For treating dairy factory wastewater, the best-suited cationic flocculants are typically cationic polyacrylamides (CPAM) with low to medium cationic charge and medium to high molecular weight. These are selected based on their ability to effectively bind with the negatively charged organic particles such as proteins, fats, and suspended solids in dairy effluents.

✅ Recommended Types of Cationic Flocculants for Dairy Factories:

1. Cationic Polyacrylamide Emulsion (CPAM Emulsion)

• Form: Liquid emulsion

• Cationic charge: 10–40%

• Molecular weight: 5–12 million Da (typically medium to high)

• Advantages:

  • Fast dissolution in water

  • Effective in DAF (Dissolved Air Flotation) systems

  • Suitable for automatic dosing

2. Cationic Polyacrylamide Powder (CPAM Powder)

• Form: Dry powder

• Cationic charge: 10–40%

• Molecular weight: Medium to high

• Advantages:

  • More stable for long-term storage

  • Cost-effective for large-scale operations

  • Requires proper dissolution system before dosing

3. PolyDADMAC (Polydiallyldimethylammonium chloride)

• Form: Liquid

• Charge density: Very high (>60%), but used at low dosages

• Role: Often used as a coagulant aid before flocculation step

• Caution: Overuse can lead to poor floc formation

4. Polyamine

• Form: Liquid

• Cationic charge: Moderate

• Use: Works well when combined with CPAM for enhanced floc size and dewatering