Patent ID: 7972513

Claim:
A process for treating nitrogenous wastewater, comprising the steps of: providing a reactor with liquid for a variety of microorganisms to mixedly grow therein; and introducing said nitrogenous wastewater into the reactor and discharging effluent from the reactor; wherein a nitrification reaction, an autotrophic denitrification reaction, a heterotrophic denitrification reaction and a COD removal reaction simultaneously and mixedly take place in the reactor; wherein said microorganisms contain nitrifying bacteria, autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria, the nitrification reaction caused by the nitrifying bacteria in which ammonium is oxidized into nitrite, the autotrophic denitrification reaction caused by the autotrophic denitrifying bacteria in which ammonium used as electron donor and nitrite used as electron acceptor are converted into nitrogen gas and nitrate, the heterotrophic denitrification reaction caused by the heterotrophic denitrifying bacteria in which nitrate and COD are consumed; wherein the autotrophic denitrifying bacteria causing the autotrophic denitrification reaction is deposited to the Korean Collection for Type Cultures under Deposit No. KCTC 11551BP; wherein nitrifying bacteria, autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria uniformly grow in the reactor, and the nitrification reaction, the autotrophic denitrification reaction, the heterotrophic denitrification reaction and the COD removal reaction also uniformly take place.