Surface Overflow Rate (SOR) of a primary settling tank (discrete settling) Is 20000 litre/m2 per day. Kinematic viscosity of water in the tank is 1.01 × 10-2 cm2/s. The specific gravity of the settling particles is 2.64. Acceleration due to gravity is 9.81 m/s2. The minimum diameter (in μm, round off to one decimal place) of the particles that will be removed with 80% efficiency in the tank, is
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