Role of Glycerol Addition on Xylose-to-Xylitol Bioconversion by Candida guilliermondii


Autoria(s): ARRUDA, Priscila V.; FELIPE, Maria G. A.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2009

Resumo

The effect of glycerol on xylose-to-xylitol bioconversion by Candida guilliermondii was evaluated by its addition (0.7 and 6.5 g/l) to semidefined media (xylose as a substrate). The glycerol concentrations were chosen based on the amounts produced during previous studies on xylitol production by C. guilliermondii. Medium without glycerol addition (control) and medium containing glycerol (53 g/l) in substitution to xylose were also evaluated. According to the results, the addition of 0.7 g/l glycerol to the fermentation medium favored not only the yield (Y (P/S) = 0.78 g/g) but also the xylitol productivity (Q (P) = 1.13 g/l/h). During the xylose-to-xylitol bioconversion, the formation of byproducts (glycerol and ethanol) was observed for all conditions employed. In relation to the cellular growth, glycerol as the only carbon source for C. guilliermondii was better than xylose or xylose and glycerol mixtures, resulting in a maximum cellular concentration (5.34 g/l).

FAPESP

CAPES

CNPq

Identificador

CURRENT MICROBIOLOGY, v.58, n.3, p.274-278, 2009

0343-8651

http://producao.usp.br/handle/BDPI/17468

10.1007/s00284-008-9321-7

http://dx.doi.org/10.1007/s00284-008-9321-7

Idioma(s)

eng

Publicador

SPRINGER

Relação

Current Microbiology

Direitos

restrictedAccess

Copyright SPRINGER

Palavras-Chave #BAGASSE HEMICELLULOSIC HYDROLYSATE #HYDROLYZATE #ADAPTATION #AERATION #YEASTS #CELLS #PH #Microbiology
Tipo

article

original article

publishedVersion