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Method for removing nitrate nitrogen in water, electrode biofilm culturing method, electrode and device

A technology of nitrate nitrogen and film hanging method, applied to electrodes and devices, in the field of removing nitrate nitrogen from water, can solve the problems of weak adsorption force between microorganisms and electrodes, not too high nitrate removal rate, slow film hanging speed, etc. , to achieve the effect of improving the film hanging efficiency, improving the nitrate removal efficiency, and enhancing the utilization rate of the current.

Inactive Publication Date: 2017-07-21
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual operation of the reactor, the speed of microorganisms forming a film on the surface of the electrode is very slow, and the amount of the film is small, and the adsorption force between the microorganism and the electrode is not strong.
The removal rate of nitrate is not too high

Method used

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  • Method for removing nitrate nitrogen in water, electrode biofilm culturing method, electrode and device
  • Method for removing nitrate nitrogen in water, electrode biofilm culturing method, electrode and device
  • Method for removing nitrate nitrogen in water, electrode biofilm culturing method, electrode and device

Examples

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Embodiment

[0052] The process of magnetization modification of foam nickel electrode comprises the following steps:

[0053] (1) Magnetic Nano Fe 3 o 4 Preparation of:

[0054] 4-6g of Fecl 3 .6H 2 O and 2.78 g of FeCl 2 .7H 2 Dissolve O in 100ml of pure water, then add 2g-3g of polyethylene glycol, stir magnetically, heat to 80-100°C, then add 15ml-20ml of NH 3 .H 2 O, in a nitrogen atmosphere at 60-80°C, react under magnetic stirring conditions for 30-40min, the product is separated by a magnet, washed with pure water, and then vacuum-dried for 6-8h to obtain PEG-Fe 3 o 4 NPS;

[0055] (2) placing the nickel foam after ultrasonic cleaning in a phosphate buffer solution with a concentration of 0.1M and a pH of 7.0 for cyclic voltammetry scanning, and the scanning potential is 0-2.5V;

[0056] (3) 3mg of PEG-Fe 3 o 4 Add NPS into water and ultrasonically disperse for 20-30min to obtain a super-dispersed solution, then apply it on the surface of the activated nickel foam elect...

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Abstract

The invention belongs to the technical field of water quality improvement and particularly provides a method for removing nitrate nitrogen in water, an electrode biofilm culturing method, an electrode and a device. The method for removing nitrate nitrogen in water comprises the following steps that 1, magnetic powder is added into sludge for domestication, so that microbes attach to the surface of the magnetic powder to form activated magnetic powder sludge; 2, the activated magnetic powder sludge is added into a magnetic electrode reactor provided with a magnetized cathode; 3, air is led to the activated magnetic powder sludge in the magnetic electrode reactor for reaction, and the cathode of the magnetic electrode reactor forms the electrode biofilm under the attraction of current impact and the magnetic electrode. By improving the adsorption capacity between the electrode and the microbes, the microbe biofilm culturing rate and biofilm culturing amount on the surface of the electrode are increased, and thus the nitrate removal rate can be improved.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of water quality purification, in particular to a method for removing nitrate nitrogen in water, a method for forming a film on an electrode, an electrode and a device. [0003] 【Background technique】 [0004] In recent years, due to the rapid development of urbanization, industrialization and agrochemical industry, the problem of nitrate nitrogen pollution in surface water, groundwater, domestic sewage and industrial wastewater has been caused. When humans drink water containing excessive nitrate, it will cause great harm to the human body. Studies have shown that nitrate itself is very weakly toxic to the human body, but it will be easily converted into nitrite after entering the human intestine. When the human body contains a small amount of nitrite, it will cause human organ lesions, while a large amount will cause the blood's oxygen-carrying capacity to decrease, resulting in hypoxia of human t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C01G49/08C02F101/16
CPCC01G49/08C02F3/005C02F3/2806C02F2101/163
Inventor 郭冀峰罗崇莉郭娉
Owner CHANGAN UNIV
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