Research and Application of Vacuum Freeze-Drying Technology

Vacuum freeze-drying, including the techniques of vacuum, freezing and drying, is a food processing method. This paper elaborates the freeze-drying mechanism and technology, and the characteristics of freeze-drying products were presented on the basis of a comparison between the quality of freeze-drying products and that of air-drying products. Finally, vacuum freeze-drying method was applied to freezing-dry fiddleheads.