Ammonia (NH3/ NH4+) treatment process

Ammonia (NH3/ NH4+) treatment process Hello everyone I am looking ​for the method ​to treat ​Ammonia ​parameter in ​waste water. ​ it is waste ​water from WC ​and canteen, ​estimating for ​concentration ​about 100 mg/l. ​ please ​suggest some ​tips for me ​ i am really ​appreciate if ​have P&ID ​from  you. ​ thanks so much.