Over the past decades, a flocculation and/or sedimentation process have been adopted
to remove pollutants from CSOs. It has been learned that major factors affecting
settlement of pollutants are the particle size distribution, their settling velocities
and their specific gravity. It is, therefore, a good idea to analyze the particle size
distribution and settleability of CSOs pollutants in order to develop details in
designing a process. Discussed in this study are pollutant characteristics of CSOs such
as particle size distribution and settleability of pollutants. The power law function
is applied and is found to be an effective and reliable index for expressing the
particle size distribution of pollutants in CSOs. Based on the regression analysis it
is observed that the derived constants of curves representing settling velocity profile
are proportional to the initial concentration of particles and to the β-values of
power law distributions.
