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Method for efficiently removing organic pollutants in industrial wastewater

A technology for organic pollutants and industrial wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of many types of pollutants, difficult and difficult removal of organic pollutants, etc. problems, to achieve strong redox ability, increase mineralization rate, and save energy consumption

Active Publication Date: 2015-12-16
苏州清氧环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, industrial wastewater contains many types of pollutants with high content, which is difficult to be completely and thoroughly removed, and there are a large number of metal ions (such as iron ions) in industrial wastewater, which will form complexes with degradation intermediates (such as oxalic acid) substances, making it difficult for organic pollutants to be completely degraded into harmless CO 2

Method used

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  • Method for efficiently removing organic pollutants in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Proceed as follows:

[0031] Will O 2 into the ozone generator to prepare O 3 10% by volume O 2 and O 3 Mixed gas, the mixed gas is passed into the ozone contactor by adopting the microporous aeration method at the bottom; while the mixed gas is fed into the ozone contactor, the water body to be treated is injected into the ozone contactor, the hydraulic retention time is 15min, and the water body is output immediately, that is, Can;

[0032] The O 3 The ratio of the mass transfer mass to the volume of the water body to be treated is 75mg / L;

[0033] During the first 50% of the hydraulic retention time, a direct current is passed through the two ends of the cathode and anode electrodes located in the ozone contactor, and the current density at the cathode end is 35mA / cm 2 ; After ending the power-on, continue to irradiate the water body with a low-pressure mercury lamp of 10W in the remaining hydraulic retention time.

[0034] After testing, the degradation rate ...

Embodiment 2

[0036] Proceed as follows:

[0037] Will O 2 into the ozone generator to prepare O 3 10% by volume O 2 and O 3 Mixed gas, the mixed gas is passed into the ozone contactor by adopting the microporous aeration method at the bottom; while the mixed gas is fed into the ozone contactor, the water body to be treated is injected into the ozone contactor, the hydraulic retention time is 20min, and the water body is output immediately, that is, Can;

[0038] The O 3 The ratio of mass transfer to the volume of water to be treated is 50mg / L;

[0039] During the first 40% of the hydraulic retention time, a direct current is passed through the two ends of the cathode and anode electrodes located in the ozone contactor, and the current density at the cathode end is 38mA / cm 2 ; After ending the power-on, continue to irradiate the water body with a low-pressure mercury lamp of 10W in the remaining hydraulic retention time.

[0040] After testing, the degradation rate and mineralization...

Embodiment 3

[0042] Proceed as follows:

[0043] Will O 2 into the ozone generator to prepare O 3 10% by volume O 2 and O 3 Mixed gas, the mixed gas is passed into the ozone contactor by adopting the micropore aeration method at the bottom; while the mixed gas is fed into the ozone contactor, the water body to be treated is injected into the ozone contactor, the hydraulic retention time is 10min, and the water body is output immediately, that is, Can;

[0044] The O 3 The ratio of mass transfer to the volume of water to be treated is 100mg / L;

[0045] During the first 60% of the hydraulic retention time, a direct current is passed through the two ends of the cathode and anode electrodes located in the ozone contactor, and the current density at the cathode end is 32mA / cm 2 ; After ending the power-on, continue to irradiate the water body with a low-pressure mercury lamp of 10W in the remaining hydraulic retention time.

[0046] After testing, the degradation rate and mineralization ...

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Abstract

The invention relates to a method for efficiently removing organic pollutants in industrial wastewater. The method comprises the following operations: introducing a gas mixture of O2 and O3 into an ozone contactor by adopting a bottom microporous aeration manner; while the gas mixture is introduced, injecting a to-be-treated water body into the ozone contactor, wherein hydraulic retention time is 10 to 20min, and outputting the water body immediately; in the hydraulic retention time, firstly energizing two ends of a negative electrode and two ends of a positive electrode, located at the bottom part of the ozone contactor, by direct current, and after energizing, irradiating the water body by ultraviolet in the remaining hydraulic retention time. According to the method provided by the invention, ultraviolet irradiation, ozonation and an electrochemical method are combined, and reasonable limiting is performed through the time of the ultraviolet irradiation, the ozonation and the electrochemical method to participate in reaction and concrete parameters, therefore the synergistic effect of all factors is realized; while the degradation rate of the organic pollutants in the water body is increased, the mineralization rate of the water body is obviously increased; the oxidation-reduction ability is high; organic carbon sources are not needed, so that the energy consumption is low.

Description

technical field [0001] This patent relates to the field of wastewater treatment, in particular to a method for efficiently removing organic pollutants in industrial wastewater. Background technique [0002] The organic pollutants that exist in large quantities in water bodies pose a huge threat to the living environment of aquatic organisms. However, due to the characteristics of low concentration, high hazard and high stability, these organic substances cannot be effectively removed by traditional conventional processes. remove. Therefore, the research on the removal methods of organic pollutants will become one of the hot spots in the field of water pollution control. Under the ever-increasing threat, it is of extremely important strategic significance for the sustainable development of our country to study new technologies that can effectively remove refractory organic matter in water so as to effectively improve the quality of drinking water. [0003] The prior art di...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 王玉珏姚维坤非凡余刚
Owner 苏州清氧环境科技有限公司
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