The study looked at how adding certain chemicals to wastewater treatment plants can improve the efficiency of removing pollutants. By using coagulants like FeCl3 and Synthetic coagulant LP 526, the levels of harmful substances like COD and TSS were reduced effectively. Some chemicals, like APE 67 and CPE 84, were found to hinder the process. This research shows that using specific coagulants can help make wastewater treatment more effective.