Thermophilic fermentation of acetoin and 2,3-butanediol by a novel Geobacillus strain.

ABSTRACT:

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Background

Acetoin and 2,3-butanediol are two important biorefinery platform chemicals. They are currently fermented below 40°C using mesophilic strains, but the processes often suffer from bacterial contamination.

Results

This work reports the isolation and identification of a novel aerobic Geobacillus strain XT15 capable of producing both of these chemicals under elevated temperatures, thus reducing the risk of bacterial contamination. The optimum growth temperature was found to be between 45 and 55°C and the medium initial pH to be 8.0. In addition to glucose, galactose, mannitol, arabionose, and xylose were all acceptable substrates, enabling the potential use of cellulosic biomass as the feedstock. XT15 preferred organic nitrogen sources including cor

SUBMITTER: Xiao Z 

PROVIDER: S-EPMC3538569 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature