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Fungal metabolism of fermentation inhibitors present in corn stover dilute acid hydrolysate ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
17789 42695 2008 7 PDF Available
Title
Fungal metabolism of fermentation inhibitors present in corn stover dilute acid hydrolysate ☆
Abstract

Use of agricultural residues for ethanol production requires pretreatment of the material to facilitate release of sugars. Physical–chemical pretreatment of lignocellulosic biomass can, however, give rise to side-products that may be toxic to fermenting microorganisms and hinder utilization of sugars obtained from biomass. Potentially problematic compounds include furan aldehydes formed by degradation of sugars, organic acids released from hemicellulose side-groups, and aldehydes and phenolics released from lignin. A fungal isolate, Coniochaeta ligniaria NRRL30616, metabolizes furfural and 5-hydroxymethylfurfural (HMF) as well as aromatic and aliphatic acids and aldehydes. NRRL30616 grew in corn stover dilute-acid hydrolysate, and converted furfural to both furfuryl alcohol and furoic acid. Hydrolysate was inoculated with NRRL30616, and the fate of pretreatment side-products was followed in a time-course study. A number of aromatic and aliphatic acids, aldehydes, and phenolic compounds were quantitated by analytical extraction of corn stover hydrolysate, followed by HPLC–UV–MS/MS analysis. Compounds representing all of the classes of inhibitory side-products were removed during the course of fungal growth. Biological abatement of hydrolysates using C. ligniaria improved xylose utilization in subsequent ethanol fermentations.

Keywords
Lignocellulose; Biomass; Detoxification; Fermentation inhibitors; Furan metabolism
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Fungal metabolism of fermentation inhibitors present in corn stover dilute acid hydrolysate ☆
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 42, Issue 7, 5 June 2008, Pages 624–630
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