what happens to the ammonia in chloroamines after disinfection?

[IgorFelipe]

I understand that there are some benifits in using chloroamines for disinfecting wastewater. I know that during disinfection, the chlorine is converted to chloride. I also understand that during break point chlorination the ammonia is converted to nitrates and then to nitrogen gas. What I wonder is what happens to the ammonia during the disinfection reaction before break point chlorination is reached. Is it converted to nitrate? I would very much appreciate your comments and references on this subject. Thanks.
Igor

 

[bimr]

Monochloramine is persistent in the environment. It hydrolyses slowly in aqueous solutions.

Two groups of bacteria (ammonia- and nitrite-oxidizing bacteria) commonly found in terrestrial and aquatic environments
eventually oxidize ammonia into nitrite and nitrate sequentially.

http://www.who.int/water_sanitation_health/dwq/chemicals/en/monochloramine.pdf

 

[IgorFelipe]

Thanks bimr for your answer and reference. I thought that monochloroamine was toxic to bacteria and hence its disinfecting power ! ...but if starved, they'll eat anything! Thanks again.