AMMONIA REMOVAL APPARATUS AND METHOD

摘要

An apparatus and method for removing ammonia from mining and other industrial wastewaters having a nanofiltration membrane separation system (10) to reject most divalent ions but pass most ammonium and other monovalent ions with the permeate (14) to a water softening system (20) with the effluent (21) to one or more strong acid cation NH3 removal column(s) (30). Alkaline storage tank(s) (40, 50) provide for the regeneration of the NH3 removal column(s) (30). A stripping tower (61) is provided for ammonia (NH4OH) removal.