Enhanced enzymatic saccharification of sugarcane bagasse pretreated by combining O sub(2) and NaOH

• Published in: Bioresource technology Vol. 214; pp. 692 - 699
• Main Authors: Bi, Shuaizhu, Peng, Lincai, Chen, Keli, Zhu, Zhengliang
• Format: Journal Article
• Language: English
• Published: 01.08.2016
• ISSN: 0960-8524
• DOI: 10.1016/j.biortech.2016.05.041

Sugarcane bagasse pretreated by combining O sub(2) and NaOH with different variables was conducted to improve its enzymatic digestibility and sugar recovery, and the results were compared with sole NaOH pretreatment. Lignin removal for O sub(2)-NaOH pretreatment was around 10% higher than that for sole NaOH pretreatment under the same conditions, and O sub(2)-NaOH pretreatment resulted in higher glucan recovery in the solid remain. Subsequently, O sub(2)-NaOH pretreated sugarcane bagasse presented more efficient enzymatic digestibility than sole NaOH pretreatment. Under the moderate pretreatment conditions of combining 1% NaOH and 0.5 MPa O sub(2) at 80 degree C for 120 min, a high glucan conversion of 95% was achieved after 48 h enzymatic hydrolysis. Coupled with the operations of pretreatment and enzymatic hydrolysis, an admirable total sugar recovery of 89% (glucose recovery of 93% and xylose recovery of 84%) was obtained. The susceptibility of the substrates to enzymatic digestibility was explained by their physical and chemical characteristics.