title: Comparative study of alkaline hydrogen peroxide and organosolv pretreatments of sugarcane bagasse to improve the overall sugar yield.
abstract: Green liquor (GL) combined with H2O2 (GL-H2O2) and green liquor (GL) combined with ethanol (GL-ethanol) were chosen for treating sugarcane bagasse. Results showed that the glucose yield (calculated from the glucose content as a percentage of the theoretical glucose available in the substrates)of sugarcane bagasse from GL-ethanol pretreatment (97.7%) was higher than that from GL-H2O2 pretreatment (41.7%) after 72h hydrolysis with 18 filter paper unit (FPU)/g-cellulose for cellulase, 27,175 cellobiase units (CBU)/g-cellulose for β-glucosidase. Furthermore, about 94.1% of xylan was converted to xylose after GL-ethanol pretreatment without additional xylanase, while the xylose yield was only 29.2% after GL-H2O2 pretreatment. Scanning electron microscopy showed that GL-ethanol pretreatment could break up the fiber severely. Moreover, GL-ethanol pretreated substrate was more accessible to cellulase and more hydrophilic than that of GL-H2O2 pretreated. Therefore, GL-ethanol pretreatment is a promising method for improving the overall sugar (glucose and xylan) yield of sugarcane bagasse.
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: You
authors.affiliation: GuangXi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China.
authors.forename: Fuhou
authors.initials: F
authors.lastname: Lei
authors.affiliation: GuangXi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China.
authors.forename: Zuguang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, China.
authors.forename: Weiming
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Jianxin
authors.initials: J
authors.lastname: Jiang
mesh_terms: D000468:Alkalies; D002480:Cellulase / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry*; D005947:Glucose / Q000138:chemical synthesis*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry; D031786:Saccharum / Q000737:chemistry*; D012997:Solvents
chemical_list: D000468:Alkalies; D009930:Organic Chemicals; D012997:Solvents; D000431:Ethanol; D002482:Cellulose; C027433:bagasse; D006861:Hydrogen Peroxide; D002480:Cellulase; D005947:Glucose
keywords: Contact angle; Enzymatic hydrolysis; Green liquor-ethanol; Staining; Sugarcane bagasse