| Geothermal Desalination |
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Geothermal desalination is an experimental process under development for the production of fresh water using Heat Energy extracted from underground rocks. Claimed benefits of the process are that it requires less maintenance than Reverse Osmosis membranes and that the primary energy input is from geothermal heat, which is a low-environmental-impact source of energy. About 1995 several entrepreneurs came together with an idea to use geothermal water directly as a source for desalination. The experiment was moved to northern Nevada. It was moderately successful, but was a proof of concept. The developers, Douglas Firestone and Professor Ronald A. Newcomb, have designed a series of prototypes. A total of 5 prototypes and threemodifications proves that with water approaching 210F (99C) for process water and a chill source about 35F (2C) the device, when made full size, would produce about ½ acre foot of water each day, about 160,000gpd. Water concentrations of salts are raised by only 10%, thus, from, say, 35,000ppm to about 38,000ppm, well within the ability of osmoregulators to adjust. EXTERNAL LINKS
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