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Effect of hydrothermolysis process conditions on pretreated switchgrass composition and ethanol yield by SSF with Kluyveromyces marxianus IMB4

Paper ID Volume ID Publish Year Pages File Format Full-Text
35438 45090 2009 6 PDF Available
Title
Effect of hydrothermolysis process conditions on pretreated switchgrass composition and ethanol yield by SSF with Kluyveromyces marxianus IMB4
Abstract

Hot compressed liquid water was used to treat switchgrass in a method called hydrothermolysis to disrupt lignin, dissolve hemicellulose, and increase accessibility of cellulose to cellulase. Three temperatures (190, 200, and 210 °C) and hold times (10, 15, and 20 min) were tested. Switchgrass treated at 190 °C for 10 min had the greatest xylan recovery in the prehydrolyzate. Less than 0.65 g/L glucose were released into the prehydrolyzate for all pretreatment conditions, indicating most glucose was retained as cellulose in the solid substrate. 5-Hydroxymethylfurfural (HMF) and furfural formation in the prehydrolyzate were found to be less than 1 g/L for all treatments. The highest concentration of ethanol, 16.8 g/L (72% of theoretical), was produced from switchgrass pretreated at 210 °C and 15 min using simultaneous saccharification and fermentation (SSF) at 45 °C with the thermotolerant yeast Kluyveromyces marxianus IMB4 and 15 FPU cellulase/g glucan.

Keywords
Biofuels; Renewable energy; Pretreatment; Thermotolerant
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Effect of hydrothermolysis process conditions on pretreated switchgrass composition and ethanol yield by SSF with Kluyveromyces marxianus IMB4
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 44, Issue 5, May 2009, Pages 540–545
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