Composite denitrification agent for treating medium concentration ammonia nitrogen wastewater and denitrification method

Abstract

The invention discloses a composite denitrifier for treating medium concentration ammonia nitrogen wastewater and a denitrification method. The composite denitrifier is compounded by organic matter and inorganic matter, wherein the organic matter consists of organic ketone, a surfactant and a macromolecular polymer, wherein the organic ketone accounts for 10 to 60 percent; the surfactant accounts for 10 to 60 percent; the macromolecular polymer accounts for 10 to 60 percent; the inorganic matter accounts for 10 to 70 percent; the composite denitrifier prepared in proportion is added to the medium concentration ammonia nitrogen wastewater, wherein the addition amount is between 10 and 50 ppm; the PH value of the wastewater is regulated between 7.0 and 13.0; and the wastewater is aerated for 1.0 to 2.0 hours. As long as the composite denitrifier is added to the wastewater, the denitrification can be carried out in an aeration pool or an air stripping tower, and can reduce the medium concentration ammonia nitrogen wastewater from 10,000mg / L to less than 0.5mg / L; and the removing rate reaches as high as 99.99 percent. The composite denitrifier has available raw materials and small dosage; and the denitrification method is simple.

Description

technical field [0001] The invention relates to a compound denitrification agent and a denitrification method for removing ammonia nitrogen in waste water, in particular to treating medium-concentration waste water with an ammonia nitrogen content of 500-10000 mg / L. Background technique [0002] Ammonia nitrogen is an important factor causing eutrophication of water bodies, and the state has repeatedly raised the standards for the discharge of ammonia nitrogen in industrial enterprise wastewater. However, with the expansion of industrial scale and the intensification of human activities, the discharge of domestic sewage and industrial wastewater containing ammonia nitrogen has increased rapidly, resulting in serious deterioration of water quality. Ammonia nitrogen has been used as an important indicator of advanced sewage treatment. At present, the denitrification technologies used in the treatment of ammonia nitrogen wastewater at home and abroad mainly include biochemical ...

AI Technical Summary

Problems solved by technology

However, due to the dissolution equilibrium relationship of ammonia nitrogen in water, when the gas-liquid two-phase ammonia is in equilibrium, the ammonia nitrogen in the water will not be blown off and escaped.

The traditional packing blow-off process also has disadvantages such as low blow-off efficiency, large blow-off air volume, long time, high temperature requirements, easy fouling of packing, and high operating costs.