Xylitol conversion by fermentation using five yeast strains and polyelectrolyte-assisted ultrafiltration |
| |
Authors: | Chun-Han Ko Pei-Chun Chiu Chin-Lin Yang Keng-Hao Chang |
| |
Institution: | (1) School of Forestry and Resource Conservation, National Taiwan University, Taipei, 106, Taiwan;(2) Bioenergy Research Center, National Taiwan University, Taipei, 106, Taiwan;(3) San Ying Enterprises Co., Ltd, Taipei, 100, Taiwan;(4) Analab Corporation, Taipei, 104, Taiwan |
| |
Abstract: | Batch fermentations for xylitol production were conducted using Candida boidinii (BCRC 21432), C. guilliermondii (BCRC 21549), C. tropicalis (BCRC 20520), C. utilis (BCRC 20334), and P. anomala (BCRC 21359) together with a mixture of sugars simulating lignocellulosic hydrolysates as the carbon source. C. tropicalis had the highest bioconversion yield (YP/S) of 0.79 g g−1 (g xylitol·g xylose−1) over 48 h. Additional fermentations with C. tropicalis achieved YP/S values of 0.6 and 0.39 g g−1 after 96 and 72 h using urea and soybean meal as the nitrogen sources, respectively. Ethanol and arabitol were also produced
in all fermentation. Xylitol in the fermentation broth was recovered by cross-flow ultrafiltration. With prior application
of 2 mg polydiallyl dimethylammonium chloride l−1 on the membrane surface, protein in the permeate was reduced from 7.1 to 1.5 mg l−1 after 2 h. |
| |
Keywords: | Candida tropicalis Low-cost fermentation media Ultrafiltration Xylitol |
本文献已被 PubMed SpringerLink 等数据库收录! |
|