4种金属离子预处理活化小麦秸秆及糖化性能研究

Study on Activation of Wheat Straw by Pretreatment With Four Metal Ions and Its Saccharification Properties

秸秆等木质纤维素类生物质内含有丰富的纤维素、半纤维素和木质素,其中纤维素作为一种丰富的可再生资源,可水解生成葡萄糖,进一步发酵生成乳酸等。由于秸秆内部结构的复杂性和稳定性,直接进行酶解糖化产率并不理想。文章以小麦秸秆为原料,探究4种金属离子(Na^(+)、Fe^(3+)、Al^(3+)、Zn^(2+))预处理活化小麦秸秆糖化的新工艺。该次试验分NaCl组、FeCl_(3)组、AlCl_(3)组和ZnCl_(2)组等4组进行,试验结果显示,FeCl_(3)组的小麦秸秆还原糖产率最高。

Lignocellulosic biomass such as straw is rich in cellulose,hemicellulose and lignin.As a rich renewable resource,cellulose can be hydrolyzed to glucose and further fermented to lactic acid and other products.However,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 used wheat straw as raw material to explore the new technology of four metal ions(Na^(+),Fe^(3+),Al^(3+),Zn^(2+))pretreatment to activate the saccharification of wheat straw.The experiment was divided into four groups:NaCl group,FeCl_(3) group,AlCl_(3) group and ZnCl_(2) group.The results showed that the yield of reducing sugar in wheat straw of FeCl_(3) group was the highest.