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

A technology for refractory organic matter and wastewater, applied in chemical instruments and methods, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as difficult to achieve removal effect and high COD concentration, and achieve effective cultivation and preservation, Maintain the effect of denitrification reaction and small footprint of the device

Active Publication Date: 2013-02-20
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

In industrial wastewater containing a large amount of refractory organic matter, the concentration of COD and total nitrogen is very high, and it is difficult to achieve a good removal effect by using the inventive method

Method used

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

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specific Embodiment 1

[0035] Wastewater raw water mainly contains ammonia nitrogen and refractory organic pollutants. After primary and secondary biochemical treatment, it mainly contains low concentrations of refractory pollutants and nitrate nitrogen, COD is 150~300mg / L, and nitrate nitrogen is less than 100mg / L. The waste water enters the storage tank 1, and enters the ozone catalytic oxidation tower 3 through the water inlet pump 2. The ozone catalytic oxidation tower 3 is filled with an ozone catalyst, and the lower part is fed with ozone. The ozone catalyst uses activated carbon to immobilize the iron-copper catalyst, and the whole is packaged in a porous regular stainless steel metal mesh Among them, the metal mesh shape cooperates with the ozone catalytic oxidation tower 3 to realize the overall filling. Under the action of ozone, macromolecular refractory organic pollutants (long chain or multi-benzene ring structure) are oxidized to small molecular organic compounds (chain breaking and r...

specific Embodiment 2

[0038] Wastewater raw water mainly contains ammonia nitrogen and refractory organic pollutants. After primary and secondary biochemical treatment, it mainly contains low concentrations of refractory pollutants and nitrate nitrogen, COD is 200~500mg / L, and nitrate nitrogen is less than 100mg / L. The waste water enters the storage tank 1, and enters the ozone catalytic oxidation tower 3 through the water inlet pump 2. The ozone catalytic oxidation tower 3 is filled with an ozone catalyst, and the lower part is fed with ozone. The ozone catalyst adopts a molecular sieve immobilized iron-copper catalyst, and is packaged in a porous regular stainless steel metal mesh as a whole. Among them, the metal mesh shape cooperates with the ozone catalytic oxidation tower 3 to realize the overall filling. Under the action of ozone, macromolecular refractory organic pollutants (long chain or multi-benzene ring structure) are selectively oxidized to small molecular organic compounds (chain bre...

specific Embodiment 3

[0041] Wastewater raw water mainly contains ammonia nitrogen and refractory organic pollutants. After primary and secondary biochemical treatment, it mainly contains low concentrations of refractory pollutants and nitrate nitrogen, COD is 200~500mg / L, and nitrate nitrogen is less than 100mg / L. The waste water enters the storage tank 1, and enters the ozone catalytic oxidation tower 3 through the water inlet pump 2. The ozone catalytic oxidation tower 3 is filled with an ozone catalyst, and the lower part is fed with ozone. The ozone catalyst is made of porous sintered ceramics to immobilize titanium dioxide, and the whole is packaged in a porous regular stainless steel metal mesh Among them, the metal mesh shape cooperates with the ozone catalytic oxidation tower 3 to realize the overall filling. Under the action of ozone, macromolecular refractory organic pollutants (long chain or multi-benzene ring structure) are selectively oxidized to small molecular organic compounds (ch...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/78C02F3/28
Inventor 李海波李玉平刘永胜贺荣华魏学勇
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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