How are detergents removed in sewage treatment for agricultural reuse?

[tj00889]

Hey Guys,
I was wondering in Sewage treatment plants ,how are detergents (Bleach and such )generally dealt with ,especially if the treated output is expected to be used in agricultural applications and such .
Thank You

 

[Baluncore]

I was told that detergents come in two different forms, cationic and anionic.
If you mix the two different types they will neutralise each other.

Also, the detergents in the system react with the sewage to form water soluble compounds.
Detergents are not catalysts, they are consumed.