Vegetable Dryers (PA Technology)

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Last modified by Franz Schreier on 2014-12-16. This is a wiki so please feel free to update information by clicking on "Edit with form". | Printable version

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Name of technology example:		Type
Vegetable Dryers		☐ Energy Efficiency ☑ Renewable Energy ☑ Alternative Methodology

Description	Food drying is a way to preserve fruit, vegetables, and animal proteins after harvest, that has been practiced since antiquity,[1] and a food dehydrator refers to a device that removes moisture from food to aid in its preservation. A food dehydrator uses a heat source and air flow to reduce the water content of foods. The water content of food is usually very high, typically 80% to 95% for various fruits and vegetables and 50% to 75% for various meats. Removing moisture from food restrains various bacteria from growing and spoiling food. Further, removing moisture from food dramatically reduces the weight of the food. Thus, food dehydrators are used to preserve and extend the shelf life of various foods. Source: http://en.wikipedia.org/wiki/Food_dehydrator A solar or electric food dehydrator can greatly speed the drying process and ensure more consistent results. Water is usually removed by evaporation (air drying, sun drying, smoking or wind drying) but, in the case of freeze-drying, food is first frozen and pressure is reduce to a level that sublimation will take place then the water is removed. Bacteria, yeasts and molds need the water in the food to grow, and drying effectively prevents them from surviving in the food.
Technology for the Application of	☑ Solar ☐ Biomass ☐ Biofuel ☐ Biogas ☐ Wind ☐ Geo-Thermal ☐ Hydro ☐ Energy Efficiency ☑ Other: Any renewable heat source
Primarily Relevant for the following Agricultural Value Chain Steps	☐ Mechanization ☐ Efficiency of Operation ☑ Processing ☐ Transportation ☐ Controlled Atmosphere ☐ Controlled Temperature ☐ Mechanical Sorting ☑ Preservation ☐ Other: /
Primarily Relevant for the following Agricultural Value Chain Activities	☐ Grinding ☐ Hauling and conveying ☐ Sorting ☐ Seedbed Preparation ☐ Milling ☐ Tearing ☐ Planting ☐ Washing ☐ Mixing ☐ Pumping ☐ Heating ☑ Drying ☐ Irrigation ☐ Cooling ☐ Animal feeding ☐ Fertilizing ☐ Venting ☐ Animal health and Welfare ☐ Pest Management ☐ Lighting ☐ Packing and branding ☐ Cutting ☐ Sanitation ☐ Other: /
Primarily Implemented in the following Commodity Groups	☑ Cereals ☑ Fruits and vegetables ☑ Nuts and berries ☐ Forage ☐ Dairy products ☑ Meat products ☐ Oil Seeds ☑ Roots and Tubers ☐ Eggs ☑ Pulses ☐ Fiber Crops ☐ Forestry ☐ Sugars ☑ Stimulants ☑ Spices ☐ Other: /
Region & Country of Development	Region ☐ Africa ☐ South Asia ☐ East Asia & The Pacific ☐ Europe & Central Asia ☐ Latin America & The Caribbean ☑ Middle East & North Africa ☐ North America ☐ N/A: /
Region & Country of Current Deployment	Worldwide ☑ Africa ☑ South Asia ☑ East Asia & The Pacific ☑ Europe & Central Asia ☑ Latin America & The Caribbean ☑ Middle East & North Africa ☑ North America ☐ N/A: /
Region & Country of Potential Deployment	Worldwide ☑ Africa ☑ South Asia ☑ East Asia & The Pacific ☑ Europe & Central Asia ☑ Latin America & The Caribbean ☑ Middle East & North Africa ☑ North America ☐ N/A: /
Manufacturers	N/A
Economics
Technology Development Level
Required Maintenance Technical Level
Required Infrastructure for Deployment
Required Resources during manufacture
Required Resources during operation
Deployment Level
Deployment Capability and Potential
Requirements for Deployment
Relevance for Autonomy and Food Security
Environment Impacts (emissions)
Conformity with Bio- Cybernetic System Rules
Additional information / Comments	No comments.
Internal Reference
Additional Links	http://en.wikipedia.org/wiki/Food_dehydrator http://www.nda.agric.za/docs/solar/solardrying.htm http://www.malnutrition.org/solar-flex.php http://www.fao.org/docrep/V5030E/V5030E0b.htm http://www.unido.org/fileadmin/user_media/Publications/Pub_free/Small_scale_fruit_and_vegetable_processing_and_products.pdf http://www.villageearth.org/pages/sourcebook/crop-drying-preservation-and-storage http://www.alternative-technologie.de/Solarer_Trockner/solarer_trockner.html http://www.fao.org/docrep/003/X3996E/x3996e42.htm http://madryer.info/solar-vegetable-dryer/ https://practicalaction.org/small-scale-drying-technologies https://practicalaction.org/drying-answers/page:1

"Renewable Energy, Alternative Methodology" is not in the list (Energy Efficiency, Renewable Energy, Alternative Methodology) of allowed values for the "PAT Type" property.