A limited number of bacteria, yeast and fungi can convert hemicellulose or its monomers (xylose, arabinose, mannose and galactose) into ethanol with a satisfactory yield and productivity. In the present study we tested a number of thermophilic enrichment cultures, and new isolates of thermophilic anaerobic bacterial strains growing optimally at 70–80°C for their ethanol production from d-xylose. The new isolates came from different natural and man-made systems such as hot springs, paper pulp mills and brewery waste water. The test was composed of three different steps; (i) test for conversion of d-xylose into ethanol; (ii) test for viability and ethanol production in pretreated wheat straw hemicellulose hydrolysate; (iii) test for tolerance against high d-xylose concentrations. A total of 86 enrichment cultures and 58 pure cultures were tested and five candidates were selected which successfully fulfilled the criteria defined for the screening test.
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April 2004
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Conference Article|
April 01 2004
Potential for using thermophilic anaerobic bacteria for bioethanol production from hemicellulose
P. Sommer;
P. Sommer
1
Bio-Centrum, Technical University of Denmark, Building 227, DK-2800 Lyngby, Denmark
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T. Georgieva;
T. Georgieva
Bio-Centrum, Technical University of Denmark, Building 227, DK-2800 Lyngby, Denmark
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B.K. Ahring
B.K. Ahring
2
Bio-Centrum, Technical University of Denmark, Building 227, DK-2800 Lyngby, Denmark
2To whom correspondence should be addressed (e-mail bka@biocentrum.dtu.dk).
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Publisher: Portland Press Ltd
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2004 Biochemical Society
2004
Biochem Soc Trans (2004) 32 (2): 283–289.
Citation
P. Sommer, T. Georgieva, B.K. Ahring; Potential for using thermophilic anaerobic bacteria for bioethanol production from hemicellulose. Biochem Soc Trans 1 April 2004; 32 (2): 283–289. doi: https://doi.org/10.1042/bst0320283
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