Effects of acidified aqueous glycerol and glycerol carbonate pretreatment of rice husk on the enzymatic digestibility, structural characteristics, and bioethanol production. (March 2017)

• Record Type: Journal Article
• Authors: Ebrahimi, Majid; Villaflores, Oliver B.; Ordono, Emma E.; Caparanga, Alvin R.
• Is Part Of: Bioresource technology. Volume 228(2017)
• Page Start: 264
• Page End: 271
• Publication Date: 2017-03
• Subjects: Rice husk -- Glycerol carbonate pretreatment -- Acidified glycerol -- Glucan digestibility -- SSF; 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.2016.12.106
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Glycerol carbonate solvent as a novel pretreatment was performed on rice husk. A small portion of acids as a catalyst mixed with the pretreatment solvents. AGC treatment improved glucan digestibility and lignin removal more than AAG treatment. Ethanol production of 11.58 and 8.84 g/L obtained from SSF under anaerobic condition. Abstract: Rice husk as an abundant biomass was used in this study, and it contained 30.1% glucan and 13.5% xylan, 22.4% lignin. The pretreated rice husk with glycerol carbonate and acidified aqueous glycerol (10% water) at 90 °C and 130 °C for 60 min had the maximum yield of glucan digestibility which was 78.2% and 69.7% respectively, using cellulase for 72 h. The simultaneous saccharification and fermentation was conducted anaerobically at 37 °C with Saccharomyces cerevisiae, 5% w/v glucan and 10 FPU/g glucan of cellulase. 11.58 and 8.84 g/L was the highest ethanol concentration after 3 days of incubation form pretreated rice husk with glycerol carbonate and acidified aqueous glycerol respectively.