Polymer for apartment and commercial STPs
How sewage treatment plants in apartments, offices and hotels use polyelectrolyte, and how to buy the right quantity.
Sunfloc Cationic HQ for regular plant use, or Cationic MQ for smaller plants and trials. Confirm on your own sample with a free jar test.
Where polymer is used
Mainly at sludge dewatering, before the filter press, screw press or bag filter, and sometimes in the tertiary clarifier.
Which charge
Sewage sludge is biological, so cationic grades are the usual choice: Cationic HQ or Cationic MQ.
How much
Small STPs use little polymer. A 10 kg MQ bag suits many apartment plants; larger plants use 25 kg HQ bags.
Making it up
Dissolve in clean water, mix gently for 45–60 minutes, and use within a day.
Getting it right
Ask your operator to run a simple jar or sieve test, or send us a sludge sample.
Related
Polyelectrolyte dosing guide
Starting doses, solution strength and how to work out kilograms per day.
Read →Not sure which grade suits your water?
Send us a one-litre sample or describe your process. We test it in our lab free of charge and recommend a grade and starting dose, and quote within 1 business hour.