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Membrane regeneration (membrane washing) technology
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Membrane regeneration (membrane washing) technology
Technical explanation
How often should I regenerate (wash) my filters?
In daily operation, the ceramic material paper in the reverse osmosis membrane may be contaminated by suspended solids, microorganisms and minerals. These blockages build up during operation, resulting in reduced pure water output and/or loss of salt rejection percentage. When the output rate of pure water output is 15% lower than the initial output rate (the flow rate determined within 24 to 48 hours of operation) or the salt content in the water rises significantly, the filter membrane should be regenerated (washed). NOTE: If the supply water temperature decreases, the water output rate will decrease (see temperature correction). This is normal and does not indicate membrane fouling.
Is there a need to heat my reverse osmosis membrane cleaner first?
If your cleaning solution is at least 20 degrees Celsius, no pre-heating is required. Also, when your reverse osmosis is running, the temperature will rise further, but the temperature should be kept below 50 degrees Celsius.
What is the correct procedure to follow when regenerating (washing) a filter membrane?
Regeneration (membrane washing) steps:
Step 1. Acid Cleaning
Step 2. Rinse
Step 3. Alkaline Cleaning
Step 4. Rinse
Step 5. Drug disinfection
Step 6. Rinse
What should be the correct flow rate when regenerating (washing) a membrane?
4040 — medium flow 4 — high flow 10
6040 — medium flow 12 — high flow 20
8040 — medium flow 25 — high flow 35
Estimated volume of filter cleaning solution?
V = total number of filters x volume of cleaning solution most suitable for each filter x 5
4040 — 2.5 Gallons
6040 — 4.0 Gallons
8040 — 6.0 Gallons
Which filter regenerant should I use?
The required membrane regenerant depends on the type of membrane fouling. This is very important.
Can I use HCl as a cleaner? What dosage or solution strength should I use?
Yes, you can use HCl. Add the acid to the water very slowly and carefully while stirring (mixing) until you have a pH of 3 (don't go below 2). Use this water and cycle clean.