Drinking water from the Earth.
The largest seawater desalination 70s provided by the thermal energy of two nuclear reactors that are able to produce was a day of more than 0.5 million m3 of drinking water, at a cost of one cubic meter at 12 cents. Another source of fresh water, located just a few hundred kilometers north of the desalination plant could provide the same amount of fresh water half the price. This is a geothermal area in the Imperial Valley. Although the hot underground water in the area such as salty as sea water, and even have a higher salt content, they are characterized by two decisive advantages. First, they provide the heat needed for evaporation, in connection with which there is no need to build a nuclear power plant or thermal power plants. Secondly, the waste water to the constructed area desalination plant will be no problems returning to a huge underground reservoir. Moreover, the thermal energy produced water is not wasted because it will be returned to the source.
Experts expect that a typical geothermal area, California desalination complex provide an output of fresh water to 80% of the recycled water mixture. Daily production is 0.5 million m3 of fresh water, and perhaps more. In addition, as a byproduct in the day will be generated 25 million kilowatt hours of electricity. There is a calculation to build the complex, even if it is found that in order to prevent sedimentation of the soil loss of underground water would have to compensate by pumping it from other sources (sea water, waste water for agriculture).
Exploitation of geothermal sources is beneficial in economic terms, from whatever side we saw her no. In cases where priority will be given to the production of electricity, does not lose sight of opportunities as a byproduct of cheap fresh water.