Polyamine Coagulant for Oily Wastewater Pretreatment Before DAF
Product Overview
Oily wastewater may contain free oil, mechanically dispersed oil or chemically stabilized emulsions. Polyamine can assist charge neutralization in some systems, but it should not be described as a universal demulsifier. The correct program depends on oil type, surfactants, salinity, temperature and upstream cleaners.
Suitable for controlled trials ahead of DAF after free-oil removal. Stable emulsions may require a dedicated demulsifier, followed by PAC, pH adjustment and PAM according to jar-test results.
Application Advantages
- Can destabilize charged oil-associated colloids and fine solids.
- Supports floc formation and bubble attachment before DAF.
- May complement a dedicated demulsifier or inorganic coagulant.
- Liquid dosing enables rapid adjustment during variable wash cycles.
Typical Product Information
| Item | Typical information |
| Product family | BLU AM series liquid cationic polyamine |
| Appearance | Clear to light-colored liquid; confirm selected grade |
| Ionic character | Cationic |
| Typical solids range | 30-50%, depending on grade |
| Solubility | Water soluble |
| Function | Primary coagulant, coagulant aid and charge neutralizer |
| Packaging | Common options: 25 L drum, 200 L drum or 1000 L IBC |
Note: Values above describe the BLU AM product family. The final specification, viscosity, pH, shelf life and packaging must follow the selected grade's current TDS, SDS, COA and quotation.
Recommended Treatment Approach
First identify free, dispersed and emulsified oil fractions. Compare polyamine alone, demulsifier plus polyamine, and demulsifier plus PAC programs. Add PAM only after emulsion destabilization is visible. Confirm flotation with representative DAF recycle conditions.
Dosage Optimization
Measure oil and grease, TSS, turbidity, COD and float quality. A visually clear sample can still contain dissolved or finely dispersed hydrocarbons, so analytical confirmation is required.
Handling and Storage
Use corrosion-compatible metering equipment and prevent contamination between chemical tanks. If dilution is required, add product to clean water with moderate agitation and verify solution stability before continuous use. Keep containers sealed and follow the grade-specific SDS and TDS for personal protection, storage temperature and spill response.
Frequently Asked Questions
Is polyamine a demulsifier?
It can aid destabilization of some charged emulsions, but it is not universally effective. A purpose-designed demulsifier may be required.
Should free oil be removed first?
Yes. Skimming or oil-water separation reduces chemical demand and keeps recoverable oil out of the chemical sludge.
Can it treat refinery wastewater?
It can be screened for selected pretreatment duties, but refinery streams differ greatly and may contain hazardous or dissolved contaminants requiring additional processes.
Suggested Image Alt Text
- Polyamine coagulant for oily wastewater before DAF
- Oily effluent jar test with polyamine and demulsifier
- Cationic polymer pretreatment for oil water separation
Information for Product Selection
For a useful sample recommendation, provide the industry and wastewater source, pH, temperature, turbidity or TSS, color or COD where relevant, current chemicals and doses, treatment flow, separator type, sludge issue and required outlet quality. Bluwat can then shortlist suitable BLU AM grades for comparative testing.