Patent ID: 7438813
Filing Date: 2008-10-21
Classification: C02F,Y02W

Abstract:
1. In a biological wastewater treatment system having at least an influent pipe passing raw influent into a first solid separator having a raw influent liquid output portion feeding into a first biological reactor having an output portion being passed into an anaerobic sludge digester having a digested output being passed to a second solid separator, a method for removing ammonia content from waste streams with a high ammonium-nitrogen concentration, comprising the steps of: providing a second biological reactor; bringing from said second solid separator an influent flow, selected from the group consisting of supernatant and centrate, into said second biological reactor; transferring nitrite-laden effluent from the second biological reactor to said wastewater treatment system influent pipe; denitrifying the nitrite-laden effluent within the wastewater treatment system influent pipe; tapping off a formed nitrogen gas from the wastewater treatment system influent pipe.