Method and device for electrochemical system coupled sulfur autotrophic denitrification

An autotrophic denitrification and electrochemical technology, applied in the field of water treatment, to achieve efficient denitrification effect

Inactive Publication Date: 2019-02-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although urban sewage treatment plants can reduce most pollutants through biochemical treatment, the concentration of nitrogen in the effluent is still high, so the high nitrogen content in the effluent of urban sewage treatment plants is still the main cause of water eutrophication

Method used

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  • Method and device for electrochemical system coupled sulfur autotrophic denitrification
  • Method and device for electrochemical system coupled sulfur autotrophic denitrification
  • Method and device for electrochemical system coupled sulfur autotrophic denitrification

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a device for coupling an electrochemical system to sulfur autotrophic denitrification, see figure 1 As shown, the device for coupling the electrochemical system to sulfur autotrophic denitrification includes a reactor 1, an electrochemical assembly 2 and sulfur particles 3, wherein: the reactor 1 includes a water inlet 11 and a water outlet 12; the electrochemical assembly 2 is arranged in the reaction In the device 1, the electrochemical component 2 includes an anode 21 and a cathode 22. The material of the anode 21 is carbon, and the material of the cathode 22 is conductive metal; the surface of the cathode 22 is enriched with autotrophic denitrifying functional bacteria; sulfur particles 3 are filled in the electrochemical In component 2; the surface of sulfur particle 3 is enriched with autotrophic denitrifying functional bacteria.

[0033] In the electrochemical system coupled sulfur autotrophic denitrification device provided in this examp...

Embodiment 2

[0049] On the basis of Example 1, the shape of the cathode 22 of the electrochemical component 2 in the device for coupling the electrochemical system to sulfur autotrophic denitrification provided in this example is a mesh structure.

[0050] The cathode 22 is designed as a mesh structure, on the one hand, it is beneficial to increase the surface area of ​​the cathode 22, so that more autotrophic denitrification functional bacteria are enriched on the surface of the cathode 22; The autotrophic denitrification functional bacteria enriched on the wells are fully exposed, thereby improving the treatment capacity of nitrate in the sewage by the hydrogen autotrophic denitrification method; and because the hydrogen autotrophic denitrification method will consume sulfur during the reaction H produced during + , so as to further promote the sulfur autotrophic denitrification reaction, so that the electrochemical system coupled sulfur autotrophic denitrification device can achieve eff...

Embodiment 3

[0065] On the basis of Example 2, the reactor 1 in the electrochemical system coupled sulfur autotrophic denitrification device provided in this example is an upflow reactor.

[0066] The reactor 1 is designed as an upflow reactor, so that the water to be treated enters from the lower part of the reactor 1, and the treated water flows out from the upper part of the reactor 1; the upflow reactor is selected as the reactor 1, which is conducive to filling Throughout the reactor 1, the water entering the reactor 1 needs to move from the bottom to the top of the reactor 1 before it can flow out from the water outlet 12, so as to ensure that the water is fully in contact with the electrochemical components 2 and the sulfur particles 3 in the reactor 1, ensuring The reaction is fully carried out, thereby promoting the denitrification effect of the method of coupling sulfur autotrophic denitrification with the electrochemical system.

[0067] In order to further increase the sufficie...

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Abstract

The invention provides a method and device for electrochemical system coupled sulfur autotrophic denitrification, and relates to the field of water treatment. The device for electrochemical system coupled sulfur autotrophic denitrification comprises a reactor, an electrochemical component and sulfur particles, wherein the reactor comprises a water inlet and a water outlet; the electrochemical component is arranged in the reactor and comprises an anode and a cathode; the anode is made from carbon and the cathode is made from conductive metal; in a working state, autotrophic denitrification functional bacteria are enriched on the surface of the cathode; the sulfur particles fill the inside of the electrochemical component; in a working state, autotrophic denitrification functional bacteria are enriched on the surface of the sulfur particles. According to the device for electrochemical system coupled sulfur autotrophic denitrification provided by the invention, by coupling sulfur autotrophic denitrification with hydrogen autotrophic denitrification, fast and efficient nitrogen removal is realized under the action of a composite electron donor of sulfur, hydrogen and electrode.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and device for coupling an electrochemical system to sulfur autotrophic denitrification. Background technique [0002] Eutrophication of water body is a global phenomenon in recent decades. Affected by human activities, the discharge of nutrient elements in rivers, lakes and other water bodies tends to become eutrophic. When water eutrophication occurs, some algae will explode, resulting in the deterioration of water quality and hypoxia, destroying the stability of water ecosystem, and seriously affecting urban water supply and drinking water safety. The fundamental cause of water eutrophication is the increase of nutrient elements nitrogen and phosphorus. In order to solve the problem of water eutrophication, a large number of urban sewage treatment plants have been built in my country to make urban sewage treated and discharged to rivers and lakes. Although urban sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/00C02F101/16
CPCC02F3/005C02F3/286C02F3/2866C02F2101/163C02F2201/46
Inventor 王爱杰陈帆李智灵黄聪吕淼赵友康高翔宇
Owner HARBIN INST OF TECH
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