Journal
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
Volume 37, Issue 5, Pages 495-501Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10295-010-0695-8
Keywords
Wheat bran; Dilute sulfuric acid pretreatment; Butanol; Clostridium beijerinckii ATCC 55025
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Funding
- Key Technologies R & D Program of Shandong Province [2007GG2QT07006]
- National Science Foundation of China [30970049]
- Shandong Province Soft Science Program [2009RKB161]
- State Key Laboratory of Microbial Technology of Shandong University
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Wheat bran, a by-product of the wheat milling industry, consists mainly of hemicellulose, starch and protein. In this study, the hydrolysate of wheat bran pretreated with dilute sulfuric acid was used as a substrate to produce ABE (acetone, butanol and ethanol) using Clostridium beijerinckii ATCC 55025. The wheat bran hydrolysate contained 53.1 g/l total reducing sugars, including 21.3 g/l of glucose, 17.4 g/l of xylose and 10.6 g/l of arabinose. C. beijerinckii ATCC 55025 can utilize hexose and pentose simultaneously in the hydrolysate to produce ABE. After 72 h of fermentation, the total ABE in the system was 11.8 g/l, of which acetone, butanol and ethanol were 2.2, 8.8 and 0.8 g/l, respectively. The fermentation resulted in an ABE yield of 0.32 and productivity of 0.16 g l(-1) h(-1). This study suggests that wheat bran can be a potential renewable resource for ABE fermentation.
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