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)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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)
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