Cs-sfd-Jerky-on-dehydrator.jpg
Beef jerky on Chris's ENGR305 Solar Food Dehydrator.
Food dehydration is both a desirable and appropriate technology for many reasons which include increasing the shelf-life of food without having to use refrigeration, and reducing product size which can maximize storage space. Also, the process of dehydration is used to enhance foodstuffs directly (i.e. jerky, fruit leather) and indirectly (i.e. spices).
The main principle behind food dehydration is simple: to remove an ample quantity, or the majority (depending on the desired product), of water content from food products. Since the water content of foods is high, 80-95% in many fruits/vegetables and 75% or less in meats, the product weighs much less, and its volume is reduced. Also, without water, the food becomes an unfavorable medium for the growth of bacteria or fungi. If dehydrated when ripe, determined from a nutritional standpoint, the maximum quantity of nutrients can be preserved.
Used in: www.appropedia.org/Chris%27s_ENGR305_Solar_Food_Dehydrator
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