The Influence of Sugar Cane Bagasse Type and Its Particle Size on Xylose Production and Xylose-to-Xylitol Bioconversion with the Yeast Debaryomyces hansenii.
In the present study, the effect of the type of sugar cane bagasse (non-depithed or depithed) and its particle size on the production of xylose and its subsequent fermentation to xylitol by Debaryomyces hansenii CBS767 was investigated using a full factorial experimental design. It was found that the particle size range and whether bagasse was depithed or not had a significant effect on the concentration and yield of xylose in the resulting hemicellulose hydrolysate. Depithed bagasse resulted in higher xylose concentrations compared to non-depithed bagasse. The corresponding detoxified hemicellulose hydrolysates were used as fermentation media for the production of xylitol. The hemicellulose hydrolysate prepared from depithed bagasse also yielded meaningfully higher xylitol fermentation rates compared to non-depithed bagasse. However, in the case of non-depithed bagasse, the hemicellulose hydrolysate prepared from larger particle size range resulted in higher xylitol fermentation rates, whereas the effect in the case of non-depithed bagasse was not pronounced. Therefore, depithing of bagasse is an advantageous pretreatment when it is to be employed in bioconversion processes.
Department of Chemical Engineering, Amirkabir University of Technology, No 424, Hafez Avenue, Tehran, Iran. karimi.razieh@gmail.com.|Department of Molecular Microbiology and Genetics, University of Göttingen, Grisebachstr. 8, 37077, Göttingen, Germany. karimi.razieh@gmail.com.
Razieh Karimi
RK
Aghcheh
Department of Chemical Engineering, Amirkabir University of Technology, No 424, Hafez Avenue, Tehran, Iran.
Babak
B
Bonakdarpour
Department of Chemical Engineering, Amirkabir University of Technology, No 424, Hafez Avenue, Tehran, Iran.
Farzin Zokaee
FZ
Ashtiani
D002482:Cellulose / Q000737:chemistry* / Q000494:pharmacology*; D005285:Fermentation / Q000187:drug effects; D006868:Hydrolysis; D010316:Particle Size; D004718:Saccharomycetales / Q000187:drug effects / Q000378:metabolism*; D031786:Saccharum / Q000737:chemistry*; D014993:Xylitol / Q000096:biosynthesis*; D014994:Xylose / Q000096:biosynthesis*
D002482:Cellulose; C027433:bagasse; D014994:Xylose; D014993:Xylitol
Depithing; Particle size; Sugar cane bagasse; Xylitol; Xylose fermentation