU publication?
yes
id
cf7c6b54-cf0a-47ba-b307-eae526e60e2f (old id 3843085)
date added to LUP
2016-04-01 10:52:04
date last changed
2020-11-03 04:15:08
@article{cf7c6b54-cf0a-47ba-b307-eae526e60e2f,
  abstract     = {In the production of ethanol from lignocellulosic material, it is necessary to reach a high ethanol concentration after fermentation. Simply increasing the substrate concentration leads to stirring problems and inhibition of the enzymes and yeast in the process. Batch simultaneous saccharification and fermentation (SSF) of steam-pretreated spruce with 13.7% water-insoluble solids (WIS) (25% total solids (TS)) was run in a stirred-tank reactor as well as in two reactors designed to handle solid or semi-solid material. In all reactors, the overall ethanol yields were only between Sand 6%. Fermentation of the liquid fraction of the steam-pretreated spruce slurry resulted in an overall ethanol yield of 85%. 22 h of prehydrolysis at 48 degrees C prior to SSF at 32 C significantly increased the overall ethanol yield to 72% (final ethanol concentration of 47.8 g/L), using the whole slurry of steam-pretreated spruce at a dry matter content of 13.7% WIS (25% TS). (C) 2013 Elsevier Ltd. All rights reserved.},
  author       = {Hoyer, Kerstin and Galbe, Mats and Zacchi, Guido},
  issn         = {1873-3298},
  language     = {eng},
  number       = {2},
  pages        = {289--293},
  publisher    = {Elsevier},
  series       = {Process Biochemistry},
  title        = {The effect of prehydrolysis and improved mixing on high-solids batch simultaneous saccharification and fermentation of spruce to ethanol},
  url          = {http://dx.doi.org/10.1016/j.procbio.2012.12.020},
  doi          = {10.1016/j.procbio.2012.12.020},
  volume       = {48},
  year         = {2013},
}