The Mini Mec utilizes a natural process of osmosis for which a more diluted solution passes spontaneously to a more concentrated solution by means of a semi-permeable membrane. The concept of reverse osmosis is simple, as it suffices to apply a pressure to a concentrated solution superior to the osmotic pressure in order to provoke an inverse flow in respect to the natural one, extracting the dissolved salts from the concentrated solution, that creates a discharge flow; on the opposite part of the membrane we have a low salinity solution.