OZONE VERSUS OZONE PEROXIDE-INDUCED PARTICLE DESTABILIZATION AND AGGREGATION - A PILOT-STUDY

This research compares the role of ozone and the conjunctive use of oz one plus hydrogen peroxide in particle destabilization and particle ag gregation, and improvement in filtered water quality. Particle destabi lization was observed at all doses of ozone and ozone/peroxide studied , whereas aggregation was observed with ozone only at lower doses (< 2 mg/L) and in conjunction with ozone/peroxide (all doses studied). As compared to alum alone, the ozone-plus-alum and ozone/peroxide-plus-al um treatments provided improved flocculation and better filtered water quality. In addition, each of these preoxidations significantly reduc ed alum requirements. Overall, in terms of particle destabilization an d aggregation; i.e., effectiveness as a coagulation aid, ozone/peroxid e performed better than ozone.