Treating nitrogen containing waste water, comprises providing reactor with liquid for growth of several microorganisms, and introducing nitrogen containing waste water into the reactor and discharging effluent from the reactor

摘要

Treating nitrogen containing waste water comprises: providing a reactor (10) with a liquid for the growth of several microorganisms; and introducing the nitrogen containing waste water into the reactor and discharging effluent from the reactor. A nitrification reaction, an autotrophic denitrification reaction, a heterotrophic denitrification reaction, and a chemical oxygen demand (COD) removal reaction are simultaneously carried out in the reactor. The microorganisms comprise nitrifying bacteria, autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria. Treating nitrogen containing waste water comprises: providing a reactor (10) with a liquid for the growth of several microorganisms; and introducing the nitrogen containing waste water into the reactor and discharging effluent from the reactor. A nitrification reaction, an autotrophic denitrification reaction, a heterotrophic denitrification reaction, and a chemical oxygen demand (COD) removal reaction are simultaneously carried out in the reactor. The microorganisms comprise nitrifying bacteria, autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria. The ammonium is oxidized into nitrite in the nitrification reaction, which is caused by the nitrifying bacteria. The ammonium acts as an electron donor and nitrite acts as an electron acceptor, and the ammonium and the nitrite are converted into nitrogen gas and nitrate, in the autotrophic denitrification reaction, which is caused by the autotrophic denitrifying bacteria. The heterotrophic denitrification reaction removes the nitrate and the COD, which is caused by the heterotrophic denitrifying bacteria.