Effect of Scale Inhibitor on Reverse Osmosis Membrane Components

Reverse osmosis technology is one of the mature desalination technologies in water treatment. In combination with the actual situation and the needs of different water users, a reverse osmosis water treatment system with different processes is formed during the design and use.


If the process design is not perfect, improper operation or the addition of chemicals cannot be compatible with water, etc., the water production and water quality of the reverse osmosis system will be reduced, and even the reverse osmosis membrane components will be seriously damaged. Therefore, the protection of reverse osmosis membrane elements is particularly important throughout the design and operation of the system.

The reverse osmosis process is a physical desalination technique. Use the natural penetration phenomenon to exert an osmotic pressure greater than the original water. The molecular separation is carried out by a selectively permeable semipermeable membrane, raw water-insoluble and most of the salts and water.

As fresh water continues to permeate through the membrane, salts and insoluble materials gradually concentrate, and as the concentration factor increases, some insoluble salts may foul. In order to prevent such fouling from occurring, an anti-scaling dispersant is added to the reverse osmosis water to suppress scale formation. Therefore, choosing a good compatibility and a good scale inhibitor selection process is an important issue.

Reverse osmosis scale inhibitors are specially developed for reverse osmosis systems. An effective scale inhibitor prevents fouling of insoluble substances or salts in the water on the surface of the membrane, thereby increasing water production and water quality systems and reducing operating costs.

Reverse osmosis is currently one of the most recognized technologies for the manufacture of desalinated water. Today, power, coal chemical, coking and refining, seawater desalination, food, cosmetics, and other aspects have been unable to break away from reverse osmosis technology.

Reverse osmosis technology is a membrane separation technology, and a roll film is currently widely used. During the operation of the equipment, it is easy to cause biological and chemical pollution of the membrane, which leads to an increase in the water supply pressure and cleaning frequency of the system, a decrease in the water output or the salt rejection rate, and even the membrane element is scrapped in advance in severe cases.

In order to ensure the economical, safe and smooth operation of the RO system, in addition to the reliable design of the device and the selection of components and perfect operation management, it is very important to select the appropriate anti-osmosis membrane special agent to prevent or mitigate pollution.

Commonly used agents for reverse osmosis equipment include scale inhibitors, bactericides, cleaning agents, and scale inhibitors. As the name implies, their main function is to prevent or slow the formation of inorganic scale on the surface of the RO membrane. In combination with the use of fungicides to reduce biofouling, the use of reducing the number of front-end chemicals, reducing the frequency of cleaning, reducing cleaning input, and reducing energy consumption are achieved. Really practical to save costs for the enterprise.

Characteristics of Reverse Osmosis Agents

Within the large concentration range of effective control of inorganic pollution.
Does not form insoluble materials with iron-aluminum oxides and silicon compounds.
Effectively inhibits the polymerization and deposition of silicon.
It is used in a wide range of applications, including reverse osmosis CA and TFC membranes, nanofiltration membranes and ultrafiltration membranes.
Excellent solubility and stability.
The pH value in the water supply range is 5-10.

The control of the dosage in actual use should also be accurate. The larger the dosage is, the better the effect will be. The large dosage will cause fouling of the original membrane.

In order to truly reduce the use of front-end chemicals, reduce cleaning frequency, reduce cleaning input, reduce energy consumption, etc., the actual cost savings for enterprises.

A reverse osmosis scale inhibitor product with stable quality, reliable performance, complete certification, and follow-up service is indispensable, which can bring unexpected benefits to customers during the user’s use.