Abstract
This study was conducted on municipal wastewater with an attempt to identify proper treatment measures. The drain under study was observed for three months. In total 45 samples were collected from five different sites at the rate of three samples per day (Morning, Afternoon and Evening). Each sample was a composite of three grab samples collected with four hours intervals. All Samples were analyzed for physico-chemical characteristics. On comparison with Pak NEQS it was observed that the municipal wastewater physicochemical quality was above the permissible limits. A series of coagulation/flocculation treatments were given by applying different doses of ferric chloride in combination of calcium hydroxide. Effective removals of pollutants were obtained by using ferric chloride and calcium hydroxide in ratio of 2:0.5 mL for settling time of 13 minutes. As treatment results, not only removed suspended solids (86%) but a tremendous decrease was observed in color, chemical oxygen demand (COD) and turbidity by 96%, 66% and 89%, respectively
Keyword(s)
Hayatabad, Wastewater, coagulation/flocculation, treatment efficiency