Reverse osmosis is a membrane separation operation that uses pressure difference as a driving force to separate solvent from solution. When pressure is applied to the feed liquid on one side of the membrane, when the pressure exceeds its osmotic pressure, the solvent will reversely penetrate in the opposite direction of natural osmosis. There are many things to pay attention to in the steps before and after the installation of the reverse osmosis membrane element. Let's take a look at the installation steps and precautions.
Nanofiltration membrane is also called ultra-low pressure reverse osmosis membrane. The membrane with a molecular weight cutoff of 200-1000 and a NaCl retention rate of ≤90% can be considered as a nanofiltration membrane. Nanofiltration membrane separation technology has been separated from reverse osmosis technology and has become an independent separation technology between ultrafiltration and reverse osmosis technology.
