Journals / Turkish Journal of Engineering and Environmental Sciences / 1999 / Cilt: 23 - Sayı: 6
Fermentative Performance of Candida tropicalis Kuen 1022 Yeast For D-Xylose and Sunflower Seed Hull Hydrolysate in Xylitol Production
- Pages
- 433–438
- DOI
- —
Abstract
The fermentative ability of Candida tropicalis Kuen 1022 yeast to produce xylitol from D-xylose and sunflower seed hull hydrolyste was examined under aerobic conditions. In batch cultures having a synthetic xylose concentrations ranging from 50 gl-1 to 100 gl-1,the maximum xylitol yield achieved was 0.26 g/g xylose consumed with a volumetric rate of xylitol production of 0.196 gl-1h-1 when the initial synthetic sugar concentration was 50 gl-1. The pretreated sunflower seed hull hydrolysate was cultivated with the previously hydrolysate medium adapted yeast cells. The maximum xylitol concentration was 4.72 gl-1, the fermentation time was 96 h, xylitol yield was 0.113 g/g xylose consumed and volumetric productivity was 0.219 gl-1h-1 for hydrolysate having an initial composition of xylose 66 gl-1 and glucose 0.8 gl-1
Özet
The fermentative ability of Candida tropicalis Kuen 1022 yeast to produce xylitol from D-xylose and sunflower seed hull hydrolyste was examined under aerobic conditions. In batch cultures having a synthetic xylose concentrations ranging from 50 gl-1 to 100 gl-1,the maximum xylitol yield achieved was 0.26 g/g xylose consumed with a volumetric rate of xylitol production of 0.196 gl-1h-1 when the initial synthetic sugar concentration was 50 gl-1. The pretreated sunflower seed hull hydrolysate was cultivated with the previously hydrolysate medium adapted yeast cells. The maximum xylitol concentration was 4.72 gl-1, the fermentation time was 96 h, xylitol yield was 0.113 g/g xylose consumed and volumetric productivity was 0.219 gl-1h-1 for hydrolysate having an initial composition of xylose 66 gl-1 and glucose 0.8 gl-1