Enhanced bromate control during ozonation: the chlorine-ammonia process.

  title={Enhanced bromate control during ozonation: the chlorine-ammonia process.},
  author={Marc-Olivier Buffle and Sonja Galli and Urs von Gunten},
  journal={Environmental science & technology},
  volume={38 19},
Potentially carcinogenic bromate forms during the ozonation of bromide-containing waters. Some water treatment facilities have had to use ammonia addition and pH depression to minimize bromate formation, but these processes may prove to be insufficient to comply with upcoming regulations. The chlorine-ammonia process (Cl2-NH3), consisting of prechlorination followed by ammonia addition priorto ozonation is shown to cause a 4-fold decrease in bromate formed when compared to the ammonia-only… CONTINUE READING