Xylitol Production from Eucalyptus Wood Hydrolysates in Low-Cost Fermentation Media

José Diz, José M. Cruz*, Herminia Domínguez and Juan C. Parajó

Department of Chemical Engineering, University of Vigo (Campus Ourense), Faculty of Science, Polytechnical Building, As Lagoas, E-32004 Ourense, Spain

Article history:

Received: December 20, 2002
Accepted: June 18, 2002

Key words:

autohydrolysis, Debaryomyces hansenii, Eucalyptus wood, low-cost fermentation media, posthydrolysis, prehydrolysis, xylitol


Several aspects concerning the bioconversion of xylose-containing hydrolysates (obtained from Eucalyptus wood) into xylitol were assessed. Debaryomyces hansenii yeast strains were adapted to fermentation media (obtained either by prehydrolysis or autohydrolysis- posthydrolysis of wood) supplemented with low-cost nutrients. Media containing up to 80 g/L xylose were efficiently fermented when the hydrolysates were detoxified by charcoal adsorption and supplemented with corn steep liquor.

*Corresponding author:

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