Freeze drying, also known as lyophilisation or cryodesiccation, is a low temperature dehydration process that involves freezing the product, lowering pressure, then removing the ice by sublimation. This is in contrast to dehydration by most conventional methods that evaporate water using heat.
Freeze drying used for food preservation
Freeze–drying is a special form of drying that removes all moisture and tends to have less of an effect on a food’s taste than normal dehydration does. In freeze–drying, food is frozen and placed in a strong vacuum. The water in the food then sublimates — that is, it turns straight from ice into vapor.
With freeze drying, foods and liquids can be dried at low temperatures without damaging their physical structure. Freeze–dried foods don’t need to be refrigerated or preserved with chemicals and can be reconstituted quickly and easily by adding water.
During the Second World War, freeze drying was also used for wartime medical supplies such as penicillin and blood plasma. In the following decades the use of freeze drying expanded to the point where today the technology is used in the production of around 400 different foodstuffs and many pharmaceuticals.
Harvest Right freeze dryer is device used to preserve food of all types for long-term storage or for daily use. Far better than a standard food dehydrator, a freeze dryer is more versatile and has a rapid return on investment. Preserve your garden produce, create the perfect emergency food supply, make camping meals and healthy snacks. Unlike other methods of food preservation, freeze drying does not shrink or toughen the food, and retains flavor, color, and nutrition.
Refrigerated, frozen, and canned food just don’t last very long. Freeze dried food will last up to 25 years and does not need to be to be rotated like other foods. Freeze dried food is perfect for home storage.
Harvest Right freeze dryers produce food that looks and tastes better than store-bought freeze dried food. Experience the Harvest Right difference!
Freeze drying works great for fruits and vegetables, but unlike other options, it also perfectly preserves meat, fish, dairy, eggs, ice cream, and even fully-cooked meals.