Applied Biochemistry and Biotechnology

, Volume 82, Issue 2, pp 141–151

Xylitol production from hardwood hemicellulose hydrolysates by Pachysolen tannophilus, Debaryomyces hansenii, and Candida guilliermondii

  • Attilio Converti
  • Patrizia Perego
  • José Manuel Domínguez
Article

DOI: 10.1385/ABAB:82:2:141

Cite this article as:
Converti, A., Perego, P. & Domínguez, J.M. Appl Biochem Biotechnol (1999) 82: 141. doi:10.1385/ABAB:82:2:141

Abstract

Three different yeasts, Pachysolen tannophilus, Debaryomyces hansenii, and Candida guilliermondii, were evaluated to ferment xylose solutions prepared from hardwood hemicellulose hydrolysates, among which P. tannophilus proved to be the most promising microorganism. However, the presence of both lignin-derived compounds (LDC) and acetic acid rendered a poor fermentation. To enhance the fermentation kinetics, different treatments to purify the hydrolysates were studied, including overliming, charcoal adsorption for LDC removal, and evaporation for acetic acid and furfural stripping. Under the best operating conditions assayed, 39.5g/L of xylitol were achieved after 96 h of fermentation, which corresponds to a volumetric productivity of 0.41 g/L·h and a yield of product on consumed substrate of 0.63 gp/gS.

Index Entries

Xylitol hemicellulose hydrolysate Debaryomyces hansenii Candida guilliermondii Pachysolen tannophilus 

Copyright information

© Humana Press Inc. 1999

Authors and Affiliations

  • Attilio Converti
    • 1
  • Patrizia Perego
    • 1
  • José Manuel Domínguez
    • 2
  1. 1.Department of Chemical and Process Engineering G.B. BoninoUniversity of GenoaGenoaItaly
  2. 2.Department of Chemical EngineeringUniversity of Vigo (Campus Ourense)OurenseSpain