Polyelectrolyte for sludge dewatering
Cationic polymer conditions sludge so it dewaters faster and the cake comes out drier.
Sunfloc Cationic HQ for regular plant use, or Cationic MQ for smaller plants and trials. Mineral or alum sludge may respond better to an anionic grade. Confirm on your own sample with a free jar test.
The job
Biological and organic sludges carry a negative charge and hold water. A cationic polymer neutralises and binds the solids into robust flocs that release water on a belt press, centrifuge or filter press. The result is higher cake dryness and better throughput.
Choosing a grade
Sunfloc Cationic HQ is the high molecular weight grade with a recommended working concentration of 4 g/L and a maximum use concentration of 10 g/L. Sunfloc Cationic MQ comes in 10 kg bags with a working pH range of 4 to 9, suited to smaller plants and trials.
Getting the dose right
Sludge dose is set per tonne of dry solids and varies a lot between sludges, so we do not publish a universal figure. Send a sample of your sludge and we will run the conditioning trial and recommend the grade and dose.
- Dose the polymer to the sludge line after the sludge has been pumped, so the flocs are formed close to the press.
- Use gentle mixing: over-shearing breaks the flocs and loses the benefit.
- Fresh, fully dissolved solution works best; make it up daily.
Where this work clusters
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.