Advanced

A comparison between simultaneous saccharification and fermentation and separate hydrolysis and fermentation using steam-pretreated corn stover

Öhgren, Karin LU ; Bura, Renata; Lesnicki, Gary; Saddler, Jack and Zacchi, Guido LU (2007) In Process Biochemistry 42(5). p.834-839
Abstract
Two different process configurations, simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF), were compared, at 8% water-insoluble solids (WIS), regarding ethanol production from steam-pretreated corn stover. The enzymatic loading in these experiments was 10 FPU/g WIS and the yeast concentration in SSF was 1 g/L (dry weight) of a Saccharomyces cerevisiae strain. When the whole slurry from the pretreatment stage was used as it was, diluted to 8% WIS with water and pH adjusted, SSF gave a 13% higher overall ethanol yield than SHF (72.4% versus 59.1% of the theoretical). The impact of the inhibitory compounds in the liquid fraction of the pretreated slurry was shown to affect SSF and SHF in... (More)
Two different process configurations, simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF), were compared, at 8% water-insoluble solids (WIS), regarding ethanol production from steam-pretreated corn stover. The enzymatic loading in these experiments was 10 FPU/g WIS and the yeast concentration in SSF was 1 g/L (dry weight) of a Saccharomyces cerevisiae strain. When the whole slurry from the pretreatment stage was used as it was, diluted to 8% WIS with water and pH adjusted, SSF gave a 13% higher overall ethanol yield than SHF (72.4% versus 59.1% of the theoretical). The impact of the inhibitory compounds in the liquid fraction of the pretreated slurry was shown to affect SSF and SHF in different ways. The overall ethanol yield (based on the untreated raw material) decreased when SSF was run in absence on inhibitors compared to SSF with inhibitors present. On the contrary, the presence of inhibitors decreased the overall ethanol yield in the case of SHF. However, the SHF yield achieves in the absence of inhibitors was still lower than the SSF yield achieves with inhibitors present. (C) 2007 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ethanol production, SHF, steam pretreatment, SSF, SO2, corn stover, ethanol concentration
in
Process Biochemistry
volume
42
issue
5
pages
834 - 839
publisher
Elsevier
external identifiers
  • wos:000246347500011
  • scopus:34047173711
ISSN
1873-3298
DOI
10.1016/j.procbio.2007.02.003
language
English
LU publication?
yes
id
d31bb569-f1a0-4e82-949c-df61c5ee2068 (old id 659833)
date added to LUP
2007-12-19 09:45:29
date last changed
2017-11-12 03:28:10
@article{d31bb569-f1a0-4e82-949c-df61c5ee2068,
  abstract     = {Two different process configurations, simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF), were compared, at 8% water-insoluble solids (WIS), regarding ethanol production from steam-pretreated corn stover. The enzymatic loading in these experiments was 10 FPU/g WIS and the yeast concentration in SSF was 1 g/L (dry weight) of a Saccharomyces cerevisiae strain. When the whole slurry from the pretreatment stage was used as it was, diluted to 8% WIS with water and pH adjusted, SSF gave a 13% higher overall ethanol yield than SHF (72.4% versus 59.1% of the theoretical). The impact of the inhibitory compounds in the liquid fraction of the pretreated slurry was shown to affect SSF and SHF in different ways. The overall ethanol yield (based on the untreated raw material) decreased when SSF was run in absence on inhibitors compared to SSF with inhibitors present. On the contrary, the presence of inhibitors decreased the overall ethanol yield in the case of SHF. However, the SHF yield achieves in the absence of inhibitors was still lower than the SSF yield achieves with inhibitors present. (C) 2007 Elsevier Ltd. All rights reserved.},
  author       = {Öhgren, Karin and Bura, Renata and Lesnicki, Gary and Saddler, Jack and Zacchi, Guido},
  issn         = {1873-3298},
  keyword      = {ethanol production,SHF,steam pretreatment,SSF,SO2,corn stover,ethanol concentration},
  language     = {eng},
  number       = {5},
  pages        = {834--839},
  publisher    = {Elsevier},
  series       = {Process Biochemistry},
  title        = {A comparison between simultaneous saccharification and fermentation and separate hydrolysis and fermentation using steam-pretreated corn stover},
  url          = {http://dx.doi.org/10.1016/j.procbio.2007.02.003},
  volume       = {42},
  year         = {2007},
}