Like all coagulants PAC performs by extracting after which you can clumping with each other dissolved, colloidal and suspended make a difference. The ensuing floc is then trapped over the filter. ACH is helpful in removing suspended particles, organic matter, and colloidal substances from water. It types smaller sized flocs https://www.tjcyindustrialchem.com/news/what-is-poly-aluminium-chloride.html