Polyaluminium Chloride-Flocculation - Water treatment - KemiraKemira PAX is an effective coagulant for treatment of both drinking water and waste water. See what . Home>Industries & applications>Polyaluminum Chloride.water treatment polyaluminumchloride,POLYALUMINUM CHLORIDE (PAC) - Water Purification .Description. A series of in organic coagulants with varying ranges in three key categories: Al203 concentration, degree of polymerization, and basicity. In many.