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PAM & PAC for Textile & Dyeing Wastewater

Color removal, COD reduction, and sludge dewatering solutions for textile dyeing effluent — effective across reactive, disperse, and vat dye wastewaters

The Textile Wastewater Challenge

Textile dyeing produces highly colored wastewater with COD ranging from 800-3,000 mg/L. Unfixed dyes (10-15% of total) discharge with effluent, creating visible pollution. Effective treatment requires coagulation followed by flocculation.

Color Removal

PAC coagulates dispersed and sulfur dyes, achieving 90-95% color removal. Combined with PAM for enhanced floc formation and rapid settling.

COD Reduction

PAC + anionic PAM combination reduces COD by 60-80% through coagulation of dissolved organics and suspended dye particles.

Sludge Management

Cationic PAM dewaters the chemical sludge generated from coagulation. Typical cake solids: 25-30% with belt press, reducing disposal costs.

Treatment Approach

1

PAC Coagulation

200-500 ppm PAC at pH 6-8

2

PAM Flocculation

1-5 ppm anionic PAM

3

Sedimentation

Clear supernatant discharge

4

Sludge Dewatering

Cationic PAM + belt press

StageRecommended ProductTypical Dosage
Color & COD RemovalPAC Industrial Grade (Al2O3 27-29%)200-500 mg/L
FlocculationSGFLOC A613 or A608 (Anionic PAM)1-5 mg/L
Sludge DewateringSGFLOC C8040 or C8038 (Cationic PAM)4-8 kg/ton DS

FAQ

PAC or ferric chloride for textile wastewater?
PAC. Ferric chloride leaves residual iron (yellow tint) and requires stricter pH control (4-5). PAC works at pH 6-8, produces less sludge, and achieves better color removal for reactive and disperse dyes.
Anionic or cationic PAM after PAC?
Anionic PAM (SGFLOC A613 or A608) for post-coagulation flocculation. Cationic PAM (C8040/C8038) for sludge dewatering only. The PAC-created flocs respond best to anionic polymer bridging.
What about reactive dye wastewater?
Reactive dyes are the hardest to remove because they are highly water-soluble. PAC alone achieves 60-80% removal. For higher removal, combine with activated carbon or advanced oxidation before PAC treatment. We can recommend a pretreatment sequence based on your dye types.

Treat Your Textile Effluent Effectively

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