Simultaneous saccharification and co-fermentation (SSCF) of AFEXTM pretreated corn stover for ethanol production using commercial enzymes and Saccharomyces cerevisiae 424A(LNH-ST)
In: Bioresource Technology, Jg. 110 (2012-04-01), S. 587-594
Online
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Zugriff:
Xylose consumption by Saccharomyces cerevisiae 424A(LNH-ST) during simultaneous saccharification and co-fermentation (SSCF) of AFEXTM pretreated switchgrass was inhibited by unhydrolyzed solids. Such inhibitory effects were not found in unhydrolyzed solids from AFEXTM pretreated corn stover (AFEXTM-CS). However, the xylose consumption was still unsatisfactory during 6 h pre-hydrolysis SSCF. By extending the pre-hydrolysis time to 24 h or longer, the xylose consumption was improved significantly. In order to better understand the reasons for such improvement, the hydrolysate slurries after 6 h pre-hydrolysis and 24 h pre-hydrolysis were studied and compared. We found that the glucose concentration after pre-hydrolysis was the critical factor that determined cell viability and hence xylose consumption during SSCF. Low temperature (30 °C) and ethanol inhibition were shown to be the factors limiting hydrolysis rate and hence productivity during SSCF.
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Simultaneous saccharification and co-fermentation (SSCF) of AFEXTM pretreated corn stover for ethanol production using commercial enzymes and Saccharomyces cerevisiae 424A(LNH-ST)
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Autor/in / Beteiligte Person: | Jin, Mingjie ; Ming Woei Lau ; Dale, Bruce E. ; Gunawan, Christa ; Balan, Venkatesh |
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Zeitschrift: | Bioresource Technology, Jg. 110 (2012-04-01), S. 587-594 |
Veröffentlichung: | Elsevier BV, 2012 |
Medientyp: | unknown |
ISSN: | 0960-8524 (print) |
DOI: | 10.1016/j.biortech.2012.01.150 |
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