What is the role of reverse osmosis membrane in water treatment equipment?

FROM：本站   DATE：2025-07-14

Reverse osmosis technology, abbreviated as RO, is a membrane separation technology that uses a semi permeable membrane to achieve solvent and solute separation under pressure. The principle of this technology is that when the pressure applied in the system is greater than the osmotic pressure of the inlet solution, water molecules will continuously pass through the membrane, while impurities in the water such as ions, organic matter, bacteria, viruses, etc. are trapped on the inlet side of the membrane, thus achieving the purpose of separation and purification.

The mechanism of action of reverse osmosis membrane

Separation and purification function: Reverse osmosis membranes allow water molecules to pass through through through their selective permeability, while retaining impurities in water such as ions, organic matter, bacteria, and viruses.

Desalination effect: Reverse osmosis equipment can effectively block soluble salts and organic matter with a molecular weight greater than 100, while allowing water molecules to pass through. The desalination rate is usually greater than 98%.

High precision filtration: The filtration accuracy of reverse osmosis membrane is extremely high, reaching 0.0001um, effectively removing soluble solids, organic matter, colloidal substances and bacteria in water.

Application Fields of Reverse Osmosis Membrane

Production of purified drinking water: Reverse osmosis technology is widely used in the production of purified drinking water to ensure its purity and safety.

Industrial pure water preparation: In industries such as electronics, chemical, power, and pharmaceuticals, reverse osmosis technology is used to prepare high-purity industrial water.

Boiler feedwater: Reverse osmosis technology can remove hardness components from water, prevent boiler scaling, and improve thermal efficiency.

Wastewater treatment: In industrial wastewater treatment, reverse osmosis technology is used to remove harmful substances from wastewater and achieve its reuse.

Composition of reverse osmosis equipment

Reverse osmosis water treatment equipment usually consists of the following parts:

Raw water pretreatment system: The purpose is to make the raw water meet the inlet requirements of the reverse osmosis membrane separation component and ensure the stable operation of the system.

Reverse osmosis purification system: The core part applies pressure to the raw water through a high-pressure pump to separate water molecules from impurities.

Ultra purification post-treatment system: further removes trace ions, organic matter and other impurities remaining in reverse osmosis pure water to meet the water quality requirements for specific purposes.

The advantages of reverse osmosis technology

Efficiency: Reverse osmosis technology can remove over 98% of ions, organic matter, and 100% of microorganisms (theoretically) from raw water in one go.

Economy: Compared with traditional water treatment methods, reverse osmosis technology has lower operating and maintenance costs.

Environmental friendliness: Reverse osmosis technology reduces the use of chemical treatment agents and lowers the impact on the environment.

Why do we need such highly clean water sources?

Because from daily life to cutting-edge scientific research, the demand for water quality in every aspect is extremely demanding. When drinking, we need to ensure health and safety, while in the electronics or pharmaceutical industries, it is to maintain the high precision of the production process and the stability of product quality.