Thermo-chemical pretreatment and enzymatic hydrolysis for enhancing saccharification of catalpa sawdust. (April 2016)

• Record Type: Journal Article
• Authors: Jin, Shuguang; Zhang, Guangming; Zhang, Panyue; Li, Fan; Fan, Shiyang; Li, Juan
• Is Part Of: Bioresource technology. Volume 205(2016)
• Page Start: 34
• Page End: 39
• Publication Date: 2016-04
• Subjects: Catalpa sawdust -- Thermo-chemical pretreatment -- Ca(OH)2 -- Enzymatic hydrolysis -- Lignocellulosic biomass; 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.2016.01.019
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Catalpa sawdust structures by four thermo-chemical pretreatments were compared. Solubilization of cellulose, hemicellulose and lignin were examined. Optimal factors were 160 °C, 3 min and 1.75% (w/v) Ca(OH)2 for reducing sugar yield. Thermo-Ca(OH)2 pretreatment is a promising method for catalpa sawdust enzymolysis. Abstract: To improve the reducing sugar production from catalpa sawdust, thermo-chemical pretreatments were examined and the chemicals used including NaOH, Ca(OH)2, H2 SO4, and HCl. The hemicellulose solubilization and cellulose crystallinity index (CrI) were significantly increased after thermo-alkaline pretreatments, and the thermo-Ca(OH)2 pretreatment showed the best improvement for reducing sugar production comparing to other three pretreatments. The conditions of thermo-Ca(OH)2 pretreatment and enzymatic hydrolysis were systematically optimized. Under the optimal conditions, the reducing sugar yield increased by 1185.7% comparing to the control. This study indicates that the thermo-Ca(OH)2 pretreatment is ideal for the saccharification of catalpa sawdust and that catalpa sawdust is a promising raw material for biofuel.