| 摘要 |
The invention relates to a process for removal of ammonium nitrogen from waste water for a useful application using a chemical process based on ion exchange, comprising the following steps: i) as the first step, the adsorption of ammonium nitrogen contained in waste water to an adsorption mass in an ion exchanger; ii) as the second step, the desorption of ammonium nitrogen contained in the adsorption mass of the ion exchanger by means of an eluent solution containing a metal salt of a carboxylic acid, the adsorption mass being at the same time regenerated by the metal ions of said metal salt; iii) as the third step, the clarification of the solution from the second step containing ammonium nitrogen; iv) as the fourth step, the aeration of the clarified solution containing ammonium nitrogen thus liberating ammonium nitrogen as gaseous ammonia, and v) as the fifth step, the absorption of the gaseous ammonia from the fourth step for a useful application. |
