This invention relates to method to dispose nitrogen-containing sewage, concretely speaking, a method for biological nitrogen removal of coking sewage. It solves the technological problems of long technique flow, large area possessed, great foundation establishment investment and high operation cost in current coking sewage disposal procedures. The coking sewage nitrogen removal is that, nitrification and denitrification reactions take place in an SBR reactor, where zeolite powders (with a molecular formula of Na2OAl2O3xSiO2H2O, a pore-sized of 4 and 200 meshes) are added and constrained aeration is adopted to enhance the nitrogen removal effect of the SBR reactor. The ammonia and nitrogen content in outlet water reaches national class 1 and class 2 sewage discharge standard. It is mainly applicable in biological ammonia and nitrogen removal of coking sewage. |