为提高鸡枞菌干燥质量,探究干燥中含水量的变化规律,以鸡枞菌为试材,采用热风-微波联合干燥方式优化干燥条件,并建立干燥动力学模型。结果表明:鸡枞菌热风-微波联合干燥最佳工艺为先采用60 ℃热风干燥230 min至转换点干基含水率为0.57 g/g,再以微波密度6.78 W/g干燥12 min至干基含水率为0.12 g/g;鸡枞菌前期热风干燥和后期微波干燥的含水率变化可分别用Logarithmic模型和Sweibull2模型进行模拟,模型R2、 χ2和均方根误差的平均值分别为0.999 10、6.058 50×10-5和0.005 66;相同实验条件下,模型的预测值与实验值拟合较好,该模型适合预测鸡枞菌热风-微波联合干燥过程的水分含量变化规律。该研究可为鸡枞菌联合干燥加工提供理论依据。
In order to improve the quality of Termitomyces albuminosus, the change of water content in drying process was investigated using hot-air combined with microwave drying. Meanwhile, the drying kinetics were also being established through nonlinear fitting. The results showed that the optimum condition was to dried at 60 ℃ for 230 min to make dry base moisture content to 0.57g/g of the conversion point, and then dried for 12 min which could make the dry base moisture content reach 0.12 g/g with microwave density 6.78 W/g. The hot air and microwave treatment could be simulated and predicted by Logarithmic and Sweibull2 models, which with the mean values of R2, χ2 and root-mean-square error were 0.999 10, 6.058 50×10-5 and 0.005 66, respectively. The predicted values from these models were perfectly consistent with the experimental values under identical experimental conditions. Therefore, the models could be used to predict the moisture change of Termitomyces albuminosus during drying process. This study can provide theoretical basis for the application of Termitomyces albuminosus drying and the processing of dried products.
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