碱和金属离子预处理小麦秸秆产糖的研究

Study on Sugar Production from Wheat Straw Pretreated with Alkali and Metal Ions

小麦秸秆富含木质素、纤维素和半纤维素,其中微生物以纤维素为碳源,发酵产生乳酸等高附加值产品。但是由于秸秆内结构的复杂性和稳定性,直接进行酶解糖化产率并不理想。以小麦秸秆为原料,探究碱和金属离子预处理活化小麦秸秆产糖的新工艺。实验分为7组进行:NaOH组、FeCl_(3)组、AlCl_(3)组、ZnC_(2)组、NaOH+FeCl_(3)组、NaOH+AlCl_(3)组、NaOH+ZnCl_(2)组。实验结果显示,NaOH+FeCl_(3)组的小麦秸秆还原糖产率最高。

Wheat straw is rich in lignin,cellulose and hemicellulose.Microorganisms use cellulose as carbon source to produce lactic acid and other high value-added products.Due to the complexity and stability of the internal structure of straw,the yield of direct enzymatic hydrolysis and saccharification is not ideal.To solve this problem,this experiment uses wheat straw as raw material to explore the new technology of alkali and metal ion pretreatment to activate wheat straw to produce sugar.The experiment is divided into seven groups:NaOH group,FeCl_(3) group,AlCl_(3) group,ZnCl_(2) group,NaOH+FeCl_(3) group,NaOH+AlCl_(3) group,NaOH+ZnCl_(2) group.The results shows that the yield of reducing sugar of wheat straw in NaOH+FeCl_(3) group is the highest.