| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance nitrogen-removing efficiency of denitrification treatment for liquid to be treated, which contains at least ammonia nitrogen. <P>SOLUTION: The system 1 for treating the liquid to be treated, which contains ammonia nitrogen, to remove nitrogen therefrom using anammox reaction controls the pH value of the liquid to be treated with a pH adjusting agent containing phosphorus. The system 1 for treating the liquid containing ammonia nitrogen includes a partial nitrifying tank 2, a pH controlling tank 3, and an anammox reaction tank 4. In the pH controlling tank 3, an inorganic carbon component is injected to the liquid to be treated on the basis of nitrite nitrogen concentration of the liquid to be treated, which is introduced to the pH controlling tank 3, and further, the pH adjusting agent containing phosphorus is injected to the liquid to be treated on the basis of inorganic carbon concentration of the liquid to be treated in the pH controlling tank 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
