Ozone Dosage - Because ozone is more reactive with NOM and inorganics than hydrogen peroxide, the amount of ozone applied must be greater than that estimated from stoichiometry. Care must be exercised in choosing the appropriate ozone dosage because too much ozone will result in the scavenging of hydroxyl radicals.
Hydrogen Peroxide Dosage - As mentioned above, excess hydrogen peroxide can scavenge hydroxyl radicals so it is important to avoid excess dosages. H2O2 dosages required for the O3/H2O2 are less than those required for the UV/H2O2 but care should be taken to optimize H2O2 dosage at the lowest appropriate level to minimize the amount of H2O2 residual.
Bromate Formation - Processes involving ozonation can produce bromate when bromide ion is present in the raw water. Trussell Tech can provide guidance on appropriate strategies to control bromate formation when the O3/H2O2 process is applied.