OZONE AND THE FORMATION OF BROMATE IN WATER-TREATMENT

The ozonation of water is widely used within the drinking-water indust ry. The improvement of the performance of the Barcombe water-treatment works is envisaged. An ozonation stage and granular activated carbon filtration are being considered as an addition to the existing plant. As part of the investigation work, the influence of ozone on bromate f ormation was studied using a 3 m(3)/h pilot plant. The bromate product ion was found to depend upon (a) the applied ozone dose, (b) the conta ct period, and (c) the pH. Using ozone in an appropriate way will be o f benefit to the treatment process as well as meeting the new World He alth Organization hearth guidelines for drinking water.