PAC, PAM and Water Decoloring Agent Combination Guide
How to combine water decoloring agent with PAC and PAM for color removal, coagulation, flocculation and settling. This guide explains the role of each chemical so buyers can send better wastewater information and reduce trial-and-error.
Different chemicals solve different problems
| Chemical | Main role | Typical sign it is needed |
|---|---|---|
| Water Decoloring Agent | Targets visible dye color and color-causing pollutants. | Water remains strongly colored after treatment. |
| PAC | Coagulates suspended solids and colloids. | Water is turbid or flocs need stronger formation. |
| PAM | Bridges flocs and improves settling / sludge separation. | Flocs are small, loose or settling is slow. |
Suggested jar-test comparison
Decoloring agent only. Check color removal and initial floc formation.
Decoloring agent + PAC. Check color, turbidity and settling.
Decoloring agent + PAC + PAM. Check final clarity and sludge separation.
Common dosing order
A common test order is: adjust pH → add decoloring agent → stir → add PAC → stir → add PAM → slow mix → settle. However, some wastewater performs better with a different order. Do not copy dosage from another factory without testing.
Combination FAQ
Should decoloring agent be added before PAC or after PAC?
The best order depends on wastewater. Many tests start with decoloring agent first, then PAC, then PAM, but the sequence should be verified by jar test.
Can PAC replace water decoloring agent?
PAC can coagulate suspended solids, but it may not remove dissolved dye color effectively. For high-color wastewater, a decoloring agent is often needed.
When is PAM needed?
PAM is used when flocs are too small, settling is slow, or sludge-water separation needs improvement.
Related technical pages
Need help selecting the dosage?
Send wastewater source, color, pH, COD, current treatment process and target discharge standard. We can suggest water decoloring agent, PAC and PAM testing direction.