Treatment manner of the ammonia nitrogen content water which

摘要

PURPOSE: To sufficiently remove ammoniacal nitrogen even when the equivalent ratio of an oxidizing agent to be added is low by aerating and removing ammonia gas by the aeration of a treated water after catalytic oxidation decomposition, absorbing the ammonia gas aerated by the aeration to a raw water and treating again. ;CONSTITUTION: When the treated water from a catalyst tower 6 is introduced into a gas-liquid separating tank 9, gaseous nitrogen in the water becomes bubbles to be separated and is collected to a vapor phase. At this time, the ammoniacal nitrogen remained in the water is vaporized as ammonia gas and moved to the gas phase by the bubbling of gaseous nitrogen. The temp. of the treated water is preferably from room temp. to about 180°C to vaporize the ammonia gas from the treated water from the catalyst tower 6 to the vapor phase, and the gaseous mixture separated in the gas-liquid separating vessel 9 is introduced to a raw water tank through a pressure control valve 10 and ammonia gas in the gaseous mixture is absorbed and dissolved in the raw water.;COPYRIGHT: (C)1995,JPO