“…Several studies have evaluated the performance of treatment plants by comparing the removal efficiency of parameters such as Biological Oxygen Demand (BOD 5 ), Total Kedjhal Nitrogen (TKN), Total Suspended Solids (TSS), Total Phosphorus (TP), Total Coliform (TC), Faecal Coliform (FC) and Salmonella with design standards which usually assume steady-state conditions. Nonetheless, only few studies have compared the removal efficiency of wastewater quality parameters to standards set by the local regulatory body as well as evaluating the performance of treatment plants (Mara, 1996;Oliveira & Sperling, 2006;Owusu-Ansah et al, 2015).…”