蒸汽爆破玉米秸秆提高酶解还原糖产率的研究  

Study on Improving Reducing Sugar Yield of Steam-explosive Corn Stalk by Enzymatic Hydrolysis

作　　者：宁欣强[1] 王远亮[1] 曾国明[1] 任慧卿[1] 王珍[1] 

机构地区：[1]重庆大学生物工程学院生物流变科学与技术教育部重点实验室国家"985工程"生物材料与仿生工程研究中心,重庆400044

出　　处：《精细化工》2010年第9期862-865,共4页Fine Chemicals

基　　金：国家自然科学基金(30870609);重庆市自然科学基金(CSTC2009BA4025);重庆市发改委和重庆市教委项目(KJ091415)~~

摘　　要：对玉米秸秆进行蒸汽爆破预处理,并对处理前后的玉米秸秆组分和结构进行了表征。酶解24 h的实验结果表明,与未处理秸秆相比,汽爆处理后样品的还原糖产率提高了97%。化学与物理分析结果表明,处理后物料半纤维素及可溶性物质质量分数减少,纤维素质量分数增加29.7%;X射线衍射仪（XRD）和扫描电镜（SEM）表明纤维素致密结构被破坏。预处理后物料酶解还原糖产率最高时汽爆工艺参数为：汽爆压力2.2 MPa,每克秸秆原料加入1 mL蒸馏水（简称液固比1 mL/g）,维压时间9 min,物料颗粒度4060目。Corn stalk was treated by steam explosion,and the structures of the untreated/treated corn stalk were detected by scanning electron microscope（SEM） and X-ray diffraction（XRD）,while their chemical composition was also investigated.Comparing with the untreated corn stalk,the reducing sugar yield of treated corn stalk was increased by 97% after hydrolyzing for 24 h.The relative content of hemicelluloses and solvent decreased,while the cellulose increased by 29.7%;the compact structure of corn stalk was significantly destroyed.The optimum steam exploded process condition：operating pressure 2.2 MPa,solid-liquid ratio 1∶1,reaction time 9 min and material size 4060 meshes.

关 键 词：玉米秸秆 蒸汽爆破 均匀设计 酶解 还原糖产率 

分 类 号：TQ353[化学工程]