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Direct ethanol production from N-acetylglucosamine and chitin substrates by Mucor species

Paper ID Volume ID Publish Year Pages File Format Full-Text
3363 166 2013 9 PDF Available
Title
Direct ethanol production from N-acetylglucosamine and chitin substrates by Mucor species
Abstract

Chitin, which is a polymer of β-(1–4) linked N-acetyl-d-glucosamine (GlcNAc) residues, is one of the most abundant renewable resources in nature, after cellulose. In this study, we found some native Mucor strains, which can use GlcNAc and chitin substrates as carbon sources for growth and ethanol production. One of these strains, M. circinelloides NBRC 6746 produced 18.6 ± 0.6 g/l of ethanol from 50 g/l of GlcNAc after 72 h and the maximum ethanol production rate was 0.75 ± 0.1 g/l/h. Furthermore, M. circinelloides NBRC 4572 produced 6.00 ± 0.22 and 0.46 ± 0.04 g/l of ethanol from 50 g/l of colloidal chitin and chitin powder after 16 and 12 days, respectively. We also found an extracellular chitinolytic enzyme producing strain M. ambiguus NBRC 8092, and successfully improved ethanol productivity of NBRC 4572 from colloidal chitin using crude chitinolytic enzyme derived from NBRC 8092. The ethanol titer reached 9.44 ± 0.10 g/l after 16 days. These results were the first bioethanol production from GlcNAc and chitin substrates by native organisms, and also suggest that these Mucor strains have great potential for the simultaneous saccharification and fermentation (SSF) of chitin biomass.

► We evaluate ethanol production capacity of Mucor strains from GlcNAc and chitin. ► Wide variety of Mucor strains produce ethanol from GlcNAc efficiently. ► Some Mucor strains directly convert colloidal chitin into ethanol.

Keywords
Ethanol; N-acetylglucosamine; Chitin; Bioconversion; Biodegradation; Fermentation
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Direct ethanol production from N-acetylglucosamine and chitin substrates by Mucor species
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 72, 15 March 2013, Pages 24–32
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