Direct Fermentation of d-Xylose to Ethanol by Kluyveromyces marxianus Strains

AUTOR(ES)

Margaritis, Argyrios

RESUMO

Eight strains of Kluyveromyces marxianus were screened, and all of them were found to ferment the aldopentose d-xylose directly to ethanol under aerobic conditions. One of these strains, K. marxianus SUB-80-S, was grown in a medium containing 20 g of d-xylose per liter, and the following results were obtained: maximum ethanol concentration, 5.6 g/liter; ethanol yield, 0.28 g of ethanol per g of d-xylose (55% of theoretical); maximum specific growth rate, 0.12 h−1; 100% d-xylose utilization was completed in 48 h.

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