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Freeze drying, also known as lyophilization or cryodesiccation, is a low temperature dehydration process [1] that involves freezing the product and lowering pressure, thereby removing the ice by sublimation. [2]
Membrane dryers operate on the principle of migration. The compressed air to be dried is passed over a membrane that has a high affinity for water vapor. The water vapor builds on the membrane and migrates through to the opposite or low pressure, side. A dry cover gas is flowed across the low pressure side and absorbs the water on the membrane.
My clothes dryer broke 7 years ago. ... My deep freeze is 1/4 full today...next week it's full. ... i am not very handy but turning a $1000 charge into the cost of half an hour and $40 for a part ...
Cryogenic IQF freezers immerse the product in liquid nitrogen at very low temperatures, freezing it rapidly while continuously moving the product to avoid block or lump formation. [5] Although this method shows good freezing results, it might lead to higher processing costs per weight of product due to the cost of the liquid nitrogen required.
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