A rectangular primary sedimentation basin is to be designed for an activated sludge treatment plant serving a municipality. The regulatory agency criteria for primary sedimentation basins used for activated sludge system are as follows: peak overflow rate (S) = 80 m3/d*m2, average overflow rate (S) = 40 m3/d*m2, peak solids loading = 50 kg/d*m2, peak weir loading = 372 m3/m*d. The average flow to the basin is 12 000 m3/d. a) Calculate the tank surface area in m2. b) Calculate the peak flow rate in m3/d. c) Calculate the total suspended solids concentration in the incoming flow to the basin (mg/L) d) Calculate the total weir length (m)

A rectangular primary sedimentation basin is to be designed for an activated sludge treatment plant serving a municipality. The regulatory agency criteria for primary sedimentation basins used for activated sludge system are as follows: peak overflow rate (S) = 80 m³/d*m², average overflow rate (S) = 40 m³/d*m², peak solids loading = 50 kg/d*m², peak weir loading = 372 m³/m*d. The average flow to the basin is 12 000 m³/d.

a) Calculate the tank surface area in m².

b) Calculate the peak flow rate in m³/d.

c) Calculate the total suspended solids concentration in the incoming flow to the basin (mg/L)

d) Calculate the total weir length (m)