How can I reduce bromate problem in the drinking water?

[what is DPD4 formula]

Hi everybody!

 

I need your help. Hw can i reduce bromate problem in the drinking water?

 

As you know when we ozonate still water and if our raw water has bromine finally we will face bromate problem.

 

I searched on the internet and found some methods about it. but most of them are not free. Speacially i`m interested in ferric sulfate method. Who knows about it?

 

And you can also tell me other method.

 

Thanks in advance!