Double turntable light-sensitive cell liquid membrane reactor photocatalysis organic wastewater processing method

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 achieve improved degradation efficiency, The effect of speeding up exchange updates and improving utilization

Active Publication Date: 2009-01-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new design for an apparatus called this device has two different types of structures: 1) a special type made up entirely from titania or other materials like ceramics used for making certain devices such as sensors, batteries, fuel cells, etc.; and 2) another way they can be connected together without losing their effectiveness due to being surrounded by water layers between them. These technical improvements improve the performance of these devices while reducing power usage compared to previous methods.

Problems solved by technology

This patents describes different ways to fix titanium dioxide onto surfaces such as glasses during production processes. However, these methods have limitations like requiring high temperatures and long exposures time, leading to decreased decomposition rates caused by hydrogen peroxides generated at lower pH levels than desired. Additionally, current methods involve injecting activators beforehand, increasing costs associated with materials handling.

Method used

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  • Double turntable light-sensitive cell liquid membrane reactor photocatalysis organic wastewater processing method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 Treatment of Dye Wastewater by Double Turntable Photocell 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 speed o

Embodiment 2

[0039] Example 2TiO 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 motor

Embodiment 3

[0049] Example 3TiO 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 the surface 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

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Claims

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Application Information

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Owner SHANGHAI JIAO TONG UNIV
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