Reverse osmosis technology is a high-tech water treatment technology that relies on the characteristics of reverse osmosis membranes to separate solvents and solutes in a solution under pressure Permeation "is a physical phenomenon, and reverse osmosis is the process of applying greater pressure than natural osmosis to water containing salt and various fine impurities (i.e. raw water), causing the water to reverse osmosis from the high concentration side to the low concentration side. The vast majority of fine impurities, organic matter, heavy metals, bacteria, viruses, and other harmful substances in raw water are discharged through sewage outlets.