Comparative assessment of bromate control options

Various bromate control options were assessed through an intensive pilot te sting program, performed with a four-cell bubble contactor, and focused on intermediate ozonation of conventionally-treated sand-filtered water. Both acid addition and ammonia addition independently provided good bromate redu ction, with their combinational addition providing no further reduction. On a CT basis, the use of a static mixer did not increase bromate formation, while staged ozonation enhanced bromate formation over single stage applica tion.