Method for degrading organic wastewater by coupling light field, electric field and thermal field by utilizing solar energy

Abstract

The invention relates to a method for degrading organic wastewater by coupling light field, electric field and thermal field by utilizing solar energy. According to the method, electric energy is provided by adopting a solar battery; thermal energy is provided by adopting a solar thermal collecting device; carbon nano-tubes / secondary anodized TiO2 nano-tubes are taken as a working electrode; a platinum electrode is taken as a counter electrode; the counter electrode is electrically conducted with the positive electrode of the solar battery; the counter electrode is electrically conducted withthe negative electrode of the solar battery; before degradation, the working electrode and the counter electrode are placed into organic wastewater; the organic wastewater is heated by utilizing the solar thermal collecting device, and then, stands in a dark environment without electricity; in degradation, the organic wastewater is heated by utilizing the solar thermal collecting device, the wastewater is electrified by utilizing the solar battery, and the wastewater is subjected to electrolysis when the working electrode is irradiated by sunlight. According to the method, the light field, theelectric field and the thermal field are coupled by utilizing the solar energy; the degradation efficiency and the utilization rate of the solar energy are improved by the thermal field, the light field and the electric field.

Description

technical field [0001] The invention relates to the technical field of organic wastewater degradation, in particular to a method for degrading organic wastewater by utilizing solar energy through light-electricity-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, coagulation sedimentation, and advanced oxidation technology, as well as photocatalytic degradation, photo-assisted Fenton oxidation, and biodegradation. However, so far there is no satisfactory method that can be widely used in the efficient degradation of organic wastewater, and efficient wastewater treatment methods should fully consider economic rationality (eg: no or low consumption of chemicals) and environmental protection ("Green Repair Path"). Therefore, developing new technological, effici...

AI Technical Summary

Problems solved by technology

However, since both solar-thermal energy utilization and solar-electric energy utilization require the use of intermediate equipment for energy conversion and application, the conversion process is accompanied by a large energy loss.

Moreover, although the utilization of solar energy and light energy is a direct utilization, since the energy of the ultraviolet part only accounts for a small proportion of the energy of the solar spectrum, it cannot fundamentally improve the utilization rate of solar energy.

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