Comparative study on pretreatment of wheat straw cellulose with compound method

Wheat straw cellulose was used as the main raw material,which was pretreated by using the methods of alkali soaking /steam,steam/ alkali soaking,steam,freezing/ steam,alkali soaking / freezing,then the enzymolysis reaction was conducted under a given condition.The results of pre-treatment of wheat straw cellulose with chemical methods were evaluated by analyzing the concen-tration of reducing sugar in zymohydrolysis solution.The results showed that,after 24 h of enzymol-ysis reaction,the output of glucose for the wheat straw which was first soaked in Sodium hydroxide and then pretreated 40min by steam was 15% higher than that of the wheat straw without pretreat-ment;for the wheat straw which was first soaked in Sodium hydroxide and then frozen at an ultra low temperature of-80 ℃,the output of glucose will be slightly increased after 12 h of enzymolysis,and it will be increased by 23% after 48 h of enzymolysis.