2011•Journal of Tianjin University of Science and TechnologyRequires access
Effects of Different Pretreatment Methods on Enzymatic Hydrolysis of Cotton Stalk
Pu ChunGang
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Abstract
Effect of the chemicals dosage of dilute sulfuric acids,ulfurous acid and sulfite pretreatment and enzymatic hy-drolysis of cotton stalk was investigated.The scanning electron microscopic(SEM)analysis of untreated and treated cotton stalk was performed for comparing these methods.Under conditions of liquid ratio 1∶4t,emperature 180,℃ for 20,min,cellulase 10 U/gc,ellobiase 3.6 U/g compared to substrate,enzymatic hydrolysis conversion rate was 42.63% when 5.52% sulfuric acid with mass fraction of 98% for pretreating cotton stalk,enzymatic hydrolysis conversion rate was 81.25% when 7% sulfurous acid for pretreating cotton stalk,and enzymatic hydrolysis conversion rate was 70.06% when 0.92% sulfuric acid with mass fraction of 98% and 8% sodium bisulfite for pretreating cotton stalk.