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Production of butyric acid by a cellulolytic actinobacterium Thermobifida fusca on cellulose

Paper ID Volume ID Publish Year Pages File Format Full-Text
3013 147 2014 6 PDF Available
Title
Production of butyric acid by a cellulolytic actinobacterium Thermobifida fusca on cellulose
Abstract

•T. fusca was found to produce butyric acid directly from lignocellulosic biomass.•The best the yield of butyric acid was 0.52 g/g C.•The maximum titer of 2.1 g/L butyric acid was achieved on 9.66 g/L of cellulose.•There was 2.37 g/L butyric acid produced under optimal conditions.•The pathway of producing butyric acid was identified experimentally.

Thermobifida fusca not only produces cellulases, hemicellulases and xylanases, but also excretes butyric acid. In order to achieve a high yield of butyric acid, the effect of different carbon sources: mannose, xylose, lactose, cellobiose, glucose, sucrose and acetates, on butyric acid production was studied. The highest yield of butyric acid was 0.67 g/g C (g-butyric acid/g-carbon input) on cellobiose. The best stir speed and aeration rate for butyric acid production were found to be 400 rpm and 2 vvm in a 5-L fermentor. The maximum titer of 2.1 g/L butyric acid was achieved on 9.66 g/L cellulose. In order to test the production of butyric acid on lignocellulosic biomass, corn stover was used as the substrate, on which there was 2.37 g/L butyric acid produced under the optimized conditions. In addition, butyric acid synthesis pathway was identified involving five genes that catalyzed reactions from acetyl-CoA to butanoyl-CoA in T. fusca.

Keywords
Fermentation; Batch processing; Cellulase; Cellulose; Butyric acid
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Production of butyric acid by a cellulolytic actinobacterium Thermobifida fusca on cellulose
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 90, 15 September 2014, Pages 239–244
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