响应面法对黑枣真空冷冻干燥时间工艺的优化

Optimization of Process Dateplum persimmon Vacuum Freeze Drying Time of Response Surface Method

应用响应面法探索黑枣真空冷冻干燥的4个单因素即干燥仓压(X1)、温度(X2)、预冻速率(X3)与装料量(X 4)对黑枣冻干时间的影响。通过二次通用旋转回归组合响应面设计试验建立冻干时间与4个单因素的回归数学模型。采用SAS 9.2软件进行响应面分析,得到黑枣最佳真空冷冻干燥工艺参数为干燥仓压力55 Pa,加热板温度55℃,预冻速率3.3℃/mim,装料量9 kg/m2。

Application of response surface method to explore four single factor Dateplum persimmon vacuum freeze drying drying chamber pressure analysis（X1）,temperature（X2）,freezing rate（X3） and loading（X4） effect on Dateplum persimmonfreeze dry time.Through the two general rotational regression combination response regression mathematical model of freeze drying time and four single factors to establish design test.Response surface analysis was carried out using SAS 9.2 software,get the best drying technical parameters of vacuum freeze dry jujube storage pressure 55 Pa,the heating plate temperature 55 ℃,freezing rate of 3.3 ℃/min,the load of 9 kg/m^2.