초록
This study presents the influence of different dual salts on the pretreatment of sugarcane bagasse (SCB) with H<SUB>2</SUB>O<SUB>2</SUB> for the production of bioethanol. The results showed better cellulose recovery and delignification for MnSO<SUB>4</SUB>.H<SUB>2</SUB>O and ZnO system. At optimized conditions (1% H<SUB>2</SUB>O<SUB>2</SUB>, 1g SCB, 30min, 100<SUP>o</SUP>C and 0.5:100g/mL), the maximum cellulose recovery of 93.42+/-1.74%, and delignification of 74.18+/-1.51% were obtained. The SCB was subjected to dilute acid hydrolysis, and under optimized conditions, the maximum glucose, xylose and arabinose concentrations obtained were 15.26+/-0.37g/L, 11.62+/-0.21g/L and 3.58+/-0.17g/L, respectively. The results of SEM, FTIR and XRD analysis suggested that the proposed method effectively removed lignin and disrupted the crystal structure of cellulose for a better hydrolytic process. The fermentation of hydrolyzate with Saccharomyces cerevisiae showed maximum bioethanol production of 13.1g/L at the end of 72h and bioethanol yield of 0.184g/g SCB.