Does polyaluminum chloride affect drinking water quality?

Residual chloride will be present, but at low levels that do not adversely affect drinking water quality. 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.

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.

What are the disadvantages of poly aluminum chloride?

One possible disadvantage in using Poly Aluminium Chloride (PAC) is that its cost is roughly twice/thrice that of Alum (roughly the cost of PAC-$0.4/ Kg). Another disadvantage relates to the removal of dissolved organic carbon (DOC) from water.

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.

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.

What are the disadvantages of alum coagulant?

Water Practice and Technology 1 October 2021; 16 (4): 1215–1223. doi: Alum, the predominant coagulant in conventional drinking water treatment schemes, has various disadvantages including the production of large volumes of sludge, lowering water pH (requiring pH adjustment using lime), limited coagulation pH range of 6.5 to 8.0, etc.