title: Facilitating the enzymatic saccharification of pulped bamboo residues by degrading the remained xylan and lignin-carbohydrates complexes.
abstract: Kraft pulping was performed on bamboo residues and its impact on the chemical compositions and the enzymatic digestibility of the samples were investigated. To improve the digestibility of sample by degrading the xylan and lignin-carbohydrates complexes (LCCs), xylanase and α-L-arabinofuranosidase (AF) were supplemented with cellulase. The results showed more carbohydrates were remained in the samples pulped with low effective alkali (EA) charge, compared to conventional kraft pulping. When 120 IU/g xylanase and 15 IU/g AF were supplemented with 20 FPU/g cellulase, the xylan degradation yield of the sample pulped with 12% EA charge increased from 68.20% to 88.35%, resulting in an increased enzymatic saccharification efficiency from 58.98% to 83.23%. The amount of LCCs in this sample decreased from 8.63/100C9 to 2.99/100C9 after saccharification with these enzymes. The results indicated that degrading the remained xylan and LCCs in the pulp could improve its enzymatic digestibility.
authors.affiliation: College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Caoxing
authors.initials: C
authors.lastname: Huang
authors.affiliation: College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Juan
authors.initials: J
authors.lastname: He
authors.affiliation: College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: College of Light Industry Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Douyong
authors.initials: D
authors.lastname: Min
authors.affiliation: College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: swhx@njfu.com.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yong
mesh_terms: D001673:Biodegradation, Environmental; D002241:Carbohydrates / Q000138:chemical synthesis* / Q000737:chemistry*; D004789:Enzyme Activation; D006026:Glycoside Hydrolases / Q000737:chemistry*; D007220:Industrial Waste / Q000517:prevention & control; D008031:Lignin / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods; D031787:Sasa / Q000737:chemistry*; D014990:Xylans / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D007220:Industrial Waste; D010936:Plant Extracts; D014990:Xylans; D008031:Lignin; D006026:Glycoside Hydrolases; C023305:hemicellulase
keywords: Enzymatic saccharification; Hemicellulase; Kraft pulping; Lignin carbohydrate complexes; Moso bamboo residues