For optimum performance of spray tower system,
the droplet size of water, dD should be between 500 -
1000μm, (Garba, [8]). Hence, in this work a droplet size of
500μm, 1000μm, 1500μm and 2000 μm has been selected
for the analysis of the scrubber system. Model for terminal
settling velocity of water droplets was derived using onedimensional
motion of water droplet acted upon by
gravity, drag and buoyant forces described by the
equation: