Effect of thermal and physicochemical treatment on abattoir waste water – A case study of Ikpoba-hill abattoir

Abstract

Evacuation of abattoir waste waters into water bodies results in excessive proliferation of decomposers, thus causing oxygen depletion and eutrophication. This study is designed to find means of effectively treating the abattoir waste water before they are reused or discharged into water bodies. The waste water was taken from open drainage before it discharges into Ikpoba river water body and subjected to physicochemical and thermal treatment prior to adsorption by granulated activated charcoal (GAC). The waste water and treated water were analysed for chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total nitrogen (TN), ammonium nitrogen, total phosphate (TP), total solid content (TSC), dissolved solid content (DSC), suspended solid and pH to ascertain the removal efficiency of the treatment procedure. The study revealed that the removal efficiency using a combination of adsorption, physicochemical and thermal treatment in treating waste water from an abattoir was most efficient for total phosphate (95.78%) and least efficient for dissolved solid content (64.80%).

Keywords: Heat, Coagulant, Adsorption, Treatment, Abattoir, Wastewater.