Environment-friendly compounded denitrification agent and denitrification method

Abstract

The invention discloses an environment-friendly compounded denitrification agent and a denitrification method, and belongs to the technical field of wastewater denitrification. The environment-friendly compounded denitrification agent is formed by compounding a green surfactant, ethylene glycol deaminase, ferrate and organic carboxylic acid in a certain ratio, wherein the surfactant accounts for 30-70%; ethylene glycol deaminase accounts for 10-20%; ferrate accounts for 5-10%; organic carboxylic acid accounts for 5-30%; hydrogen peroxide accounts for 5-30%. 2-8mg / L of the compounded denitrification agent in the ratio is added into ammonia-nitrogen wastewater, meanwhile the pH value of wastewater is adjusted to 7.0-10.5, and a stage aeration method is adopted for aeration blowoff based on concentration of residual ammonia-nitrogen in wastewater. The environment-friendly compounded denitrification agent is applicable to treatment on high-concentration ammonia-nitrogen and organic nitrogen wastewater, the ammonia-nitrogen concentration of wastewater can be reduced to be less than 0.3mg / L, and the environment-friendly compounded denitrification agent has the advantages that the compounded denitrification agent is environment-friendly, is small in use amount, high in denitrification efficiency and the like.

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