摘要
[目的]对雪莲果果粉喷雾干燥工艺进行优化。[方法]选取料液固形物含量(A)、进料流量(B)、进风温度(C)3个影响雪莲果果粉喷雾干燥感官品质的主要因素进行3因素3水平响应面试验设计;建立雪莲果果粉喷雾干燥感官评定标准;通过Design Expert软件对试验数据进行方差分析和回归分析,进而预测出最优的雪莲果果粉喷雾干燥工艺,对回归模型的精度及优化工艺的可行性进行验证,并对雪莲果果粉的理化指标和微生物指标进行检测。[结果]利用Design Expert软件进行二次多元回归拟合,得到雪莲果果粉喷雾干燥产品感官评分预测值(Y)对编码自变量A、B和C的二次多项回归方程为:Y=85.40+2.75A-1.13B-3.13C-0.75AB-1.75AC-8.50BC-4.20A2-4.45B2-10.95C2。利用Design Expert得到优化的喷雾干燥工艺为:料液固形物含量37.27%,进料流量18.93 ml/min,进风温度156.14℃。3次重复试验的最大相对误差为3.34%,证明应用响应曲面法得到的回归模型的精度较高,优化的雪莲果果粉喷雾干燥工艺是可行的。[结论]该研究为雪莲果的深加工提供了参考依据。
[ Objective] The spray drying technology of Smallanthus sonchifolius powder was optimized through the experiment. [ Method Three factors： the content of solid （A） in liquid, the flowing rate of feed （B） and the air temperature at inlet（ C ）, affecting the sensory quality of spray dried Smallanthus sonchifolius powder was analyzed with the experimental design of response surface with 3 factors at 3 levels. The standard of the sensory evaluation of spray - dried powder was established and the optimal spray drying process of the powder could be predic- ted through the variance and regression analysis of the test data with Design Expert software. The accuracy of the regression model and the fea- sibility of the optimization process could be validated. The physic - chemical and microbial indicators were detected. [ Results ] By means of the Design Expert software, the quadratic regression equation was ： Y = 85.40 ＋ 2.75A - 1.13B - 3.13 C - 0. 75AB - 1.75AC - 8.50BC - 4.20 A2 -4. 45B2 -10. 95C2 ,in which,the predicted sensory value was Y and the coding variable was A,B and C,respectively. And the optimal spray drying process was as follows ： the content of solid was 37.27% ; the feeding flow, 18.93 ml/min and the air temperature at inlet, 156.14 9C. In 3 times＇ tests,the maximum relative error was 3.34% ,in which it was proved the regression model based on the response surface meth- odology was with a high precision and the optimized technique was feasible. [ Conclusion] Through the study a reference for the deep process- ing of Smallanthus sonchifolius products was provided.
出处
《安徽农业科学》
CAS
北大核心
2010年第31期17429-17431,17458,共4页
Journal of Anhui Agricultural Sciences
关键词
雪莲果
喷雾干燥
响应曲面法
Smallanthus sonchifolius
Spray drying
Response Surface Methodology
