Polyaluminum Chloride (PAC) is one of the most efficient water treatment chemicals utilized today. It is widely used in both potable water and wastewater treatment because it provides high coagulation efficiency and it has the widest pH and temperature application ranges compared to other water treatment chemicals. This high efficiency provides for increased plant capacity and lower operating costs. PAC has very little effect on pH resulting in minimized need for pH adjustment chemicals, thus further reducing operating costs. PAC is used in the papermaking industry to increase drainage rates in neutral and alkaline processes, as a retention aid, to increase sizing efficiency and to reduce cationic demand.
Polyaluminium chloride(aluminium chlorohydrate) is used in deodorants and as a coagulant in water purification. This compound is preferred in some cases because of its high charge, which makes it more effective at destabilizing and removing suspended materials than other aluminium salts.
Advantages Of Using PAC
Highly effective coagulant.
Require less amount compared to alum in water treatment.
Produces less sludge when used.
Very versatile. It has numerous areas of application.
Having lower corrosivity makes it easy to store, transport, and use.
Flocks formed are easy to filter. They fast to form and settle.
It’s cheaper to use compared to aluminum sulfate.
The quality of water treated using aluminum sulfate is higher.
It can be used in water with varying pH levels (5-9).
Reduces basicity in water.
Tests concluded that there are fewer salts in water treated with PAC.
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