Xylitol production from lignocellulosic pentosans using Kluyveromyces marxianus: kinetic modelling of yeast growth and fermentation

ABSTRACT

Kinetics of xylitol production from sugarcane bagasse hydrolysate by Kluyveromyces marxianus IIPE453t was modelled. Yeast growth and xylitol production were represented with logistic and Michaelis–Menten equations. Batch fermentation produced xylitol with varying yields at different xylose concentrations. The maximum xylitol titre of 25.6 g L⁻¹ was obtained with a volumetric productivity of 0.24 g L⁻¹ h⁻¹. Sensitivity analysis demonstrated that xylose bioconversion linked to XR_KS activity was the principal factor governing xylitol production kinetics.

KEYWORDS:

• Sugarcane bagasse
• xylitol
• Kluyveromyces marxianus
• logistic model
• Michaelis–Menten kinetics

Acknowledgements

The authors thankfully acknowledge Dr. Anjan Ray, Director CSIR-IIP, and Head, Bio Fuels Division, for their constant motivation and support to this study, and for facilitating necessary infrastructure. CSIR is also acknowledged for providing necessary funding through 12 Five Year Plan Project No. CSC-0106/4. The authors are also grateful to Mr. Deepchand for the technical support extended during the experimental studies.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This study was funded by Council of Scientific and Industrial Research (CSIR, India) [grant number CSC 0106/4].