Membrane Cleaning Tips
Effective membrane cleaning involves proper procedures merged with chemistry which is designed unpick the mark foulant. One but without the other may end up in ineffective cleaning.
Use proper chemical dilutions
When diluting cleaners, remember to consider amount of water within the system including: tanks, pipes and/or hoses and vessels. Table 1 gives a self-help guide to membrane vessel volumes.
Use proper flow rates
The speed for the solution down the membrane surface is essential. Clean 4″ membranes at Ten to twelve gpm and 8″ membranes at 35 to 40 gpm. Full-fit membranes require higher flow rates, 60 gpm to have 8″ element.
Always clean membranes in parallel
If necessary, separate the vessels to do this. Never clean the vessels in series since it is difficult to ensure proper flow rates and pressures.
Minimize cleaning pressure
Clean at pressures fewer than 60 psig. This should minimize or eliminate foulants being pulled up to the membrane surface by water permeating in the cleaning procedure.
Heat the cleaning solution
Heat to the maximum temperature allowed by the membrane manufacturer.
Additional Tips
Just use DI or RO permeate water to dilute cleaning solutions.
Reduce cleaner foaming by placing return lines beneath the water level inside CIP tank.
Try an education low and high pH cleaning solutions.
Recirculate the cleaning solution for not less than 45 minutes.
RO Membrane cleaning service ? Ever wonder what happens to a giant reverse osmosis filter after its been used up? These guys clean them. Watch this video
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