Polyaluminum Chloride (PAC)
Polyaluminum chloride is a widely used inorganic coagulant for drinking water, municipal wastewater, and industrial effluent treatment. It destabilizes colloidal particles through charge neutralization and sweep flocculation, producing large, dense flocs that settle rapidly. PAC is effective over a broad pH range and produces less sludge volume than conventional alum.
Technical Specifications
| density | 1.12–1.25 g/cm³ (liquid) |
| basicity | 70–90% |
| appearance | Yellow to light brown liquid or white powder |
| Al₂O₃content | 10–30% |
| pH (1% solution) | 3.5–5.0 |
Applications
- Drinking water clarification
- Municipal wastewater treatment
- Industrial effluent treatment
- Paper and board manufacturing
- Dye wastewater decolorization
Key Features
- Effective over wide pH range (5–9)
- Rapid, dense floc formation for fast settling
- Lower sludge volume than aluminum sulfate
- Suitable for both potable and industrial water treatment
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