Double stage reverse osmosis, also known as secondary reverse osmosis, refers to the process in which the permeate water from the first stage reverse osmosis is adjusted in pH value and then pumped into the secondary reverse osmosis system for treatment by a secondary high-pressure pump, thereby obtaining permeate water.

Application scope:

Preparation of pure water and ultrapure water in industries such as electronics, industry, pharmaceuticals, and food;

Purification and preparation of water for textile and chemical industries;

Purification and preparation of water for food and beverage, as well as water for brewing processes;

Concentrate and recover useful substances from aqueous solutions in industrial production;

Pre desalination treatment of high-pressure boiler feedwater for power plants and other enterprises;

Desalination of brackish water and seawater.