How to choose reverse osmosis membrane in water treatment equipment

Reverse osmosis (RO) water treatment needs to be designed and produced according to raw water quality and water yield. Therefore, when selecting the reverse osmosis membrane elements of reverse osmosis water treatment equipment, they should also be selected according to these conditions.

When designing RO water treatment, how do we choose the membrane model and specifications? This is essential for the normal and efficient operation of RO water treatment, otherwise the efficient operation of the reverse osmosis system will not be guaranteed.

1. Select the membrane model according to the water quality of the membrane:

When the influent water TDS is less than or equal to 1000ppm, the ultra-low pressure membrane element can be used for influent;

When the influent water is 3000ppm≥TDS≥1000ppm, the anti-pollution membrane element can be used for water inflow;

When the influent water TDS≥3000ppm, the brackish water desalination membrane element can be selected;

When influent water TDS≥5000ppm, seawater desalination membrane element can be selected;

2. Select the RO membrane element according to the water production (consider whether to choose a large RO membrane or a small RO membrane):

4040 reverse osmosis membrane, the first 40 means the RO membrane element diameter is 4.0 inches; the second 40 means the RO membrane element length is 40 inches; the 8040 reverse osmosis membrane the first 80 means the RO membrane element diameter is 8.0 inches; the second 40 means the RO membrane element length is 40 inch.

General situation: 4040 RO membrane elements are mostly used for reverse osmosis equipment with water production less than 4T/H; for 0.25 tons/hour reverse osmosis water treatment equipment, choose 4040 membrane for 1, 0.5 tons/hour for two, and 1 ton/hour for reverse osmosis 4. Root, and so on.

8040 membrane elements are mostly used for reverse osmosis equipment with water production ≥ 4T/H. 8040 membrane element is about 1 ton/hour, 4 ton/hour reverse osmosis equipment chooses 4 8040 membrane elements.