Facilitating the enzymatic saccharification of pulped bamboo residues by degrading the remained xylan and lignin–carbohydrates complexes. (September 2015)

• Record Type: Journal Article
• Authors: Huang, Caoxing; He, Juan; Li, Xin; Min, Douyong; Yong, Qiang
• Is Part Of: Bioresource technology. Volume 192(2015)
• Page Start: 471
• Page End: 477
• Publication Date: 2015-09
• Subjects: Moso bamboo residues -- Kraft pulping -- Lignin carbohydrate complexes -- Hemicellulase -- Enzymatic saccharification; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.06.008
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Effect of kraft pulping on bamboo saccharification was evaluated. Hemicellulase could degrade the linkage of LCCs. Xylan and LCCs degradation improved enzymatic saccharification. 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.