Ten common problems in reverse osmosis membrane systems

1. How many years can reverse osmosis membrane components generally last?
The service life of reverse osmosis membrane components depends on the chemical stability of the reverse osmosis membrane, the physical stability and cleanability of the membrane components, the inlet water source, pretreatment, cleaning frequency, and operational management level. Under the premise that the inlet water quality meets the requirements of the membrane component system, the service life of reverse osmosis membrane components can usually reach more than 5 years.
2. What is the separation ability of reverse osmosis membrane technology?
Reverse osmosis membrane technology is currently the most precise liquid filtration technology. Reverse osmosis membranes retain soluble inorganic salt molecules and organic matter with a molecular weight greater than 100. At the same time, water molecules can freely pass through the reverse osmosis membrane, and the typical removal rate of soluble salts is 95-99%.
3. What kind of pretreatment is generally required for reverse osmosis membrane systems?
The typical pre-treatment system consists of coarse filtration (~80 microns) to remove large particles, adding oxidants such as sodium hypochlorite, then precision filtration through a multimedia filter or clarification tank, adding oxidants such as sodium bisulfite to reduce residual chlorine, and finally installing a safety filter before the inlet of the high-pressure pump.
The function of a security filter: As the name suggests, it is an indispensable safety measure to prevent accidental damage of large particles to the impeller and membrane components of the high-pressure pump. Water sources with high levels of particulate suspended solids typically require higher levels of pre-treatment to meet the specified inflow requirements; For water sources with high hardness content, it is recommended to use softening or adding acid and scale inhibitors. For water sources with high microbial and organic content, activated carbon or anti fouling membrane elements are also needed.