Determine the required width of the paddle blade and recommend a motor power (in watts)...

Determine the required width of the paddle blade and recommend a motor power (in watts) and rotational speed (in rpm) for the horizontal shaft a cross-flow paddle flocculator for the first compartment of a three compartment flocculation basin shown in Figure P-3-23. ( Note: there are three paddle wheels on one shaft.) Figure P-3-23 and the following assumptions are to be used in the design:

Liquid volume = 257.2 m³

Velocity gradient = 40 s^–1

Motor efficiency = 80%

Paddle velocity = 0.5 m/s

Water temperature = 15^o C

Drag coefficient = 1.8

No stators are present *