ABSTRACT: In order to explore the rapid drying method of Sugar and Ginger Tablets, the drying technology of Sugar and Ginger Tablets by microwave and hot air was studied. Firstly, the effects of microwave drying equipment, moisture content at conversion point and hot air temperature on the content of gingerol in Sugar and Ginger Tablets were investigated.
Then three factors and three levels of response surface were used to design and optimize the drying conditions of microwave combined with hot air, and the corresponding regression equation was established. The results show that the optimum combined drying process conditions are: microwave power 239 W in the early stage, moisture content 65% at the conversion point, and hot air temperature 61 C in the later stage. Under these conditions, the content of gingerol in Tangjiang tablets was (0.73 (+0.025)%. The relative error between the actual measured value and the theoretical predicted value was - 2.67%. The two values basically coincided.
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