Green energy-saving photoelectrocatalysis water treatment system and water treatment method thereof
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A water treatment system, photoelectric catalysis technology, applied in the field of water treatment
Active Publication Date: 2020-09-11
NANJING DAIMONTE TECH CO LTD
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However, ultraviolet radiation in sunlight usually only accounts for about 5% of the total emitted energy, and it is impossible to directly use sunlight for photocatalytic degradation of organic wastewater.
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Embodiment 1
[0077] In this embodiment 1, the anode adopts a boron-doped diamond electrode (BDD electrode), and the cathode selects a graphite electrode, and the preparation method of the boron-doped diamond electrode is as follows:
[0078] 1.1 Substrate material pretreatment
[0079] First, the cylindrical foam Ti is used as the substrate, and it is polished with 600#, 800#, and 1000# metallographic sandpaper; then the polished foam Ti substrate is immersed in acetone (CH 3 COCH 3 ), absolute ethanol (C 2 h 5 OH) for 10 minutes of ultrasonic oscillation; then the Ti substrate was placed in the nano-diamond suspension and the seed crystal was ultrasonically planted for 30 minutes to enhance the nucleation. Finally, rinse with deionized ultrapure water and dry for use.
[0080] 1.2BDD film deposition
[0081] (1) The hot wire used in this paper is The straight tungsten wire is used to completely cover the straight wire directly above the substrate, and then the pretreated substrate ...
Embodiment 2
[0086] Other conditions are the same as in Example 1, except that the photocatalyst is replaced by Au-doped TiO 2, after 48 hours of treatment at a stirring speed of 500r / min, the water TOC in the degradation tank detected by the water quality online module dropped from 3582mg / L to 1269mg / L, the COD value dropped from 20071mg / L to 1138mg / L, and the water color changed from dark to dark Brown to clear.
Embodiment 3
[0092] The above system is used to treat an actual chemical and pharmaceutical wastewater. The composition of the water is complex, including antibiotic residues, antibiotic intermediates, unreacted raw materials, organic solvents, etc. Treat 1L of water sample. When entering the water sample, it first enters the liquid storage tank, and then enters the degradation tank after being filtered by the particle filter plate in the liquid storage tank. The particle filter plate is selected from the PP cotton filter plate, and the wall of the degradation tank contains medium Paraffin (phase change material), the temperature of water in the degradation tank is 45°C, and 3 sets of counter electrodes are set in the degradation tank, wherein the anode 5 adopts a boron-doped diamond electrode (BDD electrode), and the cathode 6 selects a graphite electrode; between each set of electrodes The spacing is 10mm, the current density is 50mAcm -2 , the UV light intensity is 50MJ m -2 ; with TiO...
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Abstract
The invention discloses a green energy-saving photoelectrocatalysis water treatment system and a water treatment method thereof. The green energy-saving photoelectrocatalysis water treatment system comprises a liquid storage tank, a particle filter plate, a degradation tank and a microbiological treatment module, an intelligent temperature control module and a solar light-electricity-heat intelligent conversion module; the degradation tank is composed of a plurality of treatment units, and any treatment unit comprises an anode, a cathode and a stirring device; wherein the anode is a boron-doped diamond electrode loaded with a photocatalyst, the anode and the cathode are connected to a power supply through wires, and the power supply is connected to a solar power generation unit; the degradation tank further comprises a plurality of ultraviolet lamps, and the ultraviolet lamps directly irradiate the anode; through organic combination of photocatalytic oxidation and electrochemical oxidation, the removal rate of organic pollutants is remarkably increased, electrolysis energy consumption is reduced, reaction conditions are mild, environment friendliness is achieved, and operation is easy, therefore the system is suitable for water treatment under various water quality conditions.
Description
technical field [0001] The invention relates to a green energy-saving photocatalytic water treatment system and a water treatment method thereof, belonging to the technical field of water treatment. Background technique [0002] Science and technology is a double-edged sword. On the one hand, the development of science and technology has enriched our life and improved work efficiency; on the other hand, the development of science and technology has also brought a series of safety problems, such as environmental damage and so on. According to the survey of the world authoritative organization, with the rapid development of modern social economy and the overall progress of science and technology, tens of thousands of tons of complex man-made organic chemicals are consumed and discharged into the water environment every year around the world to become environmental organic pollutants. . The printing and dyeing industry consumes a lot of water, usually 100-200t of water is con...
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