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Optimisation of steam pretreatment of SO2-impregnated mixed softwoods for ethanol production

Stenberg, K; Tengborg, C; Galbe, Mats LU and Zacchi, Guido LU (1998) In Journal of Chemical Technology and Biotechnology 71(4). p.299-308
Abstract
Pretreatment of mixed softwoods with SO2 impregnation and steam for production of ethanol has been investigated. The optimal conditions, both for sugar yield and ethanol yield, to assess the effect of inhibitors formed in the pretreatment, have been determined. The parameters investigated were: SO2 concentration (1-6% (w/w) dry matter), temperature (190-230 degrees C) and residence time (2-15 min). After pretreatment, the material was separated into a solid residue and a filtrate. The solid residue was enzymatically hydrolysed with 2% dry matter (w/w). To investigate fermentability, the hydrolysed filtrate was fermented using Saccharomyces cerevisiae. The effects of the different parameters are described by response-surface modelling. The... (More)
Pretreatment of mixed softwoods with SO2 impregnation and steam for production of ethanol has been investigated. The optimal conditions, both for sugar yield and ethanol yield, to assess the effect of inhibitors formed in the pretreatment, have been determined. The parameters investigated were: SO2 concentration (1-6% (w/w) dry matter), temperature (190-230 degrees C) and residence time (2-15 min). After pretreatment, the material was separated into a solid residue and a filtrate. The solid residue was enzymatically hydrolysed with 2% dry matter (w/w). To investigate fermentability, the hydrolysed filtrate was fermented using Saccharomyces cerevisiae. The effects of the different parameters are described by response-surface modelling. The highest experimental sugar yield of 42.1 g per 100 g dry matter was obtained at 210 degrees C and 5.5 min residence time. Although the fermentabilities were good for all filtrates with yields greater than 90% of the yield obtained in a pure glucose reference solution, the pretreatment has a clear influence on the ethanol production rate. (C) 1998 SCI. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SO2, steam pretreatment, softwoods, ethanol, enzymatic hydrolysis, fermentation
in
Journal of Chemical Technology and Biotechnology
volume
71
issue
4
pages
299 - 308
publisher
Wiley-Blackwell
external identifiers
  • wos:000072951400004
  • scopus:0031597240
ISSN
0268-2575
DOI
10.1002/(SICI)1097-4660(199804)71:4<299::AID-JCTB858>3.0.CO;2-Z
language
English
LU publication?
yes
id
3cc6e06b-cc6c-4a9f-97cc-04245547e383 (old id 3911429)
date added to LUP
2013-06-28 14:09:14
date last changed
2017-10-22 04:41:32
@article{3cc6e06b-cc6c-4a9f-97cc-04245547e383,
  abstract     = {Pretreatment of mixed softwoods with SO2 impregnation and steam for production of ethanol has been investigated. The optimal conditions, both for sugar yield and ethanol yield, to assess the effect of inhibitors formed in the pretreatment, have been determined. The parameters investigated were: SO2 concentration (1-6% (w/w) dry matter), temperature (190-230 degrees C) and residence time (2-15 min). After pretreatment, the material was separated into a solid residue and a filtrate. The solid residue was enzymatically hydrolysed with 2% dry matter (w/w). To investigate fermentability, the hydrolysed filtrate was fermented using Saccharomyces cerevisiae. The effects of the different parameters are described by response-surface modelling. The highest experimental sugar yield of 42.1 g per 100 g dry matter was obtained at 210 degrees C and 5.5 min residence time. Although the fermentabilities were good for all filtrates with yields greater than 90% of the yield obtained in a pure glucose reference solution, the pretreatment has a clear influence on the ethanol production rate. (C) 1998 SCI.},
  author       = {Stenberg, K and Tengborg, C and Galbe, Mats and Zacchi, Guido},
  issn         = {0268-2575},
  keyword      = {SO2,steam pretreatment,softwoods,ethanol,enzymatic hydrolysis,fermentation},
  language     = {eng},
  number       = {4},
  pages        = {299--308},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Chemical Technology and Biotechnology},
  title        = {Optimisation of steam pretreatment of SO2-impregnated mixed softwoods for ethanol production},
  url          = {http://dx.doi.org/10.1002/(SICI)1097-4660(199804)71:4<299::AID-JCTB858>3.0.CO;2-Z},
  volume       = {71},
  year         = {1998},
}