Reducing Pollutants in Wastewater by Coagulation and Flocculation as a Pre-Treatment Process for Environment Protection

Abstract

Wastewater treatment is an urgent necessity to reduce environmental pollution resulting from it and preserve water resources. There are various techniques in wastewater treatment, one of which is chemical pretreatment to reduce pollutants in wastewater.  Alum, lime, and ferrous sulfate heptahydrate were used as coagulants for wastewater during the coagulation and flocculation processes. The wastewater properties were studied after removing the causes of turbidity from the suspended materials to determine the extent of reducing various pollutants through the parameters BOD, COD, TSS, phosphate, Turbidity, O&G and NH4+, then compared with their values before coagulation and flocculation. It has been proven through this study that the process of coagulation and flocculation as a pre-treatment process has an effective role in reducing pollutants in wastewater.