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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sugarcane straw as a feedstock for xylitol production by Candida guilliermondii FTI 20037

Full text
Author(s):
Hernandez-Perez, Andres Felipe [1] ; de Arruda, Priscila Vaz [1] ; de Almeida Felipe, Maria das Gracas [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Dept Biotecnol, Escola Engn Lorena, Lorena, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Brazilian Journal of Microbiology; v. 47, n. 2, p. 489-496, APR-JUN 2016.
Web of Science Citations: 12
Abstract

Abstract Sugarcane straw has become an available lignocellulosic biomass since the progressive introduction of the non-burning harvest in Brazil. Besides keeping this biomass in the field, it can be used as a feedstock in thermochemical or biochemical conversion processes. This makes feasible its incorporation in a biorefinery, whose economic profitability could be supported by integrated production of low-value biofuels and high-value chemicals, e.g., xylitol, which has important industrial and clinical applications. Herein, biotechnological production of xylitol is presented as a possible route for the valorization of sugarcane straw and its incorporation in a biorefinery. Nutritional supplementation of the sugarcane straw hemicellulosic hydrolyzate as a function of initial oxygen availability was studied in batch fermentation of Candida guilliermondii FTI 20037. The nutritional supplementation conditions evaluated were: no supplementation; supplementation with (NH4)2SO4, and full supplementation with (NH4)2SO4, rice bran extract and CaCl2·2H2O. Experiments were performed at pH 5.5, 30 °C, 200 rpm, for 48 h in 125 mL Erlenmeyer flasks containing either 25 or 50 mL of medium in order to vary initial oxygen availability. Without supplementation, complete consumption of glucose and partial consumption of xylose were observed. In this condition the maximum xylitol yield (0.67 g g-1) was obtained under reduced initial oxygen availability. Nutritional supplementation increased xylose consumption and xylitol production by up to 200% and 240%, respectively. The maximum xylitol volumetric productivity (0.34 g L-1 h-1) was reached at full supplementation and increased initial oxygen availability. The results demonstrated a combined effect of nutritional supplementation and initial oxygen availability on xylitol production from sugarcane straw hemicellulosic hydrolyzate. (AU)

FAPESP's process: 13/27142-0 - Development of technology platform for incorporation of sugarcane straw in a biorefinery: xylitol and energy production
Grantee:Maria das Graças de Almeida Felipe
Support Opportunities: Regular Research Grants