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Evaluation of Ion Exchange Resins for Removal of Inhibitory Compounds from Corn Stover Hydrolyzate for Xylitol Fermentation
Author(s) -
de Mancilha Ismael Maciel,
Karim M. Nazmul
Publication year - 2003
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp034069x
Subject(s) - xylitol , corn stover , chemistry , furfural , xylose , hemicellulose , ion exchange resin , hydrolysis , fermentation , hydrolysate , acetic acid , sugar , food science , chromatography , organic chemistry , catalysis
Abstract The use of dilute acids to catalyze the hydrolysis of hemicellulose to its sugar constituents is well‐known and effective. However, a major problem associated with this pretreatment is the poor fermentability of the produced hydrolyzate as a result of the presence of the microorganismapos;s inhibitory compounds. In the present work, seven ion‐exchange resins were tested in order to detoxify corn stover hydrolyzate. Regarding xylose recovery, it was observed that more than 92% recovery was feasible. Furfural removal varied from 53.% to 99.%, and hydroxymethylfurfural (HMF) removal was effective between 37% and 100%. Acetic acid was totally removed by Purolite A 103 S resin. Corn stover hydrolyzate (CSH) treated with Purolite A 103 S, and Finex CS 14 GC resins, was tested as substrate for xylitol production using a yeast, Candida mogii . Product yields, Yp/s, of 0.41 and 0.37 g/g and cellular yields, Yx/s, of 0.24 and 0.13 g/g, respectively, were obtained using the two types of resin‐treated hydrolyzates.