鲜切藕片热风薄层干燥工艺优化及数学模型建立

利用单因素和正交试验以及SPSS12.0 等方法，在热风薄层干燥平台上对鲜切藕片的热风薄层干燥工艺及数学模型进行系统研究。结果表明，鲜切藕片热风薄层干燥的最佳工艺条件：热风温度70℃、风速0.3m/s、装样量40g。在该最佳工艺条件下，产品的干燥速率、碘蓝值、白度和复水性4 个指标均达到最好的水平，建立鲜切藕片的热风薄层干燥数学模型为MR=0.857412114exp(－ 0.050102613t) (R2=0.96537)。通过预测值和测定值的比较，表明该方程能够较好的模拟该条件下鲜切藕片的干燥过程。

Technological Optimization and Mathematical Model Establishment of Hot-air Thin Layer Drying for Fresh-cut Lotus Roots Slices

Technological process and mathematical model of hot-air thin layer drying for fresh-cut lotus roots were systematically investigated using single factor and orthogonal test through SPSS12.0 analysis. Results indicated that the optimal technological condition for drying fresh-cut lotus roots slices was 70 ℃ of hot air, 0.3 m/s of hot air rate, and 40 g of loading amount. Under this optimal condition, drying rate, iodine-blue value, whiteness and water-holding capacity reached the perfect level. A mathematical model had been established and expressed with the equation MR = 0.8574exp(－0.0501t) (R2 = 0.9654) through SPSS12.0 analysis. The speculated results using this mathematical model were in good agreement with the determined results, which suggested that this mathematical model could be applied to demonstrate the process of hot-air thin layer drying for fresh-cut lotus roots.