Three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and wastewater treatment method

A treatment device, electrochemical technology, applied in water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of low space-time efficiency in wastewater treatment, and achieve the purpose of inhibiting the formation of carcinogenic bromate, The effect of improving the utilization rate and increasing the contact area

Pending Publication Date: 2021-07-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the technical problem of low time-space efficiency of the existing electrochemical method for treating wastewater, the present invention provides a three-dimensional electrochemical-perozone coupling treatment device and a wastewater treatment method for refractory wastewater. The cathode of the three-dimensional electrochemical-perozone coupling treatment device of the present invention Particle electrodes are filled between the anode and the anode. When the electricity is applied, the particle electrodes will be polarized to form countless microelectrodes. The distance between the electrodes will be significantly reduced, the contact area between the electrodes and the ozone will increase, the mass transfer effect will be greatly improved, and a three-dimensional microelectrode will be formed. The coupling of electrochemistry and electro-ozone, using cathodic electrolysis reaction (O 2 +2H + +2e→H 2 o 2 ) produced H 2 o 2 And the alkaline environment around the cathode surface is just conducive to the ozone reaction (2H 2 o 2 +2O 3 →·OH+H 2 O+3O 2 +HO 2 ·) Generate non-selective strong oxidizing hydroxyl radicals (·OH)

Method used

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  • Three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and wastewater treatment method
  • Three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and wastewater treatment method
  • Three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, a three-dimensional electrochemical-perozone coupled treatment device for refractory wastewater includes a three-dimensional electrochemical-perozone coupled reactor 3, and the three-dimensional electrochemical-perozone coupled reactor 3 includes a reactor tank 8, a reactor tank The body 8 is provided with a cathode 10 and an anode 11 connected to each other through a DC power supply 9. The reactor tank 8 is also filled with a particle electrode 12. The particle electrode 12 is located between the cathode 10 and the anode 11. The bottom of the reactor tank 8 is provided with Microbubble ozone distributor 13 is arranged, and microbubble ozone distributor 13 is connected to ozone generator 14;

[0041] Wherein, the cathode 10 is at least one of stainless steel, activated carbon felt, activated carbon fiber, carbon black-PTFE or foamed nickel;

[0042] The anode 11 is a titanium plate or a titanium mesh coated with a metal oxide coating on the s...

Embodiment 2

[0045] Such as figure 2 As shown, a three-dimensional electrochemical-perozone coupled treatment device for difficult-to-treat wastewater includes an electroflocculator 1, a first filter 2, a three-dimensional electrochemical-perozone coupled reactor 3, and a second filter connected sequentially through pipelines 4. Reverse osmosis device 5. CO 2 Hardening reactor 6 and MVR evaporator 7;

[0046] Wherein the anode of the electrocoagulator 1 is a soluble aluminum electrode;

[0047] The first filter 2 is a filter combination of a quartz sand filter and a polyethylene sintered filter core (the aperture is 2 μm);

[0048] The three-dimensional electrochemical-overozone coupled reactor 3 includes a reactor tank 8, the reactor tank 8 is provided with a water inlet and a water outlet, and the reactor tank 8 is provided with a cathode 10 and an anode connected to each other by a DC power supply 9 11. The cathode 10 is made of stainless steel, the anode 11 is a titanium plate coat...

Embodiment 3

[0051] Adopt embodiment 2 device to treat waste water, the COD of waste water is 83mg / L, TN is 66mg / L, and salt is 2594mg / L, and concrete processing method comprises the following steps:

[0052] (1) Refractory wastewater is electrocoagulated by an electroflocculator, and is pre-filtered through a quartz sand filter and a polyethylene sintered filter element, and then enters a three-dimensional electrochemical-ozone coupling reactor, and the ozone generator is turned on, and the ozone is 80mg / L The concentration is added to the three-dimensional electrochemical-perozone coupling reactor to form microbubbles 17, and the DC power is turned on to make the current density reach 10mA / cm 2 , the treatment time is 45 minutes, and the wastewater indicators after treatment are reduced to COD≤30mg / L, TN≤10mg / L;

[0053] (2) Use the ultrafiltration membrane to filter the wastewater after the three-dimensional electrochemical-ozone coupling treatment for the second time, and intercept mac...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and a wastewater treatment method. The device comprises a three-dimensional electrochemical-ozonation coupling reactor, and the three-dimensional electrochemical-ozonation coupling reactor comprises a reactor tank body; and a cathode and an anode which are connected with each other through a direct-current power supply are arranged in the reactor tank body, a particle electrode is also filled in the reactor tank body, the particle electrode is positioned between the cathode and the anode, a microbubble ozone distributor is arranged at the bottom of the reactor tank body, and the microbubble ozone distributor is connected with an ozone generator. The method comprises the following steps: after being subjected to electric flocculation and primary filtration, wastewater difficult to treat enters the three-dimensional electrochemical-ozone coupling reactor and is treated. The particle electrode is filled between the cathode and the anode, so that the mass transfer effect under the electrifying condition is improved, and the current efficiency, the electrochemical reaction rate and the treatment effect of the wastewater treatment method adopting the device are greatly improved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a three-dimensional electrochemical-perozone coupling treatment device and a wastewater treatment method for refractory wastewater. Background technique [0002] A large number of research and production practices have shown that the tail water after biochemical treatment still cannot meet the discharge standards in chemical companies such as oil and gas production, petrochemical, pharmaceutical, printing and dyeing, and the main organic pollutants contained in the tail water are soluble refractory organic compounds. , such as organic compounds containing aromatic rings. Removing organic pollutants in tail water, reducing tail water chemical oxygen demand (COD) and total nitrogen (TN) is an important content of wastewater treatment. [0003] Fenton method, catalytic ozone oxidation method, perozonation oxidation method, and photocatalytic oxidation are commonly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/463C02F1/467C02F1/78C02F9/06C02F101/30
CPCC02F1/46104C02F1/461C02F1/46114C02F1/463C02F1/4672C02F1/78C02F9/00C02F1/001C02F1/444C02F1/441C02F1/041C02F5/02C02F2101/30
Inventor 赵瑞玉朱成君李宁峰罗贵林朱晓菲
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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