Fig. 4
Removal of a 2-MIB and b BCIE shown as a function of pre-ozonation dosages. The removal efficiency of pre-ozonation alone was compared with a combined treatment process (i.e., pre-ozonation followed by coagulation, sedimentation, and sand filtration). Odorant removal in pre-ozonation alone with a zero dosage was due to the application of powdered activated carbon (10 mg L−1) at the intake of the source water (i.e., a pre-treatment process for the WTP)