If we consider at the present situation preserving food products are very necessary because, most people in the world are not getting proper food and going through malnutrition issues. In the same time, we can have some areas those have excess food products and most of them got wasted due to lack of preservation facilities. Also there are some facilities available which are can be used for storing the food products but they will make loss of the nutrition value which by the food products gets lost. |
Lyophilization is the answer for these issues by which someone can preserve the food for a long time without losing any nutritional and aesthetic value. This process generally removes the moisture or water content from the food products by freezing. This process results almost all the preservation of the products without shrinking associated with drying or freezing the fresh food. Various products such as fruits, seeds, animal products stay usable for a long time with this procedure. Furthermore the output products are lighter in weight and smaller in size; as a result you can store them in narrow spaces or packets.
Freeze drying equipment are available in various sizes to match the production requirement but each have a same functionality and produce same result. The freeze drying process based mainly on the fundamentals of sublimation of solvents of water from solids which have them in the disbanded state. The main process follows some logical steps of pre freezing and drying.
To make the process easier, just freeze the products conventionally using the ice or any freezing devices. If you will do this prior, it will create low temperature for the nest step and this procedure also solid the moisture which is beneficial for drying. If you have followed the proper procedure, the products will last for longer time which will beneficial in many ways. The main objective of following this step is, to make frozen matrix of the crystals which will let the moisture release easily. Depending on your intention which type of output you want, it should be finished before 24 hours.
After freezing, now time to place the items under vacuum procedure. First place thoroughly inside the machine and set the appropriate vacuum which will slowly suck the air from the freezed products and make them water free. As a result, the size of the products will be lesser and the weight also got downed. This is the main procedure which is responsible to preserve the items for longer time and allow the products to place in smaller packets than before.
So if you have excess food products or you want to process the products commercially use freeze dry process and get the desire result.
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