It seems that the world demand for drinking water, within 2050, will grow by 55%. Many Countries therefore are moving to resolve this problem in advance.
The objective is to operate desalination plants that recover the marine water and to make it through a secure process and efficient drinking at 100%.
Until today these processes were very expensive, so to stimulate more research was instituted the Prize Desal that in 2015 has seen as winner the photovoltaic system to reverse electrodialysis designed by Massachusetts Institute of Technology (MIT) and by the company Jain Irrigation Systems.
The operation is very simple: thanks to the use of solar panels which recharges the batteries of a machine for the electrodialysis, the sea water passes between two electrodes with opposite charge. The salt, which has both positive ions that negative, is dissolved in water and while the electrodes pull out the ions from the water, is released that sweet; finally, the ultraviolet rays disinfected it.
Thanks to this process it’s possible to recover the 90% of the water and not only is removed the salt but also the limestone, chemicals substances, pesticides, microorganisms etc.
The award was assigned to this technology because it’s able to demonstrate that it’s possible to reduce considerably the costs purifying in just 24 hours well 7.950 liters of water.
It’s good to protect a precious resource as water, making more sustainable our habits respecting the environment avoiding considerable wastes.