Food Items Get Longer Life By Freeze Dryer Using Freeze Drying Technologies

Most of the food gets wasted without following the proper process of preservation. Presently, scientists have developed some of the modern equipments using freezedrying technologies which are able to preserve the food for a long time. 

This process is something different from other procedures. It remains the consistency, shape, color and intense flavor of the original products. As this procedure use a little amount of heat, the minerals and vitamins of the products preserved. 

 When the time come for consuming, just only adding water can return their original shape when they are freshly harvested. With the contact of the moisture, these products get their original character, flavor and color. 

The freeze dryer keeps the original structure of the products same as before only it removes water from them. Before going through the freeze drying procedure, the weight of the raw materials generally known as fresh weight. When the water removes from the products, their weight goes down and they become lighter even in some products, they come down 10 times lower than their original one! After the output, when the products contact to water, they absorb it and get their original shape back which is known as the instant character.  

Mainly freeze dryer works in three steps to get the desire result. These are Freezing, Drying and Dehydration. 

Process starts with freezing the products to lower temperature such as -18 degree C to -20 degree C. This is the main step to follow for keeping the same structure of the products as it was harvested. This step won’t let to loss the nutritional value of any food.   

After that second step starts which extracts the water from the raw material. To perform this action, frozen materials are kept into the vacuum chamber. When the products placed under low pressure, the remaining water removed in steam form which is popularly known as “sublimation”. To perform this process, heat is needed which can be obtained from different devices. The vacuum chamber and the condenser are attached and kept under the vacuum in order to transfer water molecules to directly vapor to the condenser where it deposited as ice form. 

After removing water from the products, they still contain a little amount in them which has a negative effective on its life and quality. So after placing under vacuum, the products have to go through another drying process and this is the last where products get completely dried.

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