Optimization of Acid Hydrolysis of Sugarcane Bagasse and Investigations on its Fermentability for the Production of Xylitol by Candida guilliermondii
The dilute-acid hydrolysis of sugarcane bagasse was optimized using a statistical experimental design resulting in hydrolysates containing 57.25 g/L of xylose, which were fermented with a high inoculum concentration (10 g/L of the yeast Candida guilliermondii IM/UFRJ 50088). The addition of urea reduced the time of conversion (tC) to 75 h (without nitrogen source addition t C > 127 h), and, consequently, improving the rates of xylitol bioproduction. Fermentator experiments, using the optimized conditions, resulted in enhanced conversion rates, reducing t C to 30 h. The stability of the yeast in the hydrolysate was also verified in a 480-h cultivation.
Index EntriesSugarcane bagasse dilute-acid hydrolysis optimization sugarcane bagasse hydrolysate xylitol bioproduction
Unable to display preview. Download preview PDF.
- 3.Lee, J. (1997), J. Biothecnol. 56, 1–24.Google Scholar
- 4.Hÿvonen, L., Koivistoinen, P., and Voirol, F. (1982), Adv. Food Res. 28, 373–303.Google Scholar
- 5.Scheinin, A., Mäniken, K.K., and Ylitalo, K. (1975), Ada Odontol. Scand. 33, 383–412.Google Scholar
- 6.Ylikari, R. (1979) Adv. Food. Res. 25, 159–180.Google Scholar
- 11.Couto, M.A.P.G. (2002), DSc thesis, Post Graduate Program in Chemical and Biochemical Processes Technology, School of Chemistry, UFRJ, Rio de Janeiro, Brazil.Google Scholar
- 12.Aguiar, W.B., Jr., Faria, L.F.F., Couto, M.A.P.G., Araujo, O.Q.F., and Pereira N. Jr., (2002), Biochem. Eng. J. 3608, 1–11.Google Scholar
- 16.Messenguy, F. and Dubois, E. (2000), Food Technol. Biotechnol. 38, 277–285.Google Scholar