As an engineering technologist, you have been tasked to propose preliminarly the design parameters for the following conventional wastewater treatment technology unit A primary sedimentation unit will receive a flow rate of 833 33 m/h containng06 gn sS Primary sedimentation tanks (PSTS) will be in a parallel configuration The total volume of the unit is approximately 18 ML There are sngle effluent weirs located on the periphery of each tank The selection of the minimum number of PSTS should be based on theoretical design guidelines Consider ratio stilling chamber depth to the theoretical minmum sde water depth as 1 14 and ratio concentration SS to BOD ratio as 151 42 Using data from 4 1, determine efficiency removal of SS and BOD if their concentrations after sedimentation are 0 25 g/l and 0 15 g/l respectively Comment on the results