Reverse osmosis is a process wherein a solvent passes through a porous or semipermeable membrane. To make this happen, high pressure is applied to push water through the filters (and the RO membrane). Today, this process is being used the world over to provide potable water for municipal or city use.
With the help of reverse osmosis machines or filters, water passes easily through the membrane, leaving behind the insoluble impurities that makes unfiltered water unsuitable for human consumption. These contaminates include certain bacteria, pathogen, chemical contaminants and industrial waste products, as well as minerals and metals that are dangerous when taken in.
As the water enters the reverse osmosis (RO) system, it will go through a prefilter process that takes care of any of the larger pieces of debris that can be removed without the help of an RO in the first place. This way, the RO membrane can be protected from getting overwhelmed with the amount of debris plunged into it.
Into the Membrane
Now, the water can safely pass into the membrane that traps the rest of the minerals and substances that are too little for the prefiltration process. This is so efficient in fact, that only oxygen and hydrogen molecules can easily pass through it, thus ensuring that what you end up with is water that’s as pure as it can be.