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In-situ generated hydrogen peroxide and ferrate coupled water treatment advanced purification device and treatment method

A deep purification device, ferrate technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the limited effect of organic matter removal, high storage and transportation costs, pollution Incomplete removal of pollutants and other problems, to achieve excellent purification effect, efficient use of oxygen, and inhibition of side reactions

Active Publication Date: 2021-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The currently used ferrate will produce iron sludge and cause secondary pollution. The quality of commercially available ferrate products is uneven, the removal of pollutants is not complete, and the cost is high
However, hydrogen peroxide alone has limited effect on removing organic matter, and the storage and transportation costs are high.
At present, the existing Fenton system technology is mainly based on direct dosing of transition metal ions, which will also produce secondary pollution such as iron sludge

Method used

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  • In-situ generated hydrogen peroxide and ferrate coupled water treatment advanced purification device and treatment method
  • In-situ generated hydrogen peroxide and ferrate coupled water treatment advanced purification device and treatment method
  • In-situ generated hydrogen peroxide and ferrate coupled water treatment advanced purification device and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An in-situ generated hydrogen peroxide and ferrate coupled water treatment deep purification device, the device includes a solution external circulation unit, a deep purification unit, an air pump unit and an electronic control unit; the solution external circulation unit includes a circulation pump 20 and a temporary tank for organic waste water 21. The deep purification unit sequentially includes an anode area and a first cathode area and a second cathode area symmetrically arranged on the left and right sides of the anode area. The first cathode area and the anode area are separated by the first ion exchange membrane 12, and the anode area and the second The cathode area is separated by the second ion-exchange membrane 15, and the vertical horizontal plane of the first cathode area is provided with the first nano-aeration disc 10 and the first electrochemical cathode 11 arranged in parallel with it, and the anode area is provided with the electrochemical anode 14, and ...

Embodiment 2

[0074] Basically the same as Example 1, the difference is that the size is the same as the electrochemical anode 14, the thickness is 7.5mm, the volume ratio of the anode region to the first cathode region or the second cathode region is 1:6, and the monoatomic iron particle electrode 13 is uniformly dispersed in the anode area with a density of 30mg / L.

[0075] The preparation of the electrochemical anode (carbon iron electrode) is as follows:

[0076] 1) After mixing acetylene black, sodium bicarbonate and carbon iron substrate according to the optimal mass ratio of 10:5:100, place them in absolute ethanol and ultrasonically mix to obtain a mixed solution; acetylene black, sodium bicarbonate, 60wt The mass ratio of % polytetrafluoroethylene emulsion and carbon iron substrate is: 10: 5: 100: 100;

[0077] 2) Add 60wt% polytetrafluoroethylene emulsion to the mixed solution prepared in step 1) and stir it in a constant temperature water bath until it becomes a rubbery mixture;...

Embodiment 3

[0084] Basically the same as Example 1, the difference is that the size is the same as the electrochemical anode 14, the thickness is 10mm, the volume ratio of the anode region to the first cathode region or the second cathode region is 1:8, and the monoatomic iron particle electrode 13 Evenly dispersed in the anode area, its density is 50mg / L.

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Abstract

The invention discloses a deep purification device for in-situ hydrogen peroxide and ferrate coupled water treatment. The device includes a solution external circulation unit, a deep purification unit, an air pump unit and an electric control unit. The invention also discloses a sewage treatment method based on the device. The present invention introduces an electrochemical gas diffusion system, prepares an electrochemical cathode and an anode with the same preparation process, simplifies the process flow, the electrochemical cathode can efficiently utilize oxygen, and efficiently generate hydrogen peroxide in situ; at the same time, the electrochemical anode can provide a stable iron source for electrolysis Lye produces ferrate efficiently. The pH of the solution in the anode and cathode regions is effectively controlled through the ion exchange membrane, side reactions are suppressed, and energy consumption of the system is reduced. The introduction of a small amount of monoatomic iron can increase the formation rate and yield of ferrate, improve the coupling effect of the system, and help to accelerate the degradation of organic matter. Air is used as the oxygen source, and the cost is low; the electrode material is easy to obtain, and can be cleaned online, saving cost.

Description

technical field [0001] The invention belongs to the field of deep purification of sewage, and relates to a process for degrading and removing novel organic pollutants, in particular to a water treatment deep purification device and a treatment method coupled with hydrogen peroxide generated in situ and ferrate. Background technique [0002] At present, chemical, physical and biological methods are commonly used in sewage treatment plants to remove traditional pollutants, but the removal effect on new organic waste water is limited, especially the high-concentration medical waste water with drug resistance, and the incompletely removed waste water is discharged into the environment , a potential hazard. Ferrate has multiple functions such as oxidation, adsorption, flocculation, and sterilization. It is becoming a new type of high-efficiency multifunctional water treatment agent. It has a regular tetrahedral crystal structure and is stable in a dry environment. It decomposes w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/4672C02F2001/007C02F2101/30
Inventor 李海普姚晶晶潘思远高明栋王京杨兆光余博伦
Owner CENT SOUTH UNIV
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