Maria Telkes, in 1920, when she was only twenty years old, she invented a system of solar distillation that can make sea water drinkable. The system planned to pour salt water into a special container covered with a transparent glass sheet, which was to be exposed to the sun, so the sun’s rays could carry out his own water purified.
A graduated Italian student, Gabriele Diamanti, also has patented a similar system called solar desalination. This device can generate about 5 liters of fresh water per day. The system is called Eliodomestico and is similar to a moka coffee machine upside down, where the upper part is filled with salt water, which evaporates with solar energy and is pushed towards the bottom of the furnace through a capacitor to be then collected with a plate that is extracted from the bottom. Several families, especially for countries in trouble, they can then have access to fresh water where before was not possible.
Finale, the University of Delf, in the Netherlands, has succeeded in a similar intent. Everything is based on the technology of windmills, In practice collect sea water and exerting a pressure of 60 bar releasing salt, making water drinkable.
Maybe one day, in the world, there will be no more problems about drinkable water.