ETP treatment stages and where polymer fits
A walk through a typical industrial effluent plant, stage by stage, and which Sun Brand polymer does the work at each one.
1. Equalisation and pH correction
Effluent is mixed to even out its strength, then brought into the right pH range for treatment. Polymer comes later; pH sets it up to work.
2. Coagulation
A metal-salt coagulant, or a liquid cationic polymer such as SunMac SC04, neutralises the charge on suspended and colloidal matter.
3. Colour removal
Where dissolved dye is present, a decolorant such as SunDec SC05 binds it into insoluble particles that leave with the floc.
4. Flocculation and primary clarification
A Sunfloc grade bridges small flocs into large ones that settle fast in the primary clarifier.
5. Biological treatment
Bacteria remove dissolved organics. Solids carried over from the primary stage upset this step, which is one reason good flocculation matters.
6. Sludge dewatering
Primary and biological sludge is conditioned with a cationic grade, Cationic HQ or Cationic MQ, ahead of the press or centrifuge.
Related
Polyelectrolyte dosing guide
Starting doses, solution strength and how to work out kilograms per day.
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