响应曲面法优化冬菜副产物酶解液喷雾干燥工艺

Optimization of spray drying technique of enzymatic hydrolysis preserved vegetables by-products with response surface methodology

利用响应面分析法研究酶解液固形物与助干剂比例、入料浓度、喷雾流量和进口温度对冬菜副产物酶解液喷雾干燥效果的影响。在单因素实验基础上,采用Box-Benhnken实验,以四个自变量为影响因素,以集粉率和感官评定分值为响应值建立二次回归方程。结果表明,喷雾干燥的最优工艺参数:酶解液固形物与助干剂比例4.4∶5.6、入料浓度18.1%、喷雾流量341.4mL/h和进口温度176.5℃,在此条件下得到集粉率为51.37%,感官评定得分为83。

The influence of the ratio of solids to drying aids, inlet concentration, spray flow and inlet temperature on the effect of spry drying were optimized by response surface methodology. On the basis of single-factor investigations Box-Benhnken experiments were made to offer data for the establishment of quadratic regression models for the yield of drying power and sensory evaluation as function of the four variables.The highest yield of drying power and sensory evaluation were 51.37% and 83, respectively, at the following optimized conditions：the ratio of solids to drying aids 4.4：5.6, inlet concentration 18.1%, spray flow 341.4mL/h and inlet temperature 176.5℃.