Effects of alkaline organosolv delignification on enzymatic conversion of cellulose from sugarcane bagasse pretreated by steam explosion
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AuthorM. Oliveira, Luis R.; Nascimento, Viviane M.; Corso, Débora Lee S.; N. Silva, Vinícius F.; M. Rocha, George J.; [et al.]
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The enzymatic conversion of pretreated and delignificated sugarcane bagasse was evaluated by L18 Taguchi experimental design. The factors selected for the study were: ethanol and caustic soda concentration, temperature, reaction time and fiber/liquor ratio. The NaOH concentration was the only significant factor in the delignification, hemicellulose solubilization and cellulose conversion. Recovery of ethanol was influenced by only the fiber/liquor ratio, for the same level. The lignin and hemicellulose removal from bagasse pretreated by steam explosion has reached over 80% and 55%, respectively. Pulps with the lowest lignin and hemicellulose contents had the best results of the cellulose conversion, almost 70%.
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