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A high-salt and high-cod wastewater electrolysis electrode and electrolytic oxidation treatment method

An electrolytic electrode and electrolytic oxidation technology, which is used in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve the problems of short electrode service life, low electrolytic oxidation efficiency, and electrode life reduction, and achieve stable electrolysis. , the effect of stable voltage and current, low power consumption

Active Publication Date: 2020-09-11
SHIJIAZHUANG YUANSHENGYUAN ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrodes based on titanium and covered with metal oxides of electrocatalysts and other components are commonly used electrodes at present, but the service life of such electrodes is still short, and there is still a lot of room for improvement. Moreover, At present, the electrolytic oxidation efficiency of sewage treatment by electrolysis is low, and the power consumption is large, especially for high-salt wastewater, not only the electrode life is greatly reduced, but also the power consumption is also high

Method used

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  • A high-salt and high-cod wastewater electrolysis electrode and electrolytic oxidation treatment method

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Effect test

Embodiment 6

[0044] This embodiment is an electrolysis experiment of a single strand of wastewater in a pharmaceutical factory workshop. The experimental power supply uses a DC pulse constant current source with a constant current of 9A and a voltage of 4.2V. The raw water samples and the indicators of electrolysis for 1 hour, 2 hours and 3 hours were tested respectively.

[0045] The results are as follows:

[0046] Inspection index Raw water sample 1h 2h 3h pH 6 5 5.5 6 Ammonia nitrogen (mg / L) 731 476 228 ----- COD (mg / L) 42640 29040 16650 2550 COD removal rate ------ 31.9％ 60.95％ 94.1％ CL - (mg / L)

[0047] As can be seen from the above table, the removal rate of ammonia nitrogen is 100%, and the removal rate of COD is 94.1%. It can be seen that the electrolytic electrode of the present invention has a stronger removal effect for ammonia nitrogen and COD in sewage.

Embodiment 7

[0049] This embodiment is an electrolysis experiment of high-concentration (high-salt and high-COD) wastewater from a pharmaceutical factory. The experimental power supply uses a DC pulse constant current source with a constant current of 9A and a voltage of 3.2V. The raw water samples and the indicators of electrolysis for 1 hour, 2 hours and 3 hours were tested respectively.

[0050] The results are as follows:

[0051] Detection Indicator Raw water sample 1h 2h 3h pH 6 5.8 5.8 5.9 Ammonia nitrogen (mg / L) 2017 1283 276 ----- COD (mg / L) 136010 93950 52190 17330 COD removal rate ----- 31.0％ 61.6％ 87.3％ CL - (mg / L)

[0052] As can be seen from the above table, the removal rate of ammonia nitrogen is 100%, and the removal rate of COD is 87.3%. It can be seen that the electrolytic electrode of the present invention has a stronger removal effect for ammonia nitrogen and COD in sewage.

Embodiment 8

[0054] This embodiment is an electrolysis experiment of comprehensive wastewater from a pharmaceutical factory. The experimental power supply uses a DC pulse constant current source with a constant current of 9A and a voltage of 4.8V. The raw water samples and the indicators of electrolysis for 1 hour, 2 hours and 3 hours were tested respectively.

[0055] The results are as follows:

[0056] Detection Indicator Raw water sample 1h 2h 3h pH 6 6 5.8 5.8 Ammonia nitrogen (mg / L) 675 437 203 ---- COD (mg / L) 43380 28305 14729 3826 COD removal rate ---- 34.8％ 66.1％ 91.2％ CL-(mg / L) 600 590 570 550 TDS content (mg / L) 1％ 1％ 0.9％ 0.8％

[0057] As can be seen from the above table, the removal rate of ammonia nitrogen is 100%, and the removal rate of COD is 91.2%. It can be seen that the electrolytic electrode of the present invention has a strong removal effect for ammonia nitrogen and COD in sewage.

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Abstract

The invention discloses a high-salt and high-COD wastewater electrolysis electrode and an electrolytic oxidation treatment method. The electrolysis electrode comprises a titanium plate matrix and a plating located on the surface of the titanium plate matrix; and the plating is an alloy of metal ruthenium, metal iridium and rare earth. Electrolysis electrodes are uniformly arranged at a certain interval in wastewater, one of two adjacent electrolysis electrodes serves as an anode, the other electrolysis electrode serves as a cathode, the anode is connected with the anode of an electrolysis power supply, and the cathode is connected with the cathode of the electrolysis power supply which is a direct-current pulse power supply. The electrolysis electrode disclosed by the invention is high inoxidation resistance, firm in combination of the plating and the titanium plate, incapable of generating spots or falling off within 5 years if being normally used, high in electrolysis oxidation efficiency 1.5 times as high as that of a common electrode during wastewater treatment, low in power consumption, stable in electrolysis as well as voltage and current in an electrolysis process due to the adoption of the constant direct-current pulse power supply, capable of effectively removing COD, ammonium, nitrogen and chloride ions in wastewater and particularly suitable for electrolysis oxidation treatment of high-salt and high-COD wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an electrolytic electrode and an electrolytic oxidation treatment method for high-salt and high-COD wastewater. Background technique [0002] The electrolytic water method is a new idea of ​​sewage treatment, and the mechanism of this method is an electrochemical catalytic oxidation process. The method does not need to add an oxidant, has no secondary pollution, has mild conditions, and has a wide range of applications. It has the functions of air flotation, flocculation and sterilization, and is considered to be one of the best methods suitable for reducing COD and improving B / C wastewater treatment, and is called "environmentally friendly" technology. [0003] The key to electrolytic water treatment of sewage is the oxidation electrode. The selection of electrode materials is very important. For the treatment of sewage, the electrode is required to have go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C25D3/56C22C5/04
CPCC02F1/46109C02F2001/46138C02F2001/46142C02F2209/08C22C5/04C25D3/567
Inventor 田云龙邓景山狄元丰
Owner SHIJIAZHUANG YUANSHENGYUAN ENVIRONMENTAL
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