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Electrochemical device and method for treating high-concentration ammonia organic wastewater and treatment method

A high-concentration technology for organic wastewater, applied in electrochemical and biological combination treatment, chemical instruments and methods, energy wastewater treatment, etc., can solve the problems of destroying the anaerobic environment of the anode, reducing the bioelectrochemical performance of the cathode, and consuming oxygen.

Active Publication Date: 2017-08-29
GUANGDONG UNIV OF TECH +2
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AI Technical Summary

Problems solved by technology

[0003] In recent years, bioelectrochemical technology has shown great application potential in the field of wastewater treatment. Its unique cathode and anode bioelectrochemical environment has created conditions for strengthening the removal of organic pollutants in wastewater and synchronous wastewater denitrification. However, according to existing research According to the report, there are the following technical problems: (1) Continuous flow operation is adopted, and the continuous input of the anode fluid into the cathode will bring in the organic carbon source, resulting in the growth of aerobic heterotrophic bacteria, consuming oxygen, and causing cathode polarization
(2) The use of aeration at the cathode requires additional energy consumption for ammonia nitrogen nitrification, and aeration and agitation can easily damage the biofilm on the cathode surface and reduce the bioelectrochemical performance of the cathode
(3) The ammonia nitrogen nitrification product of aerobic biological cathode - nitrate is refluxed to the anode for denitrification and denitrification, which will inevitably bring in oxygen, destroy the anaerobic environment of the anode, and reduce the bioelectrochemical removal efficiency of the anode for organic pollutants
The above problems will reduce the removal efficiency of organic pollutants and ammonia nitrogen

Method used

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  • Electrochemical device and method for treating high-concentration ammonia organic wastewater and treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The cathode and anode of the device are both cuboids (10cm×10cm×10cm) with a volume of 1L. The materials are all acrylic plates with good light transmission. The cathode and anode are separated by a cation exchange membrane. The anode is shaded with tin foil, and the cathode remains transparent.

[0060] (1) Domestication of the anode ammonia-nitrogen-resistant electroactive biofilm and the cathode algae denitrification biofilm: Add the sludge in the biochemical reactor for treating ammonia-nitrogen organic wastewater to the anode, the final concentration is: 2g VSS / L, and the concentration of injected ammonia nitrogen is 1000mg / L, simulated ammonia nitrogen organic wastewater with an organic matter concentration of 2200mg COD / L. The cathode is added to the sludge in the denitrification bioreactor, the final concentration is: 2g VSS / L, and the nitrogen-containing wastewater (<50mg COD / L) that has undergone anaerobic removal of organic pollutants is injected. At the sam...

Embodiment 2

[0064] On the basis of Example 1, lower the resistance to 100 ohms to reduce the electron transfer resistance, increase the light intensity to 7500lux, increase the discharge voltage of the silicon photocell to 0.5V, and other conditions are the same.

[0065] Under the above conditions, the TOC removal rate at the end of the cycle was 93.8%, the ammonia nitrogen removal rate was 84.8%, the nitrate removal rate was 86.5%, and the total nitrogen removal efficiency was 85.9%.

Embodiment 3

[0067] On the basis of Example 1, adjust the concentration of ammonia nitrogen in the influent to 100mg / L, the concentration of organic matter to 500mgCOD / L, and other conditions are equal.

[0068] Under the above conditions, the removal rate of TOC at the end of the cycle was 98.8%, the removal rate of ammonia nitrogen was 95.5%, the removal rate of nitrate was 96.7%, and the removal efficiency of total nitrogen was 93.2%.

[0069] As can be seen from the above examples, the present invention provides an electrochemical device for treating ammonia nitrogen organic wastewater, comprising a reaction chamber; a diaphragm arranged inside the reaction chamber; the diaphragm divides the reaction chamber into an anode chamber and a cathode chamber; The top of the anode chamber is provided with a water inlet, and the bottom of the cathode chamber is provided with a water outlet; the bottom of the anode chamber is provided with a pipeline with a valve that communicates with the top of...

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Abstract

The invention provides an electrochemical device and a method for treating high-concentration ammonia organic wastewater and a method. The device is divided into an anode chamber and a cathode chamber through a diaphragm; a water inlet is formed in the top part of the anode chamber; a pipeline with a valve communicated with the top part of the cathode chamber is arranged on the bottom part of the anode chamber; a water outlet is formed in the bottom part of the cathode chamber; an alga-bacteria biofilm is arranged on the surface of a cathode; an ammonia nitrogen-resistant electroactive biofilm is arranged on the surface of an anode; the cathode and the anode are connected with an adjustable resistor and a photocell controlled by a timing relay. The device respectively removes an organic matter and ammonia nitrogen on the anode and the cathode, prevents the influence on the cathode caused by that a continuous flow from bringingcarrys the organic matters from the anode so as to influence the cathode, and eliminates the phenomenon that a nitration liquid reflows to the anode so as to bring oxygen and nitrate to influence on the anode caused by that nitration liquid reflows to the anode and brings oxygen and nitrate in. A cathode algae alternative dark light reaction and phycomycete synergism are utilized, so that multi-way denitrification such as bio-nitrification-denitrification, electrochemical reduction and algae absorption is realized. Meanwhile, the photocell discharges to intensify the operation of a drive device at night. The device is self-controlled in energy, and can be used for sustainably and high-efficiently treating the high-concentration ammonia organic wastewater.

Description

technical field [0001] The invention relates to the technical field of ammonia-nitrogen organic wastewater treatment, in particular to an electrochemical device and a treatment method for treating high-concentration ammonia-nitrogen organic wastewater. Background technique [0002] With the rapid development of industry and agriculture, the discharge of high-concentration ammonia nitrogen organic wastewater has risen sharply. High-concentration ammonia-nitrogen organic wastewater comes from a wide range of sources, including wastewater discharged from food processing, aquaculture and chemical industries, and landfill leachate. High-concentration ammonia-nitrogen organic wastewater contains not only a large amount of easily degradable dissolved organic pollutants, but also persistent or toxic organic pollutants, which are extremely harmful to the ecological environment and human health. In addition, the high concentration of ammonia nitrogen is the chief culprit of eutrophic...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/30C02F3/32C02F101/16C02F101/30
CPCC02F3/005C02F3/302C02F3/325C02F2101/16C02F2101/30Y02W10/37
Inventor 孙健蔡碧海徐文静张亚平李冠群文静彭彦彬陈谷汎张耿崚郭家宏路星雯
Owner GUANGDONG UNIV OF TECH
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