Method for deeply treating wastewater containing ammonia nitrogen

Abstract

The invention discloses a method for deeply treating wastewater containing ammonia nitrogen. The method includes the following steps that zeolite and solid filter materials form a filter material layer based on a volume ratio of (1-2): (2-1) in a filter tank, biochemical secondary effluent containing the ammonia nitrogen or ammonia nitrogen wastewater containing low chemical oxygen demand (COD) is guided into the filter tank, nitrobacteria or activated sludge is added into the filter tank, a biochemical reaction is performed, and water body is discharged. The method for deeply treating the wastewater containing the ammonia nitrogen has the advantages that the capacity of resistance to ammonia nitrogen impact load is high, a continuous operation is achieved, the biological solid carrying capacity is large, the zeolite filter material can be efficiently bio-regenerated, and the ammonia nitrogen removing effect is stable and the like, and the method can be widely applied to the deep treatment of the wastewater containing ammonia nitrogen.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for advanced treatment of ammonia nitrogen-containing wastewater. Background technique [0002] Due to the development of industry and agriculture, the rapid increase of population and urbanization, a large amount of domestic sewage and industrial wastewater containing ammonia nitrogen are discharged into natural water bodies. Ammonia nitrogen present in water has certain toxic effects on human body and aquatic organisms. In addition to causing black and odorous water quality, high ammonia nitrogen concentration, as an inorganic nutrient, is also an important reason for water eutrophication. For wastewater deamination, the traditional nitrification and denitrification biological deammonization process is the most widely used and most mature biological deammonization process at home and abroad. However, these processes have a high concentration of amm...

AI Technical Summary

Problems solved by technology

However, due to the strong water absorption of zeolite, water will quickly occupy the pores of zeolite, which will reduce the adhesion ability of the biofilm on the surface, and the time for film formation is longer, and the biomass of the immobilized amount is limited; the periodic shedding of the biofilm will cause system failure. Unstable; in the biological aerated filter with single-layer zeolite as filler, the effluent in the later stage has an odor and the color tends to be milky white