Freeze-dried food, namely vacuum freeze-dried food (FD food). Freeze-dried vegetables, as the name suggests, are vegetables that are freeze-dried in a vacuum.
What are the characteristics of freeze-dried vegetables?
Freeze-dried vegetables are actually quick-freezing the water in the food into ice, and then heating it at high temperature to sublimate the water into a gas, so that the food will be dehydrated and dry. Since various microorganisms and enzymes cannot act on dehydrated food through water, the effect of long-term preservation is achieved.
This freeze-drying processing technology can keep the original color, aroma, taste and nutritional content of food to the greatest extent, and it is very convenient to eat, while dehydrated food often adopts the process of promoting the evaporation of water in the food under artificial control conditions. , including natural drying (sun-drying, air-drying, shade-drying) and artificial drying (stove, drying room, mechanical drying, other drying) and other methods.
Freeze-dried food often preserves most of the color, aroma, taste and nutritional components of the food, and there is no major change in appearance, strong rehydration, and can be stored for a long time without preservatives, and it can be stored to a great extent. retain some vitamins and minerals.
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