English
Home > Our News > Product Information > Aluminum Sulfate vs. Poly Aluminium Chloride A Comparative Analysis in Water Treatment
As environmental regulations tighten globally, selecting the right coagulant for water treatment is crucial. Aluminum sulfate and poly aluminium chloride (PAC) are two commonly used inorganic coagulants. This article provides a detailed comparison of both, covering their performance, cost, environmental impact, and industry-specific recommendations.
A conventional coagulant used for decades in water purification.
✅ Pros: Low price, well-established usage
❌ Cons: Higher dosage, narrow pH range, more sludge, less effective in cold water
PAC is a newer, high-efficiency coagulant with enhanced performance and environmental benefits.
✅ Pros: Wide pH range, low dosage, better floc formation, lower sludge
❌ Cons: Slightly higher price, storage requires care
| Feature | Aluminum Sulfate | Poly Aluminium Chloride (PAC) |
|---|---|---|
| Aluminum Content | Low | High |
| Required Dosage | High | Low |
| pH Range | 6.5–7.5 | 5.0–9.0 |
| Cost Efficiency | Lower unit price, higher use | Higher unit price, lower total cost |
| Sludge Volume | Large | Low |
| Water Adaptability | Neutral water | Wide range of water types |
| Environmental Impact | More residual aluminum | More eco-friendly, better effluent quality |
| Application Area | Recommended Coagulant | Reasoning |
|---|---|---|
| Drinking Water | PAC | High purity, low residual aluminum, regulatory compliant |
| Municipal Wastewater | PAC | High adaptability, better organic matter removal |
| Industrial Wastewater | PAC | Effective for high-COD, high-color wastewater (chemical, textile) |
| Rural Small-Scale Systems | Aluminum Sulfate | Lower cost, suitable for stable water quality |
| Food Processing Wastewater | PAC | High clarity requirement and food-grade safety |
| Cement/Paper Industries | Aluminum Sulfate | Focus on cost control over high performance |
Both aluminum sulfate and PAC remain important tools in the water treatment industry.
√ For higher treatment performance and eco-compliance, PAC is the superior choice.
√ For budget-limited projects with predictable water conditions, aluminum sulfate offers good value.
Please contact us for free quotation by form below. We promise the quickest response within 24 hours: