The freeze drying machine is typically used to preserve food and making it convenient for transportation. In this process the food is quickly frozen up to -40`C so that all the water molecules get frozen and then pressure is increased up to its triple point by placing it in a vacuum so that the ice crystals that formed while freezing process get transformed directly to the gaseous state and are vacuumed from the system and the product gets completely dehydrated . 98% of water gets removed by this process, because of no water, the product can be preserved for long time.
There are number of advantages of freeze dried food:
- Shape, size and taste are maintained.
- Vitamins remain intact within the food.
- Easy transportation. Large amount of food can be transported at the same time and less cost.
- Can be rehydrated quickly in just 3-8 minutes just by adding hot water.
- Retain the nutritional quality.
Can be used as the meal replacement for schools, employees etc.
Vacuum freeze-drying technology is applied to process food material to make freeze dried food. The food freeze drying machine is used in all kinds of agricultural products.