The use of steamed hemicellulose as substrate in microbial conversions

  • Johanna Büchert
  • Jürgen Puls
  • Kaisa Poutanen
Scientific Note Session 2 Applied Biological Research


The suitability of acid- and enzymatically hydrolyzed birch hemicellulose as biotechnical raw material was studied usingCluconobacter oxydans, Fusarium oxysporum, andCandida utilis for production of xylonic acid, ethanol, and SCP, respectively. The fermentabilities of both hydrolyzates were rather similar and inhibition was evident in all cases at xylose concentrations of 257–30 g/L and higher. Potential identified fermentation inhibitors were the lignin-derived compounds sinapyl alcohol, coniferyl alcohol, vanillin, and syringaldehyde and the sugar degradation products furfural and 5-hydroxymethyl furfural.

Index Entries

Hemicellulose hydrolyzate Gluconobacter oxydans Candida utilis Fusarium oxysporum fermentation inhibitors 


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Copyright information

© Humana Press Inc. 1989

Authors and Affiliations

  • Johanna Büchert
    • 1
  • Jürgen Puls
    • 2
  • Kaisa Poutanen
    • 1
  1. 1.VTT Biotechnical LaboratoryEspooFinland
  2. 2.Institute of Wood Chemistry and Chemical Technology of WoodFederal Research Centre for Forestry and Forest ProductsHamburg 80Federal Republic of Germany

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