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Method and device for multi-wavelength ultraviolet-electrochemical segmented treatment of wastewater

A technology for wastewater treatment and electrochemistry, applied in the field of water treatment, can solve problems such as the application and promotion of pollutant removal, HClO instability, application restrictions, etc., to avoid high-current operation mode, good selectivity, and anti-pollution ability strong effect

Active Publication Date: 2021-02-09
苏州清初环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although UV / Chlorine is considered as a new viable advanced oxidation technology, its application has some limitations
For example, in a distributed water treatment system, NaClO and HClO are corrosive and HClO is extremely unstable. The storage and transportation of chlorine limit the application and promotion of UV / chlorine for pollutant removal.

Method used

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  • Method and device for multi-wavelength ultraviolet-electrochemical segmented treatment of wastewater
  • Method and device for multi-wavelength ultraviolet-electrochemical segmented treatment of wastewater
  • Method and device for multi-wavelength ultraviolet-electrochemical segmented treatment of wastewater

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Effect test

Embodiment 1

[0046] The initial chloride ion concentration in the water sample to be treated was adjusted to 150mg / L. Add the water sample to be treated into the electrolytic cell of the present invention, connect the electrodes to the DC power supply correspondingly, turn on the LED ultraviolet lamp at the same time, turn on the ultrasonic generator 5 at the bottom of the electrolytic cell 1, and form a disturbance to the wastewater in the electrolytic cell 1 , and to prevent scaling on the surface of the bipolar electrode 3, the current density is 300mA / cm 2 ,

[0047] The treatment time is about 8 minutes, and the removal rate of refractory organic matter in water can reach more than 90%.

Embodiment 2

[0049] The initial chloride ion concentration in the water sample to be treated was adjusted to 120mg / L. Add the water sample to be treated into the electrolytic cell of the present invention, connect the electrodes to the DC power supply correspondingly, turn on the LED ultraviolet lamp at the same time, turn on the ultrasonic generator 5 at the bottom of the electrolytic cell 1, and form a disturbance to the wastewater in the electrolytic cell 1 , and prevent scaling on the surface of bipolar electrode 3, the current density is 320mA / cm 2 ,

[0050] The treatment time is about 10 minutes, and the removal rate of refractory organic matter in water can reach more than 90%.

Embodiment 3

[0052] The initial chloride ion concentration in the water sample to be treated was adjusted to 120mg / L. Add the water sample to be treated into the electrolytic cell of the present invention, connect the electrodes to the DC power supply correspondingly, turn on the LED ultraviolet lamp at the same time, turn on the ultrasonic generator 5 at the bottom of the electrolytic cell 1, and form a disturbance to the wastewater in the electrolytic cell 1 , and prevent scaling on the surface of the bipolar electrode 3, the current density is 330mA / cm 2 ,

[0053] The treatment time is about 15 minutes, and the removal rate of refractory organic matter in water can reach more than 90%.

[0054] The multi-wavelength ultraviolet-electrochemical stepwise wastewater treatment method described in the present invention can be used to treat various refractory industrial chemical wastewater, pesticide residues and medical wastewater.

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Abstract

The invention discloses a method and a device for multi-wavelength ultraviolet-electrochemical segmented treatment of wastewater. The device comprises an electrolytic cell, a cooling pipe, a bipolar electrode, an ultraviolet lamp and an ultrasonic generator, wherein the bipolar electrode is fixedly arranged at the middle portion of the electrolytic cell, the cooling pipe is arranged outside the bipolar electrode, the ultraviolet lamp is arranged in the cooling pipe, and the ultrasonic generator is arranged at the lower part of the bipolar electrode. The device enables chloride ions in the chlorine-containing wastewater to lose electrons on the surface of the anode electrode to generate free chlorine, and free chlorine is irradiated by UV light emitted by the LED ultraviolet lamp to furthergenerate a strong oxidizing substance containing hydroxyl radicals and active chlorine, so oxidative degradation of refractory organic pollutants in the wastewater is realized. The method for multi-wavelength ultraviolet electrochemical segmented treatment of wastewater can be used for treating various refractory industrial chemical wastewater, pesticide residues, pharmaceutical wastewater and the like; UV effect is optimized, a hydroxyl radical generation level is improved, and the UV / electrochemical energy efficiency is integrally improved.

Description

technical field [0001] The invention relates to a method and device for multi-wavelength ultraviolet-electrochemical segmental treatment of wastewater, belonging to the technical field of water treatment. Background technique [0002] Advanced Oxidation Processes (AOPs for short) is a toxic pollutant treatment technology formed in the 1980s. It is characterized by the generation of hydroxyl radicals (OH) through reactions, which have strong oxidizing properties. Free radical reaction can effectively decompose organic pollutants, and even completely transform them into harmless inorganic substances, such as carbon dioxide and water; compared with ordinary chemical oxidation methods, the reaction speed of advanced oxidation methods is very fast, and the general reaction rate constant is 108-1010mol-1Ls-1, can meet the treatment requirements in a very short time; UV / H2O2, UV / O3 and O3 / H2O2 processes are all advanced oxidation technologies that generate hydroxyl radicals. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/30
CPCC02F1/32C02F1/461C02F1/36C02F2303/22C02F2101/30Y02W10/37
Inventor 刘鼎杨宏伟张楠迟茜朱瑾
Owner 苏州清初环境科技有限公司
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