TY - JOUR
T1 - Fermentation performance of Candida guilliermondii for xylitol production on single and mixed substrate media
AU - Mussatto, Solange I.
AU - J. S. M. Silva, Carla
AU - Conceicao Roberto, Inês
PY - 2006
Y1 - 2006
N2 - Semidefined media fermentation simulating the sugar composition of hemicellulosic hydrolysates (around 85 g l-1 xylose, 17 g l-1 glucose, and 9 g l-1 arabinose) was investigated to evaluate the glucose and arabinose influence on xylose-to-xylitol bioconversion by Candida guilliermondii. The results revealed that glucose reduced the xylose consumption rate by 30%. Arabinose did not affect the xylose consumption but its utilization by the yeast was fully repressed by both glucose and xylose sugars. Arabinose was only consumed when it was used as a single carbon source. Xylitol production was best when glucose was not present in the fermentation medium. On the other hand, the arabinose favored the xylitol yield (which attained 0.74 g g-1 xylose consumed) and it did not interfere with xylitol volumetric productivity (QP=0.85 g g-1), the value of which was similar to that obtained with xylose alone.
AB - Semidefined media fermentation simulating the sugar composition of hemicellulosic hydrolysates (around 85 g l-1 xylose, 17 g l-1 glucose, and 9 g l-1 arabinose) was investigated to evaluate the glucose and arabinose influence on xylose-to-xylitol bioconversion by Candida guilliermondii. The results revealed that glucose reduced the xylose consumption rate by 30%. Arabinose did not affect the xylose consumption but its utilization by the yeast was fully repressed by both glucose and xylose sugars. Arabinose was only consumed when it was used as a single carbon source. Xylitol production was best when glucose was not present in the fermentation medium. On the other hand, the arabinose favored the xylitol yield (which attained 0.74 g g-1 xylose consumed) and it did not interfere with xylitol volumetric productivity (QP=0.85 g g-1), the value of which was similar to that obtained with xylose alone.
U2 - 10.1007/s00253-006-0372-z
DO - 10.1007/s00253-006-0372-z
M3 - Journal article
VL - 72
SP - 681
EP - 686
JO - Applied Microbiology and Biotechnology
JF - Applied Microbiology and Biotechnology
SN - 0175-7598
IS - 4
ER -