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Electrochemical microorganism autotrophic nitrogen removal sewage treatment method and system

A technology of sewage treatment system and sewage treatment method, which is applied in the direction of electrochemical biological combined treatment, biological water/sewage treatment, biological treatment device, etc., to achieve the effect of reducing cost, small footprint, and accelerating reaction and mass transfer efficiency.

Active Publication Date: 2016-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current applications of MEC in sewage treatment focus on the cathode production capacity, and the system that uses the combined effect of cathode and anode to couple the entire biological denitrification process has not been reported yet.

Method used

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  • Electrochemical microorganism autotrophic nitrogen removal sewage treatment method and system
  • Electrochemical microorganism autotrophic nitrogen removal sewage treatment method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A more detailed description of the system will be given in conjunction with the accompanying drawings:

[0043] See attached figure 1 , The system of the present invention includes a microbial airtight anaerobic electrolysis shell 1, and the material of the shell can be plexiglass or polyvinyl chloride (PVC). The side of the electrolytic cell close to the anode has a water inlet 5, including a water inlet pipe arranged at the water inlet 5 and a water inlet control valve for controlling the flow and / or on-off of the sewage inlet. The sewage to be treated enters the electrolytic cell from the water inlet 5, and the electrolytic cell is provided with a microbial anode 6 and a microbial cathode 9. The microorganisms enriched in the microbial anode 6 are short-range nitrifying microorganisms, and the microorganisms enriched in the microbial cathode 9 are denitrifying methane anaerobes. Oxygen oxidizing microorganisms, the materials used for the microbial anode 6 and the mi...

Embodiment 2

[0049] See attached figure 2 , same as example 1, the difference is that this example starts with CO 2 It is a carbon source, so the inorganic carbon source dosing port 10 is set at the bottom of the electrolytic cell, and CO is set at the inorganic carbon source dosing port 10 2 Aerator head 15. An anion exchange membrane 13 is arranged between the cathode and anode, and the electrolytic cell is divided into an anode chamber and a cathode chamber, so that the NO produced by the anode 2 - It is smoothly transferred to the cathode for subsequent reactions, and at the same time, CO 2 Fixed in the cathode chamber to ensure its full reaction. The first pH value monitoring probe 16, the second pH value monitoring probe 17, the first pH value adjustment port 18 and the second pH value adjustment port 19 are respectively arranged in the anode chamber and the cathode chamber to adjust the pH value caused by adding an anion exchange membrane. Changes in the pH of the anode and ca...

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Abstract

The invention discloses an electrochemical microorganism autotrophic nitrogen removal sewage treatment method and system. The system comprises a microorganism electrolytic tank shell, a sealed cover, a microorganism positive electrode, a microorganism negative electrode and a power supply, wherein the sealed cover covers the microorganism electrolytic tank shell to form a closed space; the microorganism positive electrode and the microorganism negative electrode are connected with a negative electrode and a positive electrode of the power supply respectively, a short-distance nitrification microorganisms are enriched on the microorganism positive electrode, and denitrification methane anaerobic oxidation microorganisms are enriched on the microorganism negative electrode; the side, close to the microorganism positive electrode, of the microorganism electrolytic tank shell is provided with a water inlet, and the side, close to the microorganism negative electrode, of the microorganism electrolytic tank shell is provided with a water outlet. An inorganic carbon source put-in opening is formed in the position, close to the microorganism negative electrode, between the microorganism positive electrode and the microorganism negative electrode. By means of one electrolytic tank, short-distance nitrification, electrochemical methane production and methane anaerobic oxidation are effectively coupled, reaction mass transfer efficiency is accelerated, occupied area is small, and capital construction investment is small.

Description

technical field [0001] The invention belongs to the field of wastewater biological treatment, and in particular relates to an electrochemical microbial autotrophic denitrification sewage treatment method and system. The system realizes the effective coupling of short-range nitrification-electrochemical methanation-methane anaerobic oxidation. Background technique [0002] At present, the main method of ammonia nitrogen wastewater treatment is the traditional nitrification-denitrification biological denitrification process, but because it requires an additional organic carbon source in the denitrification stage and produces greenhouse gas N 2 O, and thus received widespread attention. In order to solve these problems and achieve energy-saving and efficient sewage treatment, many innovative processes for biological denitrification of sewage have emerged in recent years. However, most of the existing processes are dedicated to the optimization of process parameters, which not ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/00C02F101/16
CPCY02W10/37C02F3/005C02F3/302C02F2101/16C02F2203/006
Inventor 胡振茹东云马茹姜丽萍
Owner SHANDONG UNIV
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