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Title
Effect of glycerol pretreatment on component recovery and enzymatic hydrolysis of sugarcane bagasse
Authors
Carlos Martin Jurgen Puls Bodo Saake and Andreas Schreiber
Received
June 16, 2011
Published
Volume 45 Issue 7-8 September-October
Keywords
sugarcane bagasse, glycerol, pretreatment, enzymatic hydrolysis
Abstract
Sugarcane bagasse was pretreated with glycerol (40-80% (w/w)) either in the presence of NaOH or HSO , 2 4 or without any chemicals, at 190 °C, 10% biomass load, for 1 to 4 hours. The pretreatments resulted in cellulose-enriched fibres and different degrees of xylan and lignin solubilisation. Cellulose recovery was higher in pretreatments with NaOH addition and without any chemicals, than in those with HSO . Xylan 2 4 solubilisation was almost complete in all H SO -assisted treatments whereas, in the other experiments, it 2 4 decreased with the increase in glycerol concentration and increased with the pretreatment time. Lignin solubilisation increased proportionally with glycerol concentration. Under all conditions applied, the pretreatment improved the enzymatic hydrolysis of cellulose. The highest overall cellulose convertibilities were achieved in the glycerol pretreatments without other chemicals (85-94%). Convertibility decreased with time in acidic pretreatments, and increased slightly for the other ones. Enzymatic conversion of the xylan retained in the fibres was also detected.
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