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Design a cylinder rapid mixer for a water treatment plant with a peak flow rate of 45,000 m³/d. The

velocity gradient G in the mixer is to be at least 2,000 s¹ and the detention time is at least 12 s. Determine

the size of the mixing tank, the power input, and the rotational speed of the mixer.

Assume:

H (mix basin height) =D (tank diameter)

D, (impeller diameter): D=0.65

Np=7.1

D=H=1.53 m; Power = 315 W; D-0.574 m; n = 3.84 rps

OD=H=1,43 m; Power = 2315 W; D=0.574 m; n = 1.84 rps

OD=H=2 m; Power = 25000 W; D=1.30 m; n = 0.985 rps

D=H=1.43 m; Power = 2325 W; D=0.274 m; n = 0.84 rps

O D=H=0.43 m; Power = 2315 W; D=1.574 m; n = 1.24 rps

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