ABSTRACT
The researchers considered two separate radii: R1 = 0.31 m and R2 = 0.75 m for LA = ht (tank height) what gave the ratio LA/R equal to 0.90 for R1 and ht1 = 0.28 m, and 1.00 for R2 and ht2 = 0.75 m. Such results indicate that the condition in Equation 1 is not fulfilled and the dispersion model cannot be accepted from the physical point of view. Moreover, Veerapen et.al. (2005) were analyzing fish ponds, where density of suspension ranged from 1060 to 1180 kg/m3, whereas mineral suspension present in storm waste water has the density of circa 2700 kg/m3. With grit density double the value for fish excrements, the centrifugal force may be expected to be greater in magnitude.
