Dyeing Wastewater Treatment
Decolorization and COD removal from textile dyeing effluent. Handles reactive, disperse, and acid dyes with combined coagulation-flocculation process.
PAM for Textile Dyeing Wastewater
Textile dyeing wastewater contains high color, TSS, and heavy metals. PAM reduces treatment costs and improves color removal by 70-90%. We supply textile-grade PAM to dye houses across Southeast Asia.
How PAM Works
Color & TSS Removal
APAM at 3-8 ppm after coagulation removes 70-90% of color and 85-95% of TSS. Settling time reduces from 3-4 hours to 45-60 minutes.
- Molecular weight: 12-18 million Da
- Hydrolysis degree: 25-30%
- Target color: <50 Pt-Co
Case Study
Dye House: Effluent color 600→25 Pt-Co, TSS 380→22 mg/L, Chromium 8→0.1 mg/L
Product Selection Guide
| Application | Grade | Dosage |
|---|---|---|
| Primary application | APAM/CPAM 12-18M MW | 2-8 ppm |
| Sludge dewatering | CPAM 8-12M MW, 40-60% | 5-12 kg/t DS |
Dosing Tips
- Always jar test first. Application-specific wastewater requires optimization. A 30-minute jar test saves weeks of field trial.
- Prepare fresh solution daily. PAM solution degrades after 24-48 hours. Use chlorine-free water.
- Gentle mixing. High shear breaks polymer chains. Use 30-50 RPM for 5-10 minutes after PAM addition.
- Monitor for overdosing. Too much PAM causes charge reversal — flocs redisperse and turbidity increases.
- Batch consistency matters. We test every batch for MW (±0.5M tolerance) and retain samples for 24 months. If performance varies, it's a supplier problem, not a PAM problem.
Frequently Asked Questions
Why does my PAM performance vary batch to batch?
This is almost always a supplier consistency problem. Trading companies source from whoever is cheapest each month. We are the factory. Every batch is tested for MW and charge density. If you have a performance issue, we can compare your batch against retained samples.
Can I use the same PAM for clarification and dewatering?
Not optimal. Clarification needs APAM (anionic) at low dosage. Dewatering needs CPAM (cationic) at much higher dosage. Using one grade for both is a compromise — you'll either over-dose or under-perform.
What is the shelf life of PAM?
Properly stored (sealed bags, dry warehouse, below 35°C), PAM powder lasts 2-3 years. Once opened, use within 6 months. Emulsion PAM: 6-12 months sealed, 3 months after opening.
Frequently Asked Questions
How do you address the challenge of "intense color from reactive and disperse dyes"?+
What results can I expect for "high cod from sizing agents and auxiliaries"?+
Which products help solve "variable wastewater composition batch to batch"?+
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