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Pure water membrane operation (maintenance) technology

Product Information

Pure water membrane operation (maintenance) technology

Technical explanation

RO reverse osmosis system maintenance and operation: water output

The water output of the system should be monitored regularly to ensure the normal operation of the filter membrane of the system. Percent recovery is the percentage of feed water that becomes pure water. To check the recovery percentage, calculate the ratio of permeate flow to influent flow (influent flow = permeate flow + concentrate flow).

As follows:
Recovery percentage = (pure water flow rate/influent water flow rate) X 100
Feed water = Permeate water + Concentrate water

Question: If the flow rate of permeate water (pure water) is 10 gallons per minute and the flow rate of concentrate water is 15 gallons per minute, then
Influent water = 10 + 15 = 25 GPM
% Recovery = (10/25) x 100 = 40%

A higher recovery percentage means less concentrated water goes to drain. However, higher recovery percentages may also cause soluble salts to precipitate out of the concentrate water and onto the surface of the membrane.


Benchmark operating techniques for RO and NF reverse osmosis systems

should do
1. Regularly replace pretreatment equipment (such as activated carbon, ion exchange resin).
2. Check and record the pressure status of the reverse osmosis system every day.
3. Run the reverse osmosis system as continuously as possible and try not to shut it down frequently.
4. Make sure to adjust the water recovery efficiency of the reverse osmosis system to the recommended value.

shouldn't do
1. Allow the presence of residual chlorine in the water supply.
2. Shut down the system for a long time.
3. Close the throttle completely.
4. Run the operating system with insufficient water supply flow.

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