Processing method for double turntable light-sensitive cell liquid membrane reactor photocatalysis organic wastewater

A technology of liquid membrane reactor and organic wastewater, applied in the direction of light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of increasing energy consumption, increasing energy consumption, reducing energy consumption, etc., to improve degradation efficiency, The effect of speeding up exchange updates and improving utilization

Active Publication Date: 2010-06-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are: first, the excitation light must pass through a thicker (often several centimeters) solution to irradiate the electrode, and the utilization rate of the excitation light is very low; second, the use of bias to transfer photogenerated electrons increases energy consumption; The third is to enhance the mass transfer by air blowing, and the effect is not good; the fourth is that the power of the excitation light source is relatively large, and the circulating cooling water device is added to evacuate heat, which not only increases the operating energy consumption, but also the reactor device is relatively complicated.
Therefore, its energy consumption is expected to be further reduced, and the processing efficiency needs to be further improved.

Method used

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  • Processing method for double turntable light-sensitive cell liquid membrane reactor photocatalysis organic wastewater
  • Processing method for double turntable light-sensitive cell liquid membrane reactor photocatalysis organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Treatment of Dye Wastewater by Double Turntable Photovoltaic Liquid Membrane Reactor with Different Cathode Materials

[0031] The treatment object is 20mg L -1 Rhodamine B (pH2.5, 1.0g / L Na 2 SO 4 ) to simulate dye wastewater. The waste water volume was 55ml.

[0032] 1) Using a titanium disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate as a photoanode, respectively fixed on the rotating shaft with the Cu, Zn, Fe or C disc cathode to form a double rotating disc, and the rotating shaft of the rotating disc is connected with the motor.

[0033] 2) Place the turntable in the semi-circular arc reaction tank, the rotating shaft of the turntable is at the water surface of the waste water, so that the lower half of the turntable is immersed in the waste water, and the photoanode and cathode turntables are connected by wires through the carbon brush connected to the rotating shaft.

[0034] 3) Start the motor, and control the rotation spe...

Embodiment 2

[0039] Example 2 TiO 2 Treatment of dye wastewater with different concentrations in a liquid membrane reactor with Ti and Cu double-rotating disk photocells

[0040] The treatment object is Rhodamine B of different concentrations (pH2.5, 1.0g / L Na 2 SO 4 ) to simulate dye wastewater. The waste water volume was 55ml.

[0041] 1) Using a titanium disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate as a photoanode, and is fixed on the rotating shaft together with the Cu disc cathode to form a double rotating disc, and the rotating shaft of the rotating disc is connected with the motor.

[0042] 2) Place the turntable in the semi-circular arc reaction tank, the rotating shaft of the turntable is at the water surface of the waste water, so that the lower half of the turntable is immersed in the waste water, and the photoanode and cathode turntables are connected by wires through the carbon brush connected to the rotating shaft.

[0043] 3) Start the mot...

Embodiment 3

[0049] Example 3 TiO 2 / Stainless steel and Cu double turntable photocell liquid membrane reactor to treat different concentrations of dye wastewater

[0050] The treatment object is Rhodamine B of different concentrations (pH2.5, 1.0g / L Na 2 SO 4 ) to simulate dye wastewater. The waste water volume was 55ml.

[0051] 1) Using a stainless steel disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate as a photoanode, and is fixed on the rotating shaft together with the Cu disc to form a double turntable, and the rotating shaft of the turntable is connected with the motor.

[0052] 2) Place the turntable in the semi-circular arc reaction tank, the rotating shaft of the turntable is at the water surface of the waste water, so that the lower half of the turntable is immersed in the waste water, and the photoanode and cathode turntables are connected by wires through the carbon brush connected to the rotating shaft.

[0053] 3) Start the motor, and control ...

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Abstract

The invention relates to a method for disposing organic wastewater by photocatalysis of double rotating table photocell liquid film reactor in the technical field of environmental catalysis. TiO2 photocatalyst is loaded on the base and is used as photo anode, which is fixed together with the cathode on the rotating shaft for forming a double rotating table, the lower half of the double rotating table is immerged in wastewater, and the double rotating table is connected with the carbon brush connecting with the rotating shaft by leads. The motor is started, and the rotate speed of the double rotating table is controlled, thus a layer of liquid film is formed on the surface of the double rotating table. An uviol lamp is taken as the excitation light source, the photoinduced electrons on thesurface of the photo anode of the TiO2 film rotating table is transferred to the surface of the cathode of the rotating table, the photoinduced electrons react with the saturated dissolved oxygen on the surface of the cathode rotating table so as to generate H2O2, and the indirect oxidation to organic matter and the direct oxidation to organic matter by photo cavity on the surface of TiO2 film photo anode rotating table improve the degradation efficiency; and the rotation of the rotating table speeds up exchange and update of electrode surface and bulk solution substance, mass transfer is strengthened, and higher effect thereof can be realized.

Description

technical field [0001] The invention relates to a method for treating organic wastewater in the technical field of chemical industry, in particular to a method for photocatalytically treating organic wastewater with a double-rotary photocell liquid membrane reactor. Background technique [0002] In recent years, TiO 2 It has been proven to be a highly efficient, stable, non-selective and readily available semiconductor photocatalyst. TiO 2 As an advanced oxidation technology, photocatalytic technology can almost completely mineralize air and water pollutants without secondary pollution, and the reaction conditions are mild. It has become an attractive method for organic pollution treatment. Since Fujishima discovered TiO in 1972 2 Since the photocatalytic splitting of water, TiO 2 Semiconductor photocatalysis technology has gradually been extensively studied in the treatment of organic matter. To solve TiO 2 Difficult to separate from wastewater, TiO 2 are immobilized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/72
Inventor 徐云兰贾金平王亚林陈思李侃
Owner SHANGHAI JIAO TONG UNIV
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