Organic wastewater treatment film reactor utilizing sunlight-assisted electro-catalysis

A technology for organic wastewater treatment and photoelectric catalysis, which is applied in the fields of energy wastewater treatment, light water/sewage treatment, water/sewage treatment, etc. Changes over time, restricting the development of membrane separation technology, etc., achieve the effect of avoiding easy passivation and deactivation, dense surface, and strong interface bonding.

Inactive Publication Date: 2012-07-25
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Refractory wastewater has become a difficulty in wastewater treatment and the focus of research at home and abroad. The early commonly used organic wastewater treatment technologies at home and abroad are generally non-destructive treatment technologies, such as chemical coagulation, air flotation, physical adsorption, membrane Filtration, etc., just transfer the organic matter from the liquid phase to the solid phase, and the problems of secondary pollution and regeneration of adsorbents and coagulants have not been reasonably solved.
However, membrane fouling is the biggest defect of membrane separation technology. Membrane fouling causes significant changes in membrane water treatment effect and energy consumption over time, which restricts the further development of membrane separation technology.

Method used

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  • Organic wastewater treatment film reactor utilizing sunlight-assisted electro-catalysis
  • Organic wastewater treatment film reactor utilizing sunlight-assisted electro-catalysis
  • Organic wastewater treatment film reactor utilizing sunlight-assisted electro-catalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The photoanode of this embodiment uses cylindrical porous titanium as the substrate, and uses electrochemical anisotropic etching to etch TiO on the surface of the porous titanium. 2 Nanotubes are impregnated with active tin antimony cerium oxide components, and then modified by nitrogen doping to prepare electrodes with photocatalytic activity. The power supply of the device of the present invention is a commercialized polycrystalline silicon solar cell assembly (6W), and the photocatalytic light source is a xenon lamp (or ultraviolet lamp). The organic wastewater treatment device mentioned above was used to carry out the methyl orange simulated wastewater experiment under indoor weak light conditions. In this experiment, no voltage and current were applied between the cathode and anode electrodes, and no irradiation light source required for photocatalysis was provided.

[0031] The initial concentration of methyl orange simulated wastewater is 2.0*10 -5 mol / L, 0.01m...

Embodiment 2

[0033] Using the solar light-assisted electrocatalytic organic wastewater treatment membrane reaction device described in Example 1 to carry out the methyl orange simulated wastewater experiment under indoor weak light conditions, this experiment applies voltage and current between the cathode and anode electrodes, and does not provide the required photocatalysis. of light source. Commercialized polysilicon solar cell modules (6W) are selected as the power supply, the control voltage is 6V, and the current density is 20-40mA / cm 2 . The initial concentration of methyl orange simulated wastewater is 2.0*10 -5 mol / L, add 0.01mol / L sodium sulfate (Na 2 SO 4 ) as a conductive salt. In the experiment, the porous active electrode in Example 1 was used as the photoanode, the nickel sheet was used as the cathode, the distance between the cathode and the anode was 2mm, and the flow rate of the waste water to be treated was controlled to be 0.5ml / s. Using the circulation method, aft...

Embodiment 3

[0035] Using the solar light-assisted electrocatalytic organic wastewater treatment membrane reaction device described in Example 1 to carry out the methyl orange simulated wastewater experiment under the illumination conditions of the solar simulator indoors, this experiment does not apply voltage and current between the cathode and anode electrodes, only Provide the irradiation light source required for photocatalysis. The initial concentration of methyl orange simulated wastewater is 2.0*10 -5 mol / L, add 0.01mol / L sodium sulfate (Na 2 SO 4 ) as a conductive salt. The xenon lamp is used as the radiation source for the photocatalytic reaction, and the light intensity is controlled at 100mW / cm 2 . In the experiment, the porous active electrode in Example 1 was used as the photoanode, the nickel sheet was used as the cathode, the distance between the cathode and the anode was 2mm, and the flow rate of the waste water to be treated was controlled to be 0.5ml / s. Using the ci...

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Abstract

The invention relates to an organic wastewater treatment film reactor utilizing solar energy photo-assisted electro-catalysis, which comprises a storage tank of water to be processed, a flow controllable constant flow pump, a photoelectric chemical reactor, a clear water storage tank and a solar battery component, wherein a photo anode and a cathode are correspondingly arranged in the reactor; the photo anode takes a porous metal membrane as a base body, and a TiO2 nano tube or a TiO2 mesoporous membrane is formed on the surface of a porous titanium membrane (net) by an electrochemical anisotropic etching technology; a porous channel film is used as the base body; a metal oxide coating electrode with high electrochemical catalytic activity and high electrical conductivity is prepared by a dipping film-forming method, simultaneously, by doping and modifying operations, the electrode material has photo catalytic activity and the reaction efficiency is improved. The reactor integrates electrochemistry, photocatalysis and film separation technologies; the three technologies are coupled to enhance a synergistic effect; the wastewater treatment efficiency can be improved; a solar component is adopted as a power supply; the clean solar energy is utilized to the maximal degree, and the organic wastewater treatment film reactor has social benefits of reducing environment load and economic benefits of reducing cost.

Description

technical field [0001] The invention relates to a device for organic wastewater treatment by fully utilizing solar energy and integrating photocatalysis and electrochemical technology, which is characterized in that the device is designed according to the characteristics of a membrane reactor, and the photoanode simultaneously has electrocatalysis, photocatalysis or / and membrane separation The characteristics of the three water treatment technologies can be extended and applied to the field of toxic, harmful, high-concentration and refractory organic wastewater treatment. Background technique [0002] After entering the 21st century, environmental and energy issues are major issues facing and urgently to be resolved by human society. Refractory wastewater has become a difficulty in wastewater treatment and the focus of research at home and abroad. The early commonly used organic wastewater treatment technologies at home and abroad are generally non-destructive treatment tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/30
CPCY02W10/37
Inventor 周幸福柴青立邵长林
Owner NANJING UNIV OF TECH
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