1. Preparation of Lycium barbarum freeze-drying machine: Lycium barbarum is vacuum freeze-dried. It is found that after processing fresh Lycium barbarum with freeze-drying machine technology, its color, aroma, taste, and nutrients are effectively preserved. The Lycium barbarum powder prepared by freeze-drying is light, easy to preserve, and easy to transport. Freeze-drying machine processing technology provides good and effective processing means for the deep processing of Lycium barbarum.
2. Production of fresh lotus seed freeze-drying machine: the fresh lotus seeds were freeze-dried by orthogonal test, and the sensory physical and chemical characteristics of freeze-dried lotus seed products such as water content, appearance, rehydration, and nutritional components were explored. The results showed that the freeze-drying machine processing technology not only did not change the flavor of fresh lotus seeds but also avoided the loss of nutritional components. The optimal freeze-drying process parameters of lotus seeds were obtained: the loading material was 750g per plate, the quick-freezing temperature was - 36 ℃, the quick-freezing time was 12h, and the warehouse pressure during drying and sublimation was 110 ~ 130pa; During drying and analysis, the bin pressure is 30 ~ 50pA, and the material temperature during analysis is 45 ~ 50 ℃.
