Method for removing ammonia nitrogen by three-dimensional electrode

A three-dimensional electrode, ammonia nitrogen technology, used in sterilization/microdynamic water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of limited ammonia nitrogen exchange capacity and cumbersome operation process, so as to improve the ammonia nitrogen removal capacity and current. Efficiency and high degree of automation

Inactive Publication Date: 2013-12-04
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the exchange capacity of zeolite to ammonia nitrogen is limited. When the concentration of ammonia nitrogen in the effluent exceeds the limit value, it is necessary to replace the zeolite, which makes the actual operation process cumbersome.

Method used

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  • Method for removing ammonia nitrogen by three-dimensional electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 It is a schematic diagram of the device structure of the three-dimensional electrode ammonia nitrogen removal method of this embodiment.

[0027] The device for removing ammonia nitrogen by the three-dimensional electrode in the present embodiment, such as figure 1 As shown, it includes: an electrolytic cell 2 for treating wastewater; a peristaltic pump 3 for delivering wastewater to the electrolytic cell; a water collection tank 5 for collecting treated wastewater; a DC power supply 1 for supplying power to the electrolytic cell 2; And waste water tank 4, used for storing waste water containing ammonia nitrogen. Wherein, the cathode of the three-dimensional electrode in the electrolytic cell 2 and the top of the anode are connected to a DC power supply, and the anode is Ti / RuO 2 , the cathode is a stainless steel plate, the particle electrode of the three-dimensional electrode is natural clinoptilolite 6, and the particle diameter of natural clinoptilolite 6...

Embodiment 2

[0043] Preparation of a certain amount of ammonia nitrogen and chloride ion concentration is respectively 24.0mg N / L, 300mg / L waste water is packed in waste water tank 4, utilizes the NaOH solution of 1mol / L and the H of 0.5mol / L 2 SO 4 The solution adjusts the pH of the water sample to 7, using Na 2 SO 4 Adjust conductivity to 1500 μS / cm.

[0044] A method for removing ammonia nitrogen from water using a three-dimensional electrode, comprising the following steps:

[0045] Such as figure 1 As shown, connect the device;

[0046] Open the peristaltic pump, waste water is sent into described electrolytic cell, control peristaltic pump rotating speed is 5rpm, and the hydraulic retention time of waste water in electrolytic cell is 31min this moment;

[0047] Before powering on, feed enough waste water containing ammonia nitrogen into the electrolytic cell until the concentration of ammonia nitrogen in the effluent is consistent with that of the influent water, so that the zeo...

Embodiment 3

[0054] Preparation of a certain amount of ammonia nitrogen and chlorine ion concentration is respectively 25.0mg N / L, 300mg / L waste water is packed in waste water tank 4, utilizes the NaOH solution of 1mol / L and the H of 0.5mol / L 2 SO 4 The solution adjusts the pH of the water sample to 7, using Na 2 SO 4 Adjust the conductivity to 1500μS / cm;

[0055] A method for removing ammonia nitrogen from water using a three-dimensional electrode, comprising the following steps:

[0056] Such as figure 1 As shown, connect the device;

[0057] Turn on the peristaltic pump, waste water is sent into described electrolyzer, control peristaltic pump rotating speed is 9rpm, and now the hydraulic retention time of waste water in electrolyzer is 16min;

[0058] Before powering on, feed enough waste water containing ammonia nitrogen into the electrolytic cell until the concentration of ammonia nitrogen in the effluent is consistent with that of the influent water, so that the zeolite in the ...

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Abstract

The invention relates to a method for removing ammonia nitrogen in waste water by a three-dimensional electrode in an electrolytic bath. The method comprises the following steps: feeding the waste water in the electrolytic bath to enable the waste water to keep a certain hydraulic retention time in the electrolytic bath; adopting a particle electrode in the three-dimensional electrode to absorb ammonia nitrogen in the waste water; adopting a power supply to enable the electrolytic bath to be electrified and keep certain current density, and adopting the cathode and the anode in the three-dimensional electrode to electrolyze ammonia nitrogen in the waste water and the particle electrode to obtain treated waste water and a reproducing particle electrode; feeding the treated waste water into the electrolytic bath, and adopting a water collecting tank to collect the treated waste water.

Description

technical field [0001] The invention relates to a method for removing ammonia nitrogen by a three-dimensional electrode, in particular to a method for removing ammonia nitrogen in a water body by utilizing the synergistic effect of electrochemical oxidation and zeolite adsorption-ion exchange. Background technique [0002] At present, ammonia nitrogen has become one of the main pollutants in industrial, domestic and agricultural wastewater. The ammonia nitrogen in the wastewater will consume the dissolved oxygen in the water body during the process of being oxidized by microorganisms. Generally speaking, the ammonia nitrogen in the water body will be oxidized to nitrate under the action of nitrifying bacteria. The complete oxidation of 1g of ammonia nitrogen to nitrate needs to consume 4.6g of oxygen. A high concentration of ammonia nitrogen is toxic to aquatic organisms such as fish in the water body. Studies have shown that during fish farming, ammonia nitrogen can cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F1/28
Inventor 李亮黄远星宋翠红许智华周悦梅崔晨晨
Owner UNIV OF SHANGHAI FOR SCI & TECH
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