Method for removing ammonia nitrogen through three-dimensional pulse electrolysis

A technology of pulse electrolysis and ammonia nitrogen, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., to achieve the effect of low price, high efficiency removal and corrosion reduction

Inactive Publication Date: 2017-07-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of corrosion of mechanical equipment caused by the use of a high chloride ion concentration system to remove ammonia nitrogen in wastewater in the prior art, and to reduce the energy consumption of ammonia nitrogen treatment by electrochemical oxidation

Method used

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  • Method for removing ammonia nitrogen through three-dimensional pulse electrolysis

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Effect test

Embodiment 1

[0032] A method for removing ammonia nitrogen by three-dimensional pulse electrolysis is characterized in that it includes several sets of processing systems.

[0033] like figure 1 The single treatment system shown includes: power supply 1 , cathode and anode plates 2 , particle electrodes 3 , electrolytic tank 4 , constant current circulation pump 5 and circulation water container 6 .

[0034] The electrolytic cell 4, the constant-current circulating pump 5 and the circulating water container 6 are connected through relevant pipelines to form a closed loop. The constant current circulation pump 5 is connected to the water inlet end of the electrolytic cell 4 . The circulating water container 6 is connected to the water outlet of the electrolytic cell 4 .

[0035] Several groups of cathode and anode plates 2 are arranged inside the electrolytic cell 4 . The cathode and anode plates 2 are perpendicular to the water inlet direction and the water outlet direction of the elect...

Embodiment 2

[0040] A method for three-dimensional pulse electrolytic removal of ammonia nitrogen, characterized in that, using the system in Example 1, the following steps are carried out:

[0041] 1) Configure simulated ammonia nitrogen wastewater: the concentration range of ammonium sulfate is 318.6g / L, the concentration range of sodium sulfate is 10g / L, and the concentration range of sodium chloride is 125mg / L;

[0042] 2) The distance between the pole plates in the electrolytic cell 4 is 5mm, the total filling amount of coconut shell activated carbon is 130g, and the current density is 109.65mA / cm 2 , the flow range of the constant-current pump is 500-1000mL / h, measure 650mL of simulated distribution water in step 1), load pulse current electrolysis for 300min, and the removal rate of ammonia nitrogen in the simulated distribution water reaches 78.11%;

[0043] The anode plate is reticulated titanium plated ruthenium iridium (size: 57mm*76mm*1mm), and the cathode plate is reticulated ...

Embodiment 3

[0046] A method for three-dimensional pulse electrolytic removal of ammonia nitrogen, characterized in that, using the system in Example 1, the following steps are carried out:

[0047] 1) Configure simulated ammonia nitrogen wastewater: the concentration range of ammonium sulfate is 318.6g / L, the concentration range of sodium sulfate is 10g / L, and the concentration range of sodium chloride is 155mg / L;

[0048] 2) The distance between the pole plates in the electrolytic cell 4 is 5mm, the total filling amount of coconut shell activated carbon is 130g, and the current density is 109.65mA / cm 2 , the flow range of the constant-current pump is 500-1000mL / h, measure 650mL of simulated distribution water in step 1), load pulse current electrolysis for 300min, and the removal rate of ammonia nitrogen in the simulated distribution water reaches 98.01%;

[0049] The anode plate is reticulated titanium with ruthenium-plated iridium (size: 57mm*76mm*1mm), and the cathode plate is reticul...

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Abstract

The invention discloses a method for removing ammonia nitrogen through three-dimensional pulse electrolysis. The method is characterized by comprising multiple groups of processing systems, wherein single processing system comprises a power supply, cathode-anode plates, particle electrodes, an electrolytic cell, a constant-current circulating pump and a circulating water container; each electrolytic cell, the corresponding constant-current circulating pump and the corresponding circulating water container are connected through a related pipe to form a closed loop; multiple groups of cathode-anode plates are arranged in each electrolytic cell; anode plates of the cathode-anode plates are mesh titanium-plated ruthenium-iridium and cathode plates are mesh stainless steel; two ends of each cathode-anode plate are connected with a cathode and an anode of the corresponding power supply separately; each power supply is a numerically controlled dual-pulse electroplating power supply; and two sides of each cathode-anode plate are filled with corresponding particle electrodes. Electric energy is provided by each dual-pulse electroplating power supply, so that, compared with a traditional DC power supply, concentration polarization caused by electrode potential deviating from balance potential due to the fact that the ion concentration of an electrode interface layer solution is different from the concentration of a body solution can be reduced, and meanwhile, the unit energy consumption is reduced by 30-60%.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a three-dimensional pulse electrolytic method for removing ammonia nitrogen. Background technique [0002] With the development of industry, agriculture, and animal husbandry, a large amount of untreated ammonia nitrogen wastewater is discharged into the environment indiscriminately, and the discharge is increasing year by year. The rapid growth and reproduction of plants leads to the production of organic matter in the water body faster than the speed of water consumption, resulting in eutrophication of the water body, destroying the ecological balance of the water body, further deteriorating the water quality, causing a large number of aquatic organisms to die, and even causing the lake to degrade or even disappear. On the other hand, ammonia nitrogen decomposes to produce nitrate and nitrite through the nitrification of nitrifying bacteria in the water body. Human beings dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/461C02F2001/46133
Inventor 唐金晶袁玉南马小霞陶长元刘仁龙刘作华舒建成孔令峰任霜霜吴燕翔
Owner CHONGQING UNIV
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