| abstract |
The invention relates to a process for reducing nitrogen pollution in effluents with a high concentration of ammoniacal nitrogen, such as slurry, characterized in that the effluent to be treated is successively subjected to a biological denitrification operation in anoxia, then to a biological nitrification operation carried out by aeration of the effluent, and in that, during these two operations, the nitrate concentration is maintained at high values, preferably at values greater than or equal to 1 g / l. |