Method and device for removing nitrate nitrogen in water by using three-dimensional electrodes

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 problems of low efficiency of nitrate nitrogen, achieve high treatment efficiency, simple equipment, harm reduction effect

Inactive Publication Date: 2014-11-26
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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  • Claims
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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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  • Method and device for removing nitrate nitrogen in water by using three-dimensional electrodes
  • Method and device for removing nitrate nitrogen in water by using three-dimensional electrodes

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 4 L of waste water with nitrate nitrogen and chloride ion concentrations of 28.0 mg N / L and 300 mg / L, respectively, and put it into the water storage glass tank 55, and add 27.2 g of KH 2 PO 4 solid and 3.8 g 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, 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 In the glass 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 2.0 A. ...

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 4 L of waste water with nitrate nitrogen and chloride ion concentrations of 28.0 mg N / L and 300 mg / L, respectively, and put it into the water storage glass tank 7, and add 27.2 g of KH 2 PO 4 solid and 3.8 g 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 In the glass tank 7, and fully mix with the waste water in the tank;

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

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Abstract

The invention provides a method for removing nitrate nitrogen in water by using three-dimensional electrodes, which comprises the following steps: wastewater is input from a wastewater distribution device into a electrolysis bath, wherein a cathode, an anode and a particle electrode are arranged in the electrolysis bath, the particle electrode is composed of activated carbon and foamed metal copper, the activated carbon and foamed metal copper are filled in an electrode tank, and the electrode tank is connected with a direct current power supply; and after the power is on, the wastewater in the electrode tank is electrolyzed and input into the wastewater distribution device to be circulated, and the gas in the wastewater distribution device is discharged through a gas washer. The invention also provides a device for implementing the method. The double fillers activated carbon and foamed copper are utilized to enhance the mass transport process; and on such basis, the electrochemical redox is utilized to remove the nitrate nitrogen in the water body, thereby reducing the hazard of the nitrate nitrogen to the human body.

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 Applications(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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