1. a) Your client asked you to design a settling tank with the following type - 1 suspension analysis. The column is 3.5

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1 A Your Client Asked You To Design A Settling Tank With The Following Type 1 Suspension Analysis The Column Is 3 5 1 (79.9 KiB) Viewed 48 times

1. a) Your client asked you to design a settling tank with the following type - 1 suspension analysis. The column is 3.5 m deep, and the initial concentration of the well-mixed sample is 320 mg/L. Results of the analysis are shown below. 0 60 100 140 160 180 200 250 Time (min) Conc. (mg/L) 320 240 190 158 125 98 68 43 What will be the theoretical removal efficiency for the above suspension in a settling basin with a surface area of 400 m² and an inflow of 17,500 m/d. (20 marks) b) If the client has specially requested that the particle size of 0.05 mm with a density of 1.2 g/cm² needs to be fully removed, what is the minimum surface area (m²) you should design? (Gravitational acceleration constant is 9.8 m/s?. Water viscosity and density are 1.0087 g/m's and 1.0 g/cm?, respectively. Assuming a laminar flow condition.) (7 marks) Following equations may be useful. fo F =(1-f.)+ vo 1) t- - ſv, df 0 g Pp-Pd2 = Vs 18 u