Fig. 1

A Schematic representation of STWWTP and sampling points (1: Screening, 2: Grit Chamber, 3: Primary Settling, 4: Aeration Tanks, 5: Secondary Clarifier, 6: Tricking Filter, 7: Disinfection Process). * sampling Points.

A Schematic representation of STWWTP and sampling points (1: Screening, 2: Grit Chamber, 3: Primary Settling, 4: Aeration Tanks, 5: Secondary Clarifier, 6: Tricking Filter, 7: Disinfection Process). * sampling Points.