A method for degrading organic wastewater by using solar energy through photo-electric-thermal three-field coupling

An organic wastewater and solar cell technology, applied in general water supply conservation, chemical instruments and methods, special compound water treatment, etc., can solve problems such as energy loss, inability to fundamentally improve solar energy utilization, etc. Conducive to the effect of reaction kinetics and reduction of redox potential

CN108275811BActive Publication Date: 2021-02-09NORTHEAST GASOLINEEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-02-09

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Abstract

The invention relates to a method for utilizing solar energy to degrade organic waste water through photo-electric-thermal three-field coupling. The method uses solar cells to provide electric energy, adopts solar thermal collectors to provide heat energy, and uses carbon nanotubes / secondary anodes to oxidize TiO 2 The nanotube is used as the working electrode, and the platinum electrode is used as the counter electrode, the working electrode is electrically connected to the positive electrode of the solar cell, and the counter electrode is electrically connected to the negative electrode of the solar cell; before degradation, the working electrode and the counter electrode are placed in an organic In the waste water, use the solar heat collecting device to heat the organic waste water, and then let it stand in a dark environment without electricity; when degrading, use the solar heat collecting device to heat the organic waste water, use the solar cell to energize the waste water, Electrolysis was carried out under the condition of sunlight irradiating the working electrode. In the method, the invention couples the energy of three fields of solar energy: heat field, light field and electric field energy, so as to improve the degradation efficiency and the utilization rate of solar energy.
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Description

technical field

[0001] The invention relates to the technical field of organic wastewater degradation, in particular to a method for utilizing solar energy to degrade organic wastewater through photoelectric-thermal three-field coupling. Background technique

[0002] Traditional organic wastewater treatment methods include physical methods such as foam separation technology, adsorption and membrane separation technology, chemical methods such as flocculation sedimentation method, coagulation sedimentation method, advanced oxidation technology, photocatalytic degradation, photo-assisted Fenton oxidation and biological degradation, etc. However, so far there is no satisfactory method that can be widely used in the efficient degradation of organic wastewater. Efficient wastewater treatment methods should fully consider economic rationality (such as: no or low consumption of chemicals) and environmental protection. ("green repair path"). Therefore, developing new technological,...

Examples

Embodiment 1

[0042] The method provided by the invention is used to degrade the wastewater containing nitrobenzene.

[0043] Preparation of photocatalyst material: The titanium sheet was ultrasonically cleaned in acetone, absolute ethanol and distilled water for 15 min in sequence, and dried in nitrogen. Two-electrode system is adopted: the power supply adopts a DC stabilized power supply, and the titanium sheet is used as the anode to connect to the positive electrode of the DC power supply, and the platinum sheet (2cm×2cm) is connected to the negative electrode of the power supply as the counter electrode. 4 F+(CH 2 Oh) 2 +2vol%H 2 In the electrolyte solution composed of a mixed solution of O, the electrolysis was carried out at a constant voltage of 50V at room temperature, and the electrolysis time was 30min. After the reaction, the titanium sheet was rinsed with distilled water, placed in a muffle furnace in an air atmosphere, and the temperature was raised from room temperature to...