What is poly Aluminium chloride (PAC)?

In the vast field of water treatment, the role of chemicals in ensuring the purity and safety of water cannot be overstated. Among these, poly aluminium chloride (PAC) has emerged as a cornerstone in both potable water and wastewater treatment processes.

Is poly Aluminium chloride a coagulant?

Poly Aluminium Chloride is now a staple coagulant in water and wastewater treatment across the globe, including in the United Kingdom, the United States, France, Canada, China, and Italy. A key feature of Poly Aluminium Chloride is its ability to stably neutralize colloidal particles, setting the stage for efficient coagulation and flocculation.

Why is poly Aluminium chloride used in wastewater treatment?

Coagulation: Poly Aluminium Chloride’s initial role in wastewater treatment is coagulation. As it is introduced into the wastewater, Poly Aluminium Chloride disrupts the electrostatic repulsion among particles, thereby causing them to aggregate.

Does PAC coagulate?

PAC acts primarily as a coagulant, helping in the aggregation of suspended particles into larger clumps that can be easily settled or filtered from water. Is poly aluminium chloride hazardous?

How does poly Aluminium chloride improve water quality?

Poly Aluminium Chloride achieves this by generating hydroxyl ions and polyvalent anionic polymers, which facilitate the coagulation and flocculation of suspended particles to improve water quality. Coagulation: Poly Aluminium Chloride’s initial role in wastewater treatment is coagulation.

Is polyaluminium chloride better than polyelectrolyte – alum-based coagulation?

At the Barekese Water Treatment Plant in Ghana, an alternative, the polyelectrolyte – polyaluminium chloride (PAC) is also used in coagulation but limited information is available on the operating conditions required to achieve better performance than alum-based coagulation.