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A method and device for removing nitrate nitrogen from water using a three-dimensional electrode

A three-dimensional electrode and water removal technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low efficiency of nitrate nitrogen and achieve the effect of easy automatic control

Inactive Publication Date: 2016-06-29
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above technical defects in the prior art, the present invention provides a method and device for removing nitrate nitrogen in water using a three-dimensional electrode. The method and device for removing nitrate nitrogen in water using a three-dimensional electrode need to be solved Solved the technical problem of low efficiency of reducing nitrate nitrogen in water by electrochemical electrolysis in the prior art

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  • A method and device for removing nitrate nitrogen from water using a three-dimensional electrode

Examples

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Embodiment 1

[0045] A method for removing nitrate nitrogen in water by using a three-dimensional electrode, the process flow chart of which is as follows figure 1 As shown, the waste water enters the electrolytic tank 2 from the bottom through the action of the peristaltic pump 3, and the electrolytic tank 2 is connected with the DC power supply 1, and the wastewater in the electrolytic tank 2 can be electrolyzed after the power is turned on. Before the experiment, the electrolytic cell 2 was filled with activated carbon 5 and foamed copper 6 as particle electrodes, so as to ensure the efficiency of electrolysis.

[0046] Repeat the above process, change the concentration of nitrate nitrogen and chloride ion respectively, and use the actual wastewater to investigate the removal effect of three-dimensional electrode on nitrate nitrogen. Using the same device without filling particle electrodes, the process flow chart is as follows figure 2 As shown, the removal effect of the two-dimension...

Embodiment 2

[0050] A method for electrolytically removing nitrate nitrogen using a two-dimensional electrode, specifically comprising the following steps:

[0051] (1) Prepare 4L of waste water with nitrate nitrogen and chloride ion concentrations of 28.0mgN / L and 300mg / L respectively and put it into the water storage glass tank 55, add 27.2g of KH 2 PO 4 Solid and 3.8g of NaOH solid to adjust the pH of the water sample to about 7, using NaOH 2 SO 4 Adjust conductivity;

[0052] (2), press figure 2 Connect the devices as shown in the flowchart, turn on the magnetic stirrer 66 and the peristaltic pump 33, and adjust the peristaltic pump 33 to a maximum flow rate of 100 rad / min, so that the waste water flows into the electrolytic cell 22 to react in time, and the treated water flows back from the electrolytic cell 22 to the glass in time. In the tank 55, and fully mix with the waste water in the tank;

[0053] (3) Turn on the DC power supply 11 and control its output current to 2.0A. ...

Embodiment 3

[0056] A method for removing nitrate nitrogen in water by using a three-dimensional electrode, specifically comprising the following steps:

[0057] (1) Prepare 4L of waste water with nitrate nitrogen and chloride ion concentrations of 28.0mgN / L and 300mg / L respectively and put it into the water storage glass tank 7, add 27.2g of KH 2 PO 4 Solid and 3.8g of NaOH solid to adjust the pH of the water sample to about 7, using NaOH 2 SO 4 Adjust conductivity;

[0058] (2), press figure 1 Connect the device as shown in the flowchart, turn on the magnetic stirrer 8 and the peristaltic pump 3, and adjust the peristaltic pump 3 to a maximum flow rate of 100 rad / min, so that the waste water flows into the electrolytic cell 2 to react in time, and the treated water flows back from the electrolytic cell 2 to the glass in time Tank 7, and fully mix with the wastewater in the tank;

[0059] (3) Turn on the DC power supply 1 and control its output current to 2.0A. Samples are taken fro...

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Abstract

The present invention uses a three-dimensional electrode to remove nitrate nitrogen in water. It includes a step of inputting wastewater from a wastewater distribution device into an electrolytic cell, and in the step of inputting wastewater from a wastewater distribution device into an electrolytic cell, said The electrolytic cell is provided with a cathode, an anode and a particle electrode, and the particle electrode is composed of activated carbon and metal copper foam, and the activated carbon and metal copper foam are filled in the electrode tank, and the electrode tank and a DC The power supply is connected, and after the power is turned on, the wastewater is electrolyzed in the electrode tank, and the electrolyzed wastewater is input into the wastewater distribution device for circulation, and the gas in the wastewater distribution device is discharged through the scrubber. The present invention also provides a device for realizing the above method. The present invention utilizes activated carbon and foamed copper double fillers to enhance the mass transfer process, and on this basis uses electrochemical redox to remove nitrate nitrogen in the water body, reducing the impact of nitrate nitrogen on the human body. harm.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a water treatment method and a device thereof, in particular to a method and a device for removing nitrate nitrogen in water by using a three-dimensional electrode. Background technique [0002] With the increasing frequency of human activities, drinking water sources around the world, such as groundwater, river water, lake water and other surface water, have been seriously polluted by nitrate nitrogen, especially groundwater. Long-term drinking of drinking water with excessive nitrate content will have adverse effects on human health. After nitrate is ingested into the human body, it is reduced to nitrite in the stomach. Nitrite can directly oxidize ferrous ions rich in hemoglobin in the blood into ferric ions, reducing the oxygen carrying capacity of the blood, thus It can cause various diseases, such as methemoglobinemia, liver damage and cancer, etc. Babies whose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467C02F1/58
Inventor 李亮黄远星周悦梅张月陟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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