What are the conditions of membrane contamination that occurs in purified water equipment?

The main filter element in the purified water equipment reverse osmosis membrane is easily polluted by various types of pollutants brought by raw water, due to the different water quality of water sources in various places, the pollutants that cause the reverse osmosis membrane are not the same, and the speed of pollution is also very different, so how is the phenomenon of membrane pollution in purified water equipment? How can users correctly identify? Let's take a look
.

Purified water equipment reverse osmosis membrane colloidal pollution Whether it is groundwater or surface water, it always contains iron and aluminum colloids, silicon colloids, organic colloids, coagulants added during pretreatment, coagulants such as scale inhibitors, etc.
, which may be deposited on the surface of the membrane, so that the system pressure difference increases, the water production decreases, and the desalination rate decreases
.

Reverse osmosis membrane biocontamination of purified water equipment mainly occurs in surface water treatment systems and operating systems
that frequently start and stop.

A single fungicide can not kill all kinds of microorganisms in the water, microbial growth and reproduction adhere to the surface of the membrane to form a microbial mucosa, so that the system running pressure difference increases, the water yield decreases, desalination is slightly rising, and then falling
.

Chemical scaling of reverse osmosis membrane of purified water equipment Scaling often occurs in the second stage, which is precipitated by excessive dissolved salt in concentrated water and scaled, which is manifested by an increase in the pressure drop of the original section, a decrease in the desalination rate, and a decrease in
output.

As long as the recovery rate and the amount of scale inhibitor added can be controlled
.

Membrane performance has a great impact on the water production effect of pure water equipment, pollution will cause the membrane performance to decline, so when pollution occurs, it is necessary to find out the pollution situation, and take effective cleaning measures to clean in time to restore membrane performance
.