Device and method for removing refractory organics and total nitrogen in waste water simultaneously

Abstract

The invention relates to a device and a method for removing refractory organics and total nitrogen in waste water simultaneously. The device comprises an ozone catalytic oxidation tower (3) and a rear-mounted anoxic biological filtering tank (7). The waste water is subjected to catalytic oxidation firstly in the ozone catalytic oxidation tower (3) and is discharged after entering the anoxic biological filtering tank (7) for the denitrification reaction. According to the device and the method, ozone serves as an oxidizing agent, refractory organic pollutants are oxidized into micro-molecule easily-degradable organics under the effect of a catalyst, and the biodegradability of the waste water is improved; and by the aid of the denitrification reaction of the anoxic biological filtering tank, micro-molecule easily-degradable organics produced by the catalytic oxidation serve as a carbon source, and the nitrate nitrogen in the waste water is eliminated. By the aid of the device and the method, the total nitrogen can be eliminated effectively, the emission of the effluent total nitrogen after treatment can meet the standard, and the special catalyst is used in the method for oxidizing refractory organics, so that pollutants are eliminated, simultaneously, the problem of carbon sources during total nitrogen removal reaction can be solved, external carbon sources are not required, and the operation cost is low.

Description

technical field

[0001] The invention relates to a wastewater advanced treatment technology, in particular to a device and a method for removing refractory organic matter and total nitrogen in the wastewater for advanced wastewater treatment. Background technique

[0002] In order to prevent eutrophication of water bodies, nitrogen elements discharged into water bodies must be removed. In the past, ammonia nitrogen in wastewater was mainly controlled, and the methods for removing ammonia nitrogen in wastewater include: physical method, chemical method and biochemical method. Physical methods include reverse osmosis membrane method, ammonia nitrogen stripping method, and chemical methods include ion exchange method and chemical oxidation method. Due to the low cost, biological denitrification technology is the most widely used. Biological denitrification technology mainly includes: nitrification and denitrification process (A / O), simultaneous nitrification and denitrification...

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