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Home > Our News > Product Information > Why Basic Aluminum Chloride (BAC) Is More Efficient Than Traditional Coagulants？
As a Chinese manufacturer with 28 years of experience in water treatment chemicals, we supply BAC, PAC, PAM, calcium chloride, ferric salts, and other coagulants to customers worldwide.
Many ask us: “Why does BAC perform better than traditional coagulants?”
Here is a clear and practical explanation based on real industrial applications.
BAC is a high-polymerization, high-basicity inorganic polymer coagulant composed of:
[Al₂(OH)nCl₆−n]m polymerized aluminum complexes
Al₂O₃ content: 30% ± 2
Basicity: 40–85%
Its multi-core polymerized aluminum structure ensures stronger adsorption and faster floc formation.
| Traditional Coagulant | Chemical Formula | Limitations |
|---|---|---|
| Alum (Al₂(SO₄)₃) | Aluminum sulfate | High dosage, slow floc formation, narrow pH range |
| Ferric Chloride (FeCl₃) | Iron chloride | Causes yellow color, strong corrosion |
| Poly Ferric Sulfate (PFS) | Polymerized ferric sulfate | Produces large sludge volume |
| Aluminum Chloride (AlCl₃) | Aluminum chloride | Low basicity, requires high dosage |
Compared to these single-ion coagulants:⭐ BAC offers higher polymerization and stronger adsorption capability.
| Item | BAC | Traditional Coagulants |
|---|---|---|
| Structure | Polymerized aluminum clusters | Single metal ions |
| Dosage | 20–40% lower | Higher |
| Floc formation | Fast and dense | Slow |
| Sludge volume | 20–30% less | Large |
| pH tolerance | Wide (5–9) | Narrow |
| Water color | Clear | Yellowish |
| Corrosion | Low | High |
1. Strong adsorption & bridging capability
2. Lower dosage, reduced cost
3. Faster settling & clearer effluent
4. Minimal impact on pH
5. Reduced sludge volume
Packaging: 25kg bags/1000kg Ton bags
Storage: Keep dry, avoid moisture, keep away from acids/alkalis, avoid sunlight for liquid BAC.
Application Notes
✔ Prepare 5–10% solution
✔ Do not mix BAC and ferric salts at the same dosing point
✔ Best pH: 6–8
✔ Conduct jar tests
Q1. Is BAC more efficient than PAC?
A1 : Yes, especially in high-turbidity or industrial wastewater.
Q2. Can BAC be used for drinking water?
A2 : Yes, if compliant with local regulations.
Q3. Recommended dosage?
A3 : 30–200 mg/L depending on water quality.
Q4. Corrosiveness?
A4 : BAC is far less corrosive than iron salts and is friendly to metal pipes.
Q5. Can BAC be combined with PAM?
A5 : Yes—BAC + anionic PAM is highly effective.
How to store water treatment products correctly?
The difference between PAC, AC, and ALU
How to choose the right coagulant and improve water treatment efficiency?
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