Absrtact: Through single factor test, orthogonal test and validation test of far-infrared and microwave drying technology in the drying process of sweet potato, the effects of different far-infrared drying time, far-infrared drying temperature, material quality and microwave drying time, microwave power and slice thickness on the drying process of sweet potato were discussed.
The experimental results show that the optimum drying technology of far infrared-microwave is: drying temperature 115 C, drying time 2 h, material quantity 0.2 kg/kW, microwave drying equipment 240 s, microwave power 550 W, material slice thickness 2 mm. Under these conditions, the drying rate of dried gourd materials tends to be uniform and the heating is uniform, which provides useful parameters for the industrial application of combined drying gourd drying.
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