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High acetoin production by a newly isolated marine Bacillus subtilis strain with low requirement of oxygen supply

Paper ID Volume ID Publish Year Pages File Format Full-Text
34271 45016 2015 5 PDF Available
Title
High acetoin production by a newly isolated marine Bacillus subtilis strain with low requirement of oxygen supply
Abstract

•A new Bacillus subtilis strain from sea sediment was isolated.•The strain demonstrated low oxygen requirement and high sugar tolerance.•61.15 g/l acetoin was obtained from sugarcane molasses by batch fermentation.•76.0 g/l acetoin was obtained from glucose by batch fermentation.

Acetoin is a natural flavor and mainly used as a food additive and important intermediate to synthesize novel optically active compounds. In this work a new acetoin producer, Bacillus subtilis DL01 was isolated from samples of sea sediment, and its growth properties and acetoin productivity were explored. The experiments showed that the new strain can grow well in a simple fermentation medium only containing sugarcane molasses, (NH4)2HPO4 and MnSO4. When the initial concentration of sugar was 200 g/l in molasses, 61.15 g/l acetoin (58.2 g/l d-acetoin) was obtained with a productivity of 0.807 g/(l h) by a batch fermentation under stage-enhanced agitation and constant aeration of 0.4 vvm. By contrast, 76 g/l acetoin (60.9 g/l d-acetoin) could be obtained with a productivity of 1.00 g/(l h) and a yield of 0.421 g/g if 210 g/l glucose was used. The strain DL01 demonstrated high sugar tolerance, high acetoin production, and low oxygen requirement.

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Keywords
Acetoin; Marine bacteria; Optical purity; Oxygen supply
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High acetoin production by a newly isolated marine Bacillus subtilis strain with low requirement of oxygen supply
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 50, Issue 11, November 2015, Pages 1730–1734
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