Environment-friendly compounded denitrification agent and denitrification method

Abstract

The invention discloses an environment-friendly compound denitrification agent and a denitrification method, belonging to the technical field of wastewater denitrification. The present invention adopts green surfactant, ethylene glycol deaminase, ferrate and organic carboxylic acids compounded according to a certain proportion, wherein surfactant accounts for 30-70%, and ethylene glycol deaminase accounts for 10- 20%, ferrate 5-10%, organic carboxylic acids 5-30%, hydrogen peroxide 5-30%. Add the compound denitrification agent in the above ratio to the ammonia nitrogen wastewater, the amount added is 2-8mg / L, and adjust the pH of the wastewater to 7.0-10.5 at the same time, according to the residual ammonia nitrogen concentration in the wastewater, adopt the stage aeration method. Aeration blow off. The invention is suitable for the treatment of high-concentration ammonia nitrogen and organic nitrogen wastewater, can reduce the concentration of ammonia nitrogen in the wastewater to below 0.3mg / L, has the advantages of a compound denitrification agent that is environmentally friendly, uses less denitrification agent, and has high denitrification efficiency.

Description

technical field [0001] The invention belongs to the technical field of denitrification of wastewater, and more specifically relates to an environment-friendly compound denitrification agent and a denitrification method. Background technique [0002] With the continuous development of industrial and agricultural production, water pollution (mainly water eutrophication) produced by nitrogen is becoming more and more serious. For this reason, countries have higher and higher requirements for the discharge of wastewater treatment effluent. In addition to strict requirements for organic matter (carbon) and suspended solids, there are also requirements for nitrogen in the treated effluent. Nitrogen exists in several forms: organic nitrogen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, and nitrogen gas. [0003] At present, in industrial wastewater, high-concentration ammonia-nitrogen wastewater is mainly the main pollution source of total nitrogen exceeding the standard....

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of poor ammonia nitrogen treatment effect, low treatment efficiency, non-green and environmentally friendly denitrification agent, large amount of denitrification agent, and poor treatment effect on organic nitrogen in the existing high-concentration ammonia nitrogen wastewater treatment process, the present invention provides an environmental Friendly compound denitrification agent and denitrification method, the new denitrification agent can effectively reduce the ammonia nitrogen in high-concentration ammonia nitrogen wastewater to below 0.3mg / L, and at the same time can recover high-purity ammonia nitrogen non-products, thus achieving environmental benefits Unity with social benefits