3. An air flocculation system is to be designed (T = 20 °C). If a G value of 60 s* is to be used ,estimate the air flowrate that will be necessary for a 200 m³ flocculation chamber. Assume the depth of the flocculation basin is to be 4 m. The viscosity of water @ 20 °C = 0.001 N-s/m?.

Fig: 1