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Influence of Oxygen Availability on Cell Growth and Xylitol Production by Candida guilliermondii

  • Luis F. Figueiredo Faria
  • Maria Antonieta P. Gimenes
  • Ronaldo Nobrega
  • Nei PereiraJr.
Chapter
Part of the Applied Biochemistry and Biotechnology book series (ABAB)

Abstract

Oxygen availability is the most important environmental parameter in the production of xylitol by yeasts, directly affecting yields and volumetric productivity. This work evaluated the cell behavior in fermentations carried out with different dissolved oxygen concentrations (0.5–30.0% of saturation), as well as a limited oxygen restriction (0% of saturation), at several oxygen volumetric transfer coefficients (12 ≤k L a ≤ 70 h-1). These experiments allowed us to establish the specific oxygen uptake rate limits to ensure high yields and volumetric productivity. When oxygen availability was limited, the specific oxygen uptake rate values were between 12 and 26 mg of O2/ of g cell·h, resulting in a yield of 0.71 g of xylitol/xylose consumed, and 0.85 g/[L·h] for the volumetric productivity. According to the results, the effective control of the specific oxygen uptake rate makes it possible to establish complete control over this fermentative process, for both cell growth and xylitol production.

Index Entries

Xylitol xylose aeration Candida guilliermondii oxygen availability 

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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • Luis F. Figueiredo Faria
    • 1
  • Maria Antonieta P. Gimenes
    • 2
  • Ronaldo Nobrega
    • 2
  • Nei PereiraJr.
    • 1
  1. 1.Department of Chemical EngineeringFaculty of Chemical Engineering of Lorena/RodLorena-SPBrazil
  2. 2.COPPE and Department of Biochemical Eng.-EQFederal University of Rio de JaneiroBrazil

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