Development of a Method of Nitrate Nitrogen Treatment using Catalyst Particles and Reaction Gas

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Abstract

A novel treatment method of nitrate nitrogen in underground water is proposed. Nitrate nitrogen is treated using catalyst particles and reaction gas. A model study is carried out to understand the behavior of bubbles of the reaction gas in the cylindrical reactor. Glass particles are used as the model for catalyst particles. Water and air are chosen as the models for underground water and reaction gas, respectively. The particles are contained in a cylindrical vessel to a prescribed height. A mixture of water and air is introduced into the vessel from the bottom. As a first step, the behavior of air bubbles in the vessel is observed and empirical equations are derived for the mean diameter of bubbles and the number of bubbles in the vessel. Secondly, experiments are carried out to treat nitrate nitrogen in real underground water.

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