What is polyaluminium chloride used for?

Polyaluminium chloride is used as a primary coagulant in the treatment of drinking water. It is effective over a range of pH values. It is particularly effective on some waters and usually requires a lower dose than alum.

Why is polyaluminium chloride important during water treatment process?

Polyaluminium chloride has several features important during water treatment process, and the features are outlined in the following list:- PAC helps speeding up the process of flocs formation, and the settling of the flocs at the bottom. The process makes flocs that are formed easier to be filtered out.

Is polyaluminium chloride a safe coagulant?

Polyaluminium Chloride is a safer alternative to several other chemical coagulants. For instance, aluminium sulphate has been widely used as coagulant for many years. It removes contaminates and general turbidity from water during the water treatment process.

When did polyaluminum chloride become a drinking water treatment chemical?

Polyaluminum chloride was endorsed by the NHMRC for use as a drinking water treatment chemical in 1979. The revision undertaken in 2003 did not change the status of this chemical for the treatment of drinking water. ANSI (American National Standards Institute)/AWWA (American Water and Wastewater Association) Standard no B408-98.

How does poly Aluminium chloride work?

Poly Aluminium Chloride is a highly efficient water treatment chemical where it works as a coagulant to extract and clump together contaminants, colloidal and suspended matter. This results in the formation of floc (flocculation) for removal via filters. The below image showing coagulation in action illustrates this process.

How effective is polyaluminium chloride?

It is effective over a range of pH values. It is particularly effective on some waters and usually requires a lower dose than alum. Polyaluminium chloride (PACl), ext {Al}_ {2}ext { (OH)}_ {3}ext {Cl}_ {3} Al2(OH)3Cl3, is also known as aluminium hydroxy chloride or basic aluminium chloride.