High ammonia nitrogen wastewater treatment

Abstract

The invention provides a treatment method for ammonia-nitrogen wastewater, which comprises carriers and nitrobacteria. Diffusion resistance is employed to generate oxygen concentration gradient inside particles to form an aerobic area, an anoxic area and an anaerobic area, environment which is suitable for the procedures of nitrification and denitrification is formed inside the carriers, the oxidation reaction of ammonia is performed on the surface of granular sludge due to the existing of oxygen, the denitrification reaction is performed inside the particles by employing oxidation products of the ammonia under the anoxic condition, thereby realizing single stage biodenitrification and simultaneously realizing the nitrification and denitrification, the nitrogen removal rate reaches high, an anaerobic denitrification tank is saved and size thereof is reduced , the process flow of biological nitrogen removal is simplified, and the costs are saved.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating ammonia nitrogen wastewater. Background technique [0002] Excessive discharge of ammonia nitrogen into the water body will lead to eutrophication of the water body, reducing the ornamental value of the water body, and the oxidized nitrate and nitrite will also affect the health of aquatic organisms and even human beings. Therefore, wastewater denitrification treatment has attracted widespread attention. At present, the main denitrification methods include biological nitrification and denitrification, breakpoint chlorination, air stripping and ion exchange, etc., digested sludge dehydration liquid, landfill leachate, wastewater from catalyst production plants, wastewater from meat processing and synthetic ammonia chemical industry Wastewater contains extremely high concentrations of ammonia nitrogen (above 500 mg / L, even several thousand mg / L), and the abo...

AI Technical Summary

Problems solved by technology

[0002] Excessive discharge of ammonia nitrogen into the water body will lead to eutrophication of the water body, reducing the ornamental value of the water body, and the oxidized nitrate and nitrite will also affect the health of aquatic organisms and even human beings. Therefore, wastewater denitrification treatment has attracted widespread attention. At present, the main denitrification methods include biological nitrification and denitrification, breakpoint chlorination, air stripping and ion exchange, etc., digested sludge dehydration liquid, landfill leachate, wastewater from catalyst production plants, wastewater from meat processing and synthetic ammonia chemical industry Wastewater contains extremely high concentrations of ammonia nitrogen (above 500mg / L, even several thousand mg / L), and the above methods will limit their application due to the biological inhibition of free ammonia nitrogen or cost.