(Solved):   Questions 1 & 2 A circular sedimentation basin is being designed for wastewater treatment ...

 

Questions 1 & 2 A circular sedimentation basin is being designed for wastewater treatment plant serving a town of 180,000 capita design population and average wastewater generation rate of 420 L/cap.d. Using the stated below design parameters and assuming standard basin dimensions to fit mechanisms made in diameters with increments of 1.0 m and in-depth increments of 0.5 m. value Parameter unit 4 Number of basins 36 Surface loading rate m³/m².d 2 Hydraulic retention time at average flow hr Detention time in the feed well 20 min Depth of feed well/tank depth 60 % 1. (3 points) Determine the tank depth and diameter (3 points) A. Diameter of 24 m and depth of 3.5 m. B. Diameter of 25 m and depth of 3.0 m C. Diameter of 26 m and depth of 3.0 m D. Diameter of 28 m and depth of 3.0 m 2. (3 points) Determine the diameter of the feed well (3 points) A. 14 m B. 16 m C. 13 m D. 15 m