Potential for using thermophilic anaerobic bacteria for bioethanol production from hemicellulose

P. Sommer, Tania I. Georgieva, Birgitte Kiær Ahring

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    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 70-80degreesC 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.
    Original languageEnglish
    JournalBiochemical Society. Transactions
    Volume32
    Pages (from-to)283-289
    ISSN0300-5127
    DOIs
    Publication statusPublished - 2004

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