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›› 2014, Vol. 14 ›› Issue (4): 643-648.

• 生化工程专栏 • 上一篇    下一篇

草酸预浸连续汽爆玉米芯制备木糖的模拟与中试研究

潘裕清 张宏嘉 邱学良 欧阳显鸿 王文雅 李双喜 张秋翔 袁其朋   

  1. 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院 北京化工大学生命科学与技术学院
  • 收稿日期:2014-05-04 修回日期:2014-07-15 出版日期:2014-08-20 发布日期:2014-08-20
  • 通讯作者: 王文雅

Simulation and Pilot Test of Xylose Production Using Oxalic Acid-saturated Continuous Steam Explosion of Corncob

PAN Yu-qing ZHANG Hong-jia QIU Xue-liang OUYANG Xian-hong WANG Wen-ya LI Shuang-xi ZHANg Qiu-xiang YUAN Qi-peng   

  1. College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology College of Life Science and Technology, Beijing University of Chemical Technology School of Life Science and Technology, Beijing University of Chemical Technology
  • Received:2014-05-04 Revised:2014-07-15 Online:2014-08-20 Published:2014-08-20
  • Contact: WANG Wen-ya

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摘要： 以草酸预浸玉米芯，对预浸料进行连续汽爆处理，考察了汽爆条件对木糖产量的影响，研究了水洗后汽爆物料的酶解状况. 结果表明，1.0 MPa汽爆压力、8 min维压时间、草酸/干玉米芯比45 g/kg为草酸连续汽爆制备木糖的最优条件. 采用SPSS statistics软件构建汽爆参数模型，方程相关系数均大于0.9，可用于描述实验条件与木糖产量的关系. 中试结果表明，3.81 kg干玉米芯可得415.50 g木糖，即约9.17 t玉米芯可产1 t木糖，达到工业生产要求. 酶解结果表明，草酸预浸汽爆玉米芯葡萄糖产量较中性汽爆玉米芯和未处理玉米芯分别提高32.30%和214.87%.

关键词: 草酸, 连续汽爆, 玉米芯, 模型, 酶解

Abstract: The effects of steam explosion parameters of oxalic acid-saturated corncob on xylose production and the effect of enzymatic hydrolysis of resulting explosive residue on glucose were investigated. The results indicate that the optimized conditions of steam explosion were pressure 1.0 MPa, time 5 min and oxalic acid/dried corncob ratio 45 g/kg. Based on the optimized conditions, a process model of oxalic acid-saturated continuous steam explosion (OSCSE) was developed by SPSS statistics and the correlation coefficient (R2) of equations was greater than 0.9, which indicated that they can be applied to predict the productivity of xylose. The pilot scale test showed that 415.50 g xylose could be produced with 3.81 kg dried corncob, i.e., 1 t of xylose could be produced from 9.17 t of dried corncob, which meets the demand of industrial production. The enzymatic hydrolysis of explosive residue indicated that the glucose productivity from OSCSE was higher than that from H2O-saturated steam explosion of corncob and that from the control by 32.30% and 214.8%, respectively.

Key words: oxalic acid, continuous stream explosion, corncob, model, enzymatic hydrolysis

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