Method for photoelectrocatalysis oxidization of organic waste water with ozone

A technology of ozone catalytic oxidation and photoelectric catalysis, applied in chemical instruments and methods, oxidized water/sewage treatment, electrochemical water/sewage treatment, etc., can solve the problems of low efficiency and high cost, achieve economical value and reduce treatment costs , the effect of shortening the processing time

Inactive Publication Date: 2009-07-29
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low efficiency and high cost of photocatalytic removal of organic pollutants in the prior art

Method used

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  • Method for photoelectrocatalysis oxidization of organic waste water with ozone

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] like figure 1 As indicated, add 500 mL of 10 mg / L neutral red solution into the reactor. A UV lamp with a power of 4W was placed on top of the reactor. 25g of activated carbon-supported titanium dioxide catalyst is placed at the bottom of the reactor as the anode, and the carbon rod is used as the cathode, and the applied cell pressure is 2V. Ozone enters the reactor through the bottom aeration device, the dosage is 15mg / min, the reaction time is 60min, and the ozone tail gas is absorbed through the KI absorption bottle.

[0021] The neutral red solution treated by single ozone catalytic oxidation and photoelectric catalytic oxidation has a removal rate of 43% and 66% respectively, and the neutral red solution treated under the above conditions has a removal rate of 85% after measurement, which has Better degradation effect.

Embodiment 2

[0023] like figure 1 As indicated, add 500 mL of 10 mg / L neutral red solution into the reactor. A UV lamp with a power of 9W was placed on top of the reactor. 25g of activated carbon-supported titanium dioxide catalyst is placed at the bottom of the reactor as the anode, and the carbon rod is used as the cathode, and the applied cell pressure is 2V. Ozone enters the reactor through the bottom aeration device, the dosage is 15mg / min, the reaction time is 60min, and the ozone tail gas is absorbed through the KI absorption bottle.

[0024] The neutral red solution treated by single ozone catalytic oxidation and photoelectric catalytic oxidation has a removal rate of 43% and 76% respectively, and the neutral red solution treated under the above conditions has a removal rate of 95% after measurement, which has Better degradation effect.

Embodiment 3

[0026] like figure 1 As shown, 500 mL of printing and dyeing wastewater with an initial COD of about 700 mg / L was added to the reactor. A UV lamp with a power of 9W was placed on top of the reactor. 25g of activated carbon-supported titanium dioxide catalyst is placed at the bottom of the reactor as the anode, and the carbon rod is used as the cathode, and the applied cell pressure is 2V. Ozone enters the reactor through the bottom aeration device, the dosage is 50mg / min, and the reaction time is 60min. The ozone tail gas is absorbed through the KI absorption bottle.

[0027] Single ozone catalytic oxidation and photoelectric catalytic oxidation treatment of printing and dyeing wastewater, the measured COD removal rate is 75% and 33%, respectively, and the printing and dyeing wastewater solution treated under the above conditions, the measured COD removal rate is 92%, has a relatively high Good degradation effect.

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Abstract

The invention discloses a method for oxidizing organic wastewater by ozone, light, electricity and a catalyst. During reaction, ozone is introduced from an aerator arranged at the bottom of the reaction, active carbon-carried nano titanium dioxide is used as an anode, a carbon used as a cathode, and an ultraviolet lamp is arranged on the top or inside of the reactor; the cell voltage is 1 to 20 volts, the time for the action of an active carbon-carried catalyst and a water solution containing arsenic, the air and the ultraviolet lamp is 10 to 120 minutes, and the mass ratio of an added catalyst to waste water participating in reaction is between 1:200 and 1:20; a method for the ozone photoelectrocatalytic deep treatment of organic wastewater uses the active carbon-carried nano titanium dioxide as an anode to promote the photoelectrocatalysis and to catalyze the ozone to generate high- oxidizability free radicals; and organic substances difficult to treat can be fully degraded under the concerted action of light, electricity and the ozone, and the method has more utilization value than single ozone catalytic oxidation and single photoelectrocatalysis.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a method for treating organic wastewater by using activated carbon-loaded titanium dioxide as a catalyst for photoelectric reaction and ozone oxidation reaction. Background technique [0002] As a strong oxidizing agent, ozone is gradually being paid attention to by people because of its unique advantages. It is widely used in the fields of water disinfection, air disinfection, object surface disinfection, and environmental deodorization and deodorization. [0003] Since the first water plant using ozone oxidation as a drinking water treatment process was invested and operated in Nice, France in 1906, the application of ozone oxidation technology to water treatment has a history of more than 100 years. Although it has always been known for its high efficiency and no pollution, it also has obvious shortcomings. The main performance is that although ozone has extremely high o...

Claims

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Application Information

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IPC IPC(8): C02F1/78C02F1/32C02F1/46C02F1/28B01J21/06
Inventor 潘湛昌许磊肖楚民黄雪萍魏志钢邓宇文洪浩峰陈世荣胡光辉
Owner GUANGDONG UNIV OF TECH
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