After 120 min of treatment, SS were reduced at an average percentage
of 80% (from 37 to 7 mg L1) in the case of experiments
carried out with 20 and 35 mg L1 of ozone. When 50 mg L1 of
O3 was applied, this value decreased to slightly above 20% and even
lower values (7%) were obtained for the run completed with
10 mg L1 of ozone. In parallel with SS, DS increased at the expense
of SS removal (i.e. for the run conducted with 20 mg L1 of ozone
DS changed from 343 to 380 mg L1). It seems that ozone is capable
of converting some of the organics/inorganic molecules present
in particulates into soluble compounds.