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Desalination / Evaporation

278 bytes added, 23:58, 12 April 2012

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[[Image:SolarDistiller.jpg|thumb|right|300px|Gabriele Diamanti's "Eliodomestico" solar-powered eco-distiller. The small, vat-like still is made entirely from terracotta and zinc-plated metal sheets. It is designed to be produced (and eventually repaired) by local craftsmen.]]

 

Desalination is used to remove salts from brackish or saline surface water and groundwater in order to render it acceptable for human consumption or other uses. Brackish water is defined as starting at having a Total Dissolved Solids content of 1,000 mg/l, and saline water as having 10,000 mg/l. It is increasingly employed to provide drinking-water because of a growing scarcity of fresh water driven by population growth, overexploitation of water resources and climate change. Desalination facilities exist all over the world, particularly in the eastern Mediterranean region, with use increasing on all continents. Small-scale desalination is used to supply fresh water on ships and to provide additional fresh water in some hot and arid regions.

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