Reverse osmosis is the most sophisticated membrane liquid separation technology. It can block all soluble salts and organic matter with a molecular weight greater than 100, but allows water molecules to pass through. The desalination rate of cellulose acetate reverse osmosis membrane is generally greater than 95%, and the desalination rate of reverse osmosis composite membrane is generally greater than 98%. They are widely used in seawater and brackish water desalination, boiler feed water, industrial pure water and electronic grade ultrapure water preparation, drinking pure water production, wastewater treatment and special separation processes. Using reverse osmosis before ion exchange can greatly reduce operating costs and wastewater discharge. The operating pressure of the reverse osmosis membrane is generally greater than 5bar when the inlet water is brackish water, and is generally less than 84bar when the inlet water is seawater.

Advantages of reverse osmosis membrane technology

1. At standard room temperature, physical methods are used to desalinate and purify raw water. At present, my country's sewage treatment plants are using ultra-thin composite membrane elements. Although the delay rate has not reached 100%, it can reach 99%, which has a good removal effect.

2. In the general water treatment process, water pressure is used as the overall power, and there will not be too much energy loss.

3. Without the need to use too many chemical agents, chemical wastewater will not be produced, and there will be no threat to the environment.

4. This reverse osmosis device can not only produce water uninterruptedly, but also ensure the stability of the system.

5. The workload of operation and maintenance and equipment maintenance is very small.

6. The equipment occupies a small area and requires little space.