The desalination rate of the RO reverse osmosis membrane element is determined when it is manufactured and formed. The desalination rate depends on the density of the ultra-thin desalination layer on the surface of the reverse osmosis RO membrane element. The denser the desalination layer, the higher the desalination rate and the greater the water production. low. The desalination rate of different substances by reverse osmosis membrane is mainly determined by the structure and molecular weight of the substance. The desalination rate of high-valent ions and complex monovalent ions can exceed 99%, and the desalination rate of monovalent ions such as sodium ion, potassium ion and chloride ion is slightly less. Low, but it can also exceed 98% (the longer the reverse osmosis membrane is used, the more the number of chemical cleanings, the lower the salt rejection rate of the reverse osmosis membrane). The removal rate of organic matter with a molecular weight greater than 100 can also exceed 98%. The removal rate of organic matter with molecular weight less than 100 is low.
