Patent ID: 7491331
Filing Date: 2009-02-17
Classification: C02F,Y02W

Abstract:
1. A method for removing a nitrogenous contaminant from water, comprising: providing a system having an inlet for introduction of water comprising a nitrogenous contaminant and a nitrification reactor in fluid communication with a denitrification reactor; introducing water via the inlet to the system, for flow through the nitrification and denitrification reactors; introducing oxygen gas to the nitrification reactor, to establish in the nitrification reactor a biofilm comprised of nitrifying bacteria capable of oxidizing the nitrogenous contaminant to form an oxidized contaminant; introducing hydrogen gas to the denitrification reactor, to establish a biofilm comprised of denitrifying bacteria capable of reducing the oxidized contaminant; and controlling the amount of oxygen gas introduced to the nitrification reactor to promote reduction of the oxidized contaminant in the denitrification reactor.