Xylitol production by Debaryomyces hansenii in brewery spent grain dilute-acid hydrolysate: effect of supplementation
2007
Carvalheiro, Florbela | Duarte, Luís C | Medeiros, Raquel | Gírio, Francisco M
A brewery spent-grain hemicellulosic hydrolysate was used for xylitol production by Debaryomyces hansenii. Addition of 6 g yeast extract/l increased the xylitol yield to 0.57 g/g, and productivity to 0.51 g/l h that were, respectively, 1.4 -and 1.8-times higher than the values obtained with non-supplemented hydrolysate. When corn steep liquor was combined with 3 g yeast extract/l, the highest xylitol yield, 0.58 g/g, was obtained with a similar productivity.
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