Owning a desalinator, you know the importance of regular cleaning, flushing or sterilizing of your membranes. Now it may sound like a complicated task, but we are here to help you out with this quite simple procedure. Please note that this procedure can be done on any desalinator brand, as well as on our Enviro Desalinators. 

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STERILISING THE MEMBRANES WITH SODIUM METABISULPHITE

  1. Close the sea intake valve.
  2. Make sure regulator is fully wound out and that the desalinator’s system is depressurised.
  3. Remove the intake hose from the feed pump and attach the length of suction hose.
  4. Remove the reject hose from the regulator assembly and attach the length of supply hose.
  5. Fill a clean 20L-bucket with non-chlorinated water (either use desalinator to fill the bucket or use a charcoal filter).
  6. Add sodium metabisulphite. Dissolve 200g in 20 litres of water. Mix well. (Make sure to wear a particle mask, protective glasses and ventilate the area well).
  7. Place both the inlet and the reject hose in the bucket. We recommend priming the inlet hose and positioning the cleaning bucket higher than feed pump to alleviate the running feed pump from running dry.
  8. Using the switch on your control box, switch to feed pump position.
  9. The system is now in closed circuit and cycling the sterilising solution.
  10. Circulate cleaning solution for approximatively 15 to 30 minutes depending on the fouling level.
  11. If the cleaning fluid in the bucket is highly contaminated, it will turn brown. Empty the bucket and start the procedure all over again until there is no change in the colour of the cleaning fluid.
  12. Once the cleaning process is completed, the cleaning hoses may be disconnected, the intake and reject hoses reattached (make sure to check all hoses clamps for leaks).
  13. If the desalinator system is not to be used for an extended duration, keep the inlet valve closed to prevent the migration of salt water into the system.

CLEANING THE MEMBRANES WITH CITRIC ACID

  1. Follow the same 5 first steps as the sterilisation. 
  2. Add the citric acid and dissolve 400g in 20 litres of water. Mix well.
  3. Place both the inlet and the reject hose in the bucket. We recommend priming the inlet hose and positioning the cleaning bucket higher than feed pump to alleviate the running feed pump from running dry.
  4. Using the switch on your control box, switch to feed pump position.
  5. The system is now in closed circuit and cycling the sterilising solution.
  6. Circulate cleaning solution for approximatively 15 to 30 minutes depending on the fouling level.
  7. If the cleaning fluid in the bucket is highly contaminated, it will turn green. Empty the bucket and start the procedure all over again until there is no change in the colour of the cleaning fluid.
  8. Once the cleaning process is completed, the cleaning hoses may be disconnected, the intake and reject hoses reattached (make sure to check all hoses clamps for leaks).
  9. If the desalinator system is not to be used for an extended duration, keep the inlet valve closed to prevent the migration of salt water into the system.

SAFETY PRECAUTIONS

At all times during the procedure, make sure to wear protective gear and use all the necessary protections
to protect yourself from any potential chemical harm.

Precautions recommended:

– Wear a particle mask

– Wear protective glasses

– Proceed in a well-ventilated area

FIRST AID MEASURES

Find here both SDS sheets for Citric Acid and Sodium Metabisulphite.