Influence of media composition on xylitol fermentation by Candida guiliiermondii using response surface methodology |
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| Authors: | I C Roberto S Sato I M de Mancilha ME S Taqueda |
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| Institution: | (1) Dep to of Biotechnology-FAENQUIL, 12600-000 Lorena, S.P., Brazil;(2) Faculty of Pharmaceutical Sciences Dep to of Chemical Engineering, USP-São Paulo, S.P., Brazil;(3) Dep to of Chemical Engineering, Polytechnic School, USP-São Paulo, S.P., Brazil;(4) Dep to of Food Engineering, UFV, Viçosa, M.G., Brazil |
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| Abstract: | Summary The bioconversion of xylose to xylitol by the yeast Candida guilliermondii FTI 20037 was evaluated under different nutritional conditions using rice straw hemicellulose hydrolysate. Statistical designs were used to determine the fermentation medium composition. Ammonium sulfate and rice bran have been identified as required nutrients in the hydrolysate since there was a significant interaction between them. In the presence of both nutrients, the xylitol yield factor (Yp/s) and volumetric productivities (Qp) were 0.68 g/g and 0.54 g/L.h, respectively. |
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