Single-cell Protein and Xylitol Production by a Novel Yeast Strain Candida intermedia FL023 from Lignocellulosic Hydrolysates and Xylose.

ABSTRACT: Yeasts are good candidates to utilize the hydrolysates of lignocellulose, the most abundant bioresource, for bioproducts. This study aimed to evaluate the efficiencies of single-cell protein (SCP) and xylitol production by a novel yeast strain, Candida intermedia FL023, from lignocellulosic hydrolysates and xylose. This strain efficiently assimilated hexose, pentose, and cellubiose for cell mass production with the crude protein content of 484.2 g kg-1 dry cell mass. SCP was produced by strain FL023 using corncob hydrolysate and urea as the carbon and nitrogen sources with the dry cell mass productivity 0.86 g L-1 h-1 and the yield of 0.40 g g-1 sugar. SCP was also produced using NaOH-pretreated Miscanthus sinensis straw and corn steep liquor as the carbon and nitrogen sources through simultaneous saccharification and fermentation with the dry cell productivity of 0.23 g L-1 h-1 and yield of 0.17 g g-1 straw. C. intermedia FL023 was tolerant to 0.5 g L-1 furfural, acetic acid, and syringaldehyde in xylitol fermentation and produced 45.7 g L-1 xylitol from xylose with the productivity of 0.38 g L-1 h-1 and the yield of 0.57 g g-1 xylose. This study provides feasible methods for feed and food additive production from the abundant lignocellulosic bioresources.

SUBMITTER: Wu J 

PROVIDER: S-EPMC5937888 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature