Industrial RO System Reverse osmosis (RO) is a water purification process in which water is forced through a semi-permeable membrane that removes 90-99% of tap water impurities. The industrial RO system is a highly effective water treatment process to handle the water purification duties for large volumes of water. It is widely used in many industries including pharmaceuticals, manufacturing, labs, food and beverage, oil and gas, correctional institutions, universities, hospitals, hotels and many others.