食品科学2016，Vol.37Issue(14)：43-50,8.DOI:10.7506/spkx1002-6630-201614008
响应面试验优化微波-超声协同辅助硫酸降解玉米秸秆工艺
Optimization of Microwave/Ultrasonic-Assisted Sulfuric Acid Hydrolysis of Corn Straw by Using Response Surface Methodology
摘要
Abstract
In this study, we evaluated and compared the effectiveness of single and combined applications of microwave and ultrasonic for enhancing the sulfuric acid hydrolysis of corn straw. It turned out that the combined use of microwave and microwave was superior to either alone. Further, we optimized the microwave/ultrasonic hydrolysis process by using one-factor-a-time method and response surface methodology. A quadratic regression model for predicting the yield of reducing sugar as a function of 5 independent variables was formulated and validated. The marginal effect of the independent variables studied and their interactions were tested. The optimal process conditions were obtained as follows:temperature, 82 ℃;reaction time, 153 min;sulfuric acid concentration, 3.1%;solid/liquid ratio, 1:45 (g/mL);and microwave power, 634 W. Under these conditions, the maximum yield of reducing sugar of 41.24%was obtained experimentally, which was in good agreement with the model prediction, indicating that the model is feasible. A 6.6%increase was achieved as compared to that obtained under the conditions:reaction time for 2 h at 120℃, a sulfuric acid concentration of 3%, and a solid/liquid ratio of 1:20 (g/mL). Ion chromatographic analysis revealed that the hydrolysate solution under the optimized conditions contained 1.75%arab sugar, 0.44%galactose, 15.65%glucose, 7.98%xylose, 15.34%fructose, and 0.09%cellobiose.关键词
玉米秸秆/微波/超声波/还原糖/响应面法/离子色谱Key words
corn straw/microwave/ultrasound/reducing sugar/response surface methodology/ion chromatography分类
环境科学引用本文复制引用
李文杰,李洪飞,王维浩,贾鹏禹,康丽君,寇芳,张莉莉,尹婧,曹龙奎..响应面试验优化微波-超声协同辅助硫酸降解玉米秸秆工艺[J].食品科学,2016,37(14):43-50,8.基金项目
生物质综合利用生产产业化技术项目（2041020002）；黑龙江省科技攻关项目 （）
