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Company cases about Paper printing and dyeing effluent treatment solution

Paper printing and dyeing effluent treatment solution

2026-03-31

As a China-based water treatment chemicals supplier with 10 years of experience, we realize that printing and dyeing wastewater has very distinct characteristics:

⚪High COD, BOD, and suspended solids

⚪Persistent color and surfactants

⚪Poor biodegradability

⚪Complex compositions from dyes, inks, resins, thickeners, surfactants

This type of wastewater usually requires a combination of coagulation, flocculation, adsorption, and biological treatment.

Classification of Printing & Dyeing Wastewater

Type	Industries	Main Pollutants	Recommended Chemicals
Textile Dyeing Wastewater	Garment dyeing, weaving factories	Reactive dyes, TSS, COD	PAC + PAM + Activated Carbon + PFS
Digital Printing Wastewater	Inkjet printing, fabric labeling	Organic binders, resins	Cationic PAM + Aluminum Sulfate
Packaging Printing Wastewater	Corrugated box printing, plastic bags	Ink, emulsions, surfactants	PAC + PDADMAC
Screen Printing Wastewater	Paint, pigments, slurry ink	Toxic & organic residues	PAC + PAM + Activated Carbon

Recommended Chemical Process

Stage	Product	Function
Coagulation	PAC / PFS	Turbidity reduction, initial sedimentation
Flocculation	PAM (anionic/cationic)	Settles suspended solids
Decolorization	Activated Carbon / PDADMAC	Adsorbs dyes & organic color
COD Reduction	Glucose / Sodium Acetate	Improves biodegradability

Packaging & Storage

Product	Packaging	Storage Notes
PAC	25kg woven bag	Keep dry & ventilated
PAM	25kg woven bag or kraft bag	Avoid direct sunlight
PFS	25kg woven bag	Store in covered area
Activated Carbon	25-50kg bags	Seal to prevent moisture

Product Usage Guide

⚪PAC solution: 10% stock solution, adjust based on turbidity

⚪PAM needs to be dissolved at 0.1–0.3% concentration

⚪PDADMAC is ideal for dye-loaded effluents

⚪Use multi-layer filtration with activated carbon for efficient decolorization

See our PAC & PAM video demonstration on YouTube: How PAC + PAM Work on Dyeing Wastewater

Client Case Studies

Region	Type	Issue	Chemical Solution
Bangladesh	Textile Dyeing	>300 Pt-Co color, high COD	PAC + PAM + AC reduced 85% color
Croatia	Digital Printing	Sludge does not settle	Cationic PAM improved floc density
Peru	Packaging Printer	Ink waste difficult to treat	PAC + PDADMAC + AC passed standard

FAQ – Printing & Dyeing Wastewater Chemicals

Q1: What’s the best decolorizing agent for dye wastewater?
A1: PAC or PFS paired with PDADMAC are highly recommended.

Q2: Which type of PAM should I use?
A2: Cationic PAM is preferred for anionic dyes; jar test suggested for optimal results.

Q3: How often should activated carbon be replaced?
A3: Granular carbon: 3–6 months depending on surface load and COD value.

Q4: Why use sodium acetate or glucose?
A4: To boost biodegradability by providing additional carbon sources.

⚪How to Optimize PAC & PAM in Dyeing Effluent Treatment

⚪Best Practices for Activated Carbon Application in Wastewater

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