Poly Aluminium Chloride (PAC) is a polymer form of aluminium chloride that provides far stronger coagulating power than other aluminium or iron salts. PolyAluminium Chloride or PAC is used in a range of water-treatment applications either alone or in conjunction with other chemicals.

 How does it Work?

When PAC is added to dirty water the charged molecule causes ionic attraction between suspended solid particulate. This leads to an increase in particulate size or “Coagulation”. Coagulation is an important process in water treatment as many contaminants are too fine to settle under their own weight alone. Coagulation also has the effect of increasing the reaction surface of contaminants leading to better flocculation when polymers are used in conjunction.

Advantages of Use

Advantages of using PAC in water treatment include increased coagulation, and minimal pH shift. Because of the strong coagulation abilities, very low amounts are needed to achieve the desired effect, making it cost-effective and also safe for potable water applications. Aluminium is bound in a polymer form; so less residual aluminium transfers to clarified water then using Aluminium Sulphate or Alum. Hence it is safer for use in drinking water applications. PAC is considered a non-DG under Australian Chemical Regulations.

Applications

  • Treatment of bore, lake, dam water for individual household supply or commercial supplies

  • Phosphate removal in wastewater processes

  • Removal of Iron in bore water or recycle of effluent

  • Clarification of turbid waters.

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