Patent ID: 6582596
Filing Date: 2003-06-24
Classification: C02F,C12M,Y02E

Abstract:
A nitrogen removal bioreactor apparatus comprising:(a) an anoxic denitrification bioreactor having a liquid inlet, a liquid outlet and a gas outlet and comprising a microbial consortia which reduces nitrogen oxides to nitrogen gas; (b) an aerobic nitrification bioreactor having an inlet and an outlet and comprising a microbial consortia which oxidizes ammonia to nitrogen oxides; (c) means for connecting the outlet of the denitrification bioreactor to the inlet of the nitrification bioreactor for transferring liquid from the denitrification bioreactor to the nitrification bioreactor; and (d) means for recycling at least a portion of effluent from the outlet of the nitrification bioreactor to the inlet of the denitrification bioreactor.