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Drying technology: Guideline on benefit of freeze drying for emergency food storage

Drying technology: Guideline on benefit of freeze drying for emergency food storage

          
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About the Book

Freeze drying, also known as lyophilization, is a process of preserving and stabilizing a wide range of products through the removal of water. This technique has been used for over a century and is a popular method for preserving food, pharmaceuticals, and other products that are sensitive to heat or prolonged storage. Freeze drying is a process that involves freezing the product, reducing the surrounding air pressure, and then heating the product to allow the frozen water to sublimate, or transition directly from a solid to a gas, leaving behind a dry and stable product. The concept of freeze drying can be traced back to 1890 when Arsene d'Arsonval, a French scientist, first discovered the principles behind this process. However, the first successful commercial application of freeze drying was not until the 1930s by a team of scientists from the United States Department of Agriculture (USDA), who used it to preserve blood serum during World War II. Since then, the application of freeze drying has expanded, and it is now widely used not only in the food and pharmaceutical industries but also in fields such as biotechnology, archaeology, and conservation. The freeze drying process starts with the preparation of the product to be dried. This can involve cutting fruits or vegetables into small pieces, grinding pharmaceuticals into powder, or extracting water from biological samples. The product is then placed on trays or in containers and frozen at very low temperatures (usually between -50 to -80 degrees Celsius). This freezing step is crucial as it allows the water present in the product to solidify, making it easier to remove. After the product is frozen, the surrounding air pressure is reduced in a chamber through a process called primary drying. This reduction in pressure creates a vacuum that enables the frozen water to sublimate. At the same time, heat is applied to the product, causing the frozen water to turn into vapor, and then removed by a vacuum pump.


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Product Details
  • ISBN-13: 9798328909914
  • Publisher: Amazon Digital Services LLC - Kdp
  • Publisher Imprint: Independently Published
  • Height: 216 mm
  • No of Pages: 40
  • Spine Width: 2 mm
  • Weight: 59 gr
  • ISBN-10: 832890991X
  • Publisher Date: 19 Jun 2024
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Guideline on benefit of freeze drying for emergency food storage
  • Width: 140 mm


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Drying technology: Guideline on benefit of freeze drying for emergency food storage
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