Polyamine for color and turbidity removal is the go-to technology for textile dye houses and paper mills. Where conventional coagulants fail against deep dye colour and fine colloidal particles, cationic polyamine delivers fast, predictable decolorisation and clarity — vital for discharge compliance.

What Is Polyamine and Why It Decolorises

Polyamine is a cationic, water-soluble organic polymer with a high positive charge density. Dye molecules, lignin residues and paper-fibre fines carry a negative surface charge that keeps them suspended as stable colloids. Polyamine neutralises these charges, allowing particles to aggregate into flocs that settle or float for removal — a process known as charge neutralisation and bridging.

Why Mills Are Turning to Polyamine

• Colour removal that actually works. Effective against reactive and disperse dyes that resist inorganic coagulants.
• Complementary to PAC. Used with PAC in a dual system, polyamine stretches performance and lowers total dose.
• Faster settling. Dense flocs cut clarifier load and improve effluent clarity.
• Regulatory win. Helps meet color and COD limits in Ecuador's tightening environmental rules.

How to Build a Color-Removal Programme

Step 1 — Assess the Dye Load

Measure colour (Pt-Co or ADMI), COD, pH and suspended solids. Because dye chemistries differ, jar testing is essential to find the optimum polyamine charge density.

Step 2 — Design the Dual Dosing Train

Typically dose PAC first for primary coagulation, then polyamine at slow-mix to neutralise residual charge and build flocs. Optimum polyamine dose is often 20–80 ppm, tuned by jar test.

Step 3 — Validate Effluent Quality

Track colour and COD removal daily. Adjust for batch dye changes and seasonal water shifts to keep effluent stable and compliant.

Frequently Asked Questions

Conclusion

Stubborn colour and turbidity no longer have to threaten your licence to operate. A well-designed PAC-polyamine programme delivers clear, compliant effluent for textile and paper mills alike. Contact us for a jar-test and dosing recommendation.