Abstract
An alternative sodium methoxide (CH3ONa) in methanol medium was investigated for the pretreatment of bagasse. The use of CH3ONa as an alkaline promoter resulted in relatively high delignification efficiency and solid glucan recovery. The modified pretreatment process helps improve the enzymatic hydrolysis for sugar production. The effect of the reaction condition was evaluated by response surface methodology (RSM) to determine the maximized glucose yield. The optimal condition was performed at 150 °C for 63.9 min in the presence of CH3ONa promoter of 5.1% w/v, leading to the delignification of 86.5% and the maximized glucose yield of 83.9%. The reusability suggests that the recovery of the solvent mixture without the purification process showed efficiency in consecutive batch processing with five cycles. Structural characteristic analysis (i.e., SEM and XRD) of pretreated bagasse demonstrated significant removal of lignin fraction, resulting in increased cellulose digestibility in enzymatic hydrolysis for sugar platform biorefinery.
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Funding
This project was financially supported by a research grant (RTA 6280003) from the Thailand Research Fund. Saksit Imman and Nopparat Suriyachai were supported by a Unit of Excellence (UOE63006) from the University of Phayao.
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Weerasai, K., Laosiripojana, N., Imman, S. et al. Reusable alkaline catalyzed organosolv pretreatment and delignification of bagasse for sugar platform biorefinery. Biomass Conv. Bioref. 13, 1751–1761 (2023). https://doi.org/10.1007/s13399-020-01269-w
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DOI: https://doi.org/10.1007/s13399-020-01269-w