Does reverse osmosis have any requirements for the quality of the incoming water? Will it have any impact on the membrane?
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Update time : 2025-05-21 16:50:16
Reverse osmosis is a pure water treatment technology that uses reverse osmosis membrane elements to improve the purity of water and remove impurities and salts in the water. Reverse osmosis equipment has a wide range of applications, so reverse osmosis equipment has certain requirements for the quality of the incoming water.
The requirements of reverse osmosis equipment for influent water quality are as follows:
1. The temperature condition of reverse osmosis equipment is usually between 1 and 45℃
2. pH=4-7
3. Residual chlorine content <0-1mg/L
4. Iron content (mg/L): when dissolved oxygen>5mg/L, Fe<0.05
5. Organic matter content (COD) <3mg/L
6. Turbidity (NTU) <1.0
7. Silt density index (SDI value) <5
8. SO₄2⁻=100-1000mg/L
9. Hardness between 10-250mg/L
If one or more of the above indicators do not meet the standards, the reverse osmosis membrane will be affected as follows:
1. The RO reverse osmosis membrane will be contaminated by metal oxides.
2. Colloid contamination.
3. Suspended matter blocks the RO reverse osmosis membrane device.
4. Scale formation occurs in the RO reverse osmosis membrane.
This will have a significant impact on the entire reverse osmosis device:
1. Reduce the overall water output of the reverse osmosis pure water system.
2. Affect the water quality of the reverse osmosis pure water system.
3. Increase the overall operating cost of the reverse osmosis equipment, including reverse osmosis scale inhibitors, resin regeneration salts, and other water treatment chemicals.
