Nitrogen removal method of anaerobic digestive leachate

摘要

PURPOSE: A method for eliminating the nitrogen of anaerobic digestion effluent is provided to effectively eliminate nitrogen from the anaerobic digestion effluent and reduce the supply of organic carbon source and air. CONSTITUTION: A method for eliminating the nitrogen of anaerobic digestion effluent includes the following: Anaerobic digestion effluent is introduced into a first anoxic chamber(20). Nitrite and nitrate contained in the effluent are reduced into nitrogen gas. The effluent is introduced into a first aeration chamber(30). Ammonia in the effluent oxidized into nitrite or nitrate. The oxidized amount of the nitrate is more than oxidized amount of the nitrite. The effluent is reintroduced into anoxic chamber and is reduced into nitrogen gas. The effluent is introduced into a second anoxic chamber(70). Nitrate in the effluent is reduced into nitrogen gas. The effluent is introduced into a second aeration chamber(80). Remained ammonia in the effluent is oxidized into nitrate. The effluent is introduced into a settling chamber(50) or a pressurized floating chamber. Sludge is separated from the effluent, and a part of the sludge is transferred to the first anoxic chamber.