Patent ID: 8864993
Filing Date: 2014-10-21
Classification: C02F,Y02E,Y02W

Abstract:
1. A method of biologically treating wastewater in a wastewater treatment system to remove carbon and ammonium from the wastewater, the method comprising: A. treating the wastewater in a mainstream including: B treating the primary sludge and secondary sludge in a sidestream including: C. after the biomass has been subjected to the reject water and the relatively high ammonium concentration therein, contacting the secondary effluent in the mainstream with the biomass and utilizing the biomass to reduce the ammonium concentration in the secondary effluent; D. after contacting the secondary effluent in the mainstream with the biomass and removing ammonium from the secondary effluent, rejuvenating the biomass by contacting the biomass with the reject water having the relatively high ammonium concentration and relatively high temperature in the sidestream; and E. continuing to alternate contact of the biomass with the secondary effluent and the reject water to: 1. remove ammonium from the secondary effluent in the mainstream; and 2. remove ammonium from the reject water and rejuvenate the biomass in the reject water in the sidestream.