Method for degrading organic micropollutants by combining photochemical reaction of nitrate in effluent of sewage treatment plant with hydrogen peroxide

Abstract

The invention discloses a method for degrading organic micropollutants by combining photochemical reaction of nitrate in effluent of a sewage treatment plant with hydrogen peroxide, and relates to the field of water treatment. In order to solve problems that an existing biological treatment process of a sewage treatment plant cannot effectively degrade organic micropollutants and nitrogen-containing by-products can be generated when the organic micropollutants are degraded by using active intermediates generated by photosensitivity of NO3<->, the method comprises the following steps: adding hydrogen peroxide into effluent of the sewage treatment plant and turning on an ultraviolet light source; and keeping a stirring state; the concentration of H2O2 is 0.1 mg / L to 1 mg / L; the nitrate concentration in the effluent of the sewage treatment plant is greater than 5mg / L. According to the invention, green degradation of organic micropollutants widely existing in effluent of a sewage treatment plant at present is realized. The method is applied to the field of water treatment.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for realizing green degradation of new micro-pollutants by utilizing the photochemical reaction of nitrate in the effluent water of a sewage treatment plant combined with hydrogen peroxide. Background technique [0002] With the advancement of detection technology, more and more organic pollutants such as antibiotics, endocrine disruptors, pharmaceuticals and personal care products have been detected in water environment and the detected concentration is usually at a lower concentration level (between ng / L-μg / L). Organic micro-pollutants are discharged into the environment along with human production and living behaviors, and then migrate to sewage treatment plants and achieve a certain degree of enrichment. Although the biotransformation of organic pollutants caused by the co-metabolism of ammonia oxidizing bacteria occurs in the process of denitrification through nitrif...

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