assuming a rectangular shape basin, T=25C=77F for water properties calculation (interpolations) use appendices found online.

A pneumatic flocculation basin is to be designed for a flow of 5 mgd. The design criteria for the basin are as follows (NOTE that P or Power equation is different for pneumatic flocculation, please look it up): Detention time = 5 minutes G= 150 sec Lengh = 2x Width Depth = 10 ft Diffuser depth = 9 ft Air flow = 4 cfm . . Solve for the following: 1. Basin dimensions 2. Total air flow in ft3/min 3. The number of diffusers required