Patent ID: 6875355

Claim:
A method for denitrification of nitrified wastewater or nitrified water comprising the steps of: providing a series of interconnected tanks, each tank having an inlet, an outlet, and a conduit connecting said outlet of a preceding tank to said inlet of a succeeding tank; providing to an inlet of a mixing tank of said series of interconnected tanks, said nitrified wastewater or nitrified water having nitrates and nitrites; mixing a detergent with said wastewater or said nitrified water in said mixing tank to enhance the reduction of said nitrates and nitrites to gaseous nitrous oxide (N 2 O) and nitrogen (N 2 ); controlling the amount of detergent introduced into said mixing tank in accordance with the flow volume of said nitrified water entering said mixing tank; and feeding effluent from said mixing tank to at least one detention tank in said series of interconnected tanks for establishing a detention period of said effluent.