Abstract: A method of treating water containing a nitrogen compound, and an apparatus of treating water containing a nitrogen compound at high speed without using a biologically unstable treatment causing eutrophication in lakes and swamps. The waste water is introduced into an adsorbing tank that is filled with a zeolite, only nitrogen components are adsorbed by the zeolite, a solution containing hypochlorous acid or hypobromous acid is introduced into the adsorbing tank, and the nitrogen adsorbed in the zeolite is decomposed by the hypochlorous acid or the hypobromous acid.

Abstract: A method of treating a nitrogen compound-containing water, and an apparatus of treating a nitrogen compound-containing water realize such a method and an apparatus of treating nitrogen in a waste water at a high speed without using an unstable biological treatment; the nitrogen being a substance causing eutrophication in lakes and swamps. The waste water containing nitrogen is introduced into an adsorbing tank that is filled with zeolite, only nitrogen components are adsorbed to the zeolite, a solution containing hypochlorous acid or hypobromous acid is introduced into the adsorbing tank, and the nitrogen adsorbed to the zeolite is decomposed by the hypochlorous acid or the hypobromous acid.