Your boss has assigned you the job of designing a rapid-mix tank for the new water treatment plant for the town of Waffle. The design flow rate is 0.050 m^3/s. The average water temperature is 8 degrees celcius. The following design assumptions for a rapid-mix tank have been made:
1. number of tnaks = 1 ( with 1 backup)
2. tank configuration: circular with liquid depth = 1.0 m
3. detention time = 5s
4. velocity gradient = 750 s^-1
5. impeller type: turbine, 6 flat blades, Np = 3.6
6. available impeller diameters: 0.25, 0.50, 1.0m
7. assume B = (1/3)H
Design the rapid-mix system by providing the following:
1. water power input in KW
2. Tank diameters in m
3. Diameter of the impeller in m
4. Rotational speed of impeller in rpm