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

Paper ID Volume ID Publish Year Pages File Format Full-Text
35986 45117 2007 6 PDF Available
Title
A comparison between simultaneous saccharification and fermentation and separate hydrolysis and fermentation using steam-pretreated corn stover
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.

Keywords
Steam pretreatment; SSF; SHF; Ethanol production; SO2; Corn stover; Ethanol concentration
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A comparison between simultaneous saccharification and fermentation and separate hydrolysis and fermentation using steam-pretreated corn stover
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 5, May 2007, Pages 834–839
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us