An extensive review of drying and driers developed in India during the last 4 to 5 decades was made. Researchers in the period have explored the possibilities of use of alternate energy sources such as solar, wind and biomass for drying/ventilation. During this period a number of dryer/drying techniques have been designed/evolved, developed, perfected, and commercialized. Almost all agricultural materials have been tackled, drying characteristics studied, and operational parameters optimized under laboratory conditions. A number of drying units have been field evaluated. Recently work on osmotic dehydration of fruits and vegetables, has been investigated.
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