Poly Aluminium Chloride (PAC) is a highly efficient, pre-polymerized inorganic coagulant used extensively in water and wastewater treatment. It is a partially neutralized solution of aluminium chloride with a high cationic charge. Compared to traditional alum, PAC offers superior turbidity removal, faster floc formation, a wider effective pH range, and lower sludge production, making it a modern coagulant of choice for many treatment plants.
Key Characteristics & Benefits:
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High Cationic Charge & Efficiency: Highly effective at neutralizing the negative charge of suspended colloidal particles, leading to rapid and dense floc formation even at low dosages.
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Wide Operational pH Range: Performs effectively across a broader pH range (typically 5.0 - 9.0) compared to conventional alum, reducing the need for pH adjustment chemicals.
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Fast Settling & Less Sludge: Produces strong, fast-settling flocs, resulting in clearer effluent and reduced sludge volume.
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Lower Residual Aluminium: Leaves lower concentrations of soluble aluminium in the treated water, improving water quality.
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Works in Low-Temperature Water: Maintains coagulation efficiency better than alum in cold water conditions.
