Monday, May 4, 2009
12-23
Alkaline hydrogen peroxide pretreatment of sugarcane bagasse for enzymatic hydrolysis: the influence of temperature and pretreatment time on delignification and sugars yield
Daniella R. Garcia Jr., Sarita C. Rabelo, Laura L. G. Fuentes, Rubens Maciel Filho, and Aline C. Costa. Department of Chemical Process, State University of Campinas - School of Chemical Engineering, P.O. Box 6066, 13083-970, Campinas-SP, Brazil, Campinas, Brazil
The raw material used in this research was sugarcane bagasse, which has great potential to produce ethanol fuel and other products. In this work, pretreatment of sugarcane bagasse with alkaline hydrogen peroxide and the subsequent enzymatic hydrolysis performance were addressed. Starting from an optimization performed for sugarcane bagasse from a different source and with different granulometry from the bagasse used in this work, the best conditions of temperature, pretreatment time and hydrogen peroxide concentration to maximize glucose yield were defined. The hydrolysis yield and the composition of the two different bagasses before and after pretreatment were compared. After the best pretreatment conditions have been defined, kinetic data of the pretreatment were obtained for different temperatures (25, 45 and 65°C) as a function of time, with analysis of the contents of lignin, cellulose and hemicellulose. The content of lignin was lower at 65°C , however, at this temperature, there is loss of cellulose and hemicellulose.