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A method for electrochemically coupling anaerobic microorganisms to treat organic sewage

A technology for anaerobic microorganisms and organic sewage, which is applied in the field of organic sewage treatment of electrochemically coupled anaerobic microorganisms to assist fermentation and produce methane, and can solve the problems of difficult time and cost control, long fermentation period and complicated operation.

Active Publication Date: 2021-09-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can improve the stability of the entire system to a certain extent, but the operation is too complicated, and alkaline reagents need to be put in, which cannot be reused, and it is easy to cause pollution to the entire system. At the same time, the entire reaction needs to be carried out under medium temperature conditions.
[0004] The publication date is May 4, 2016, the publication number is CN105543285A, and the name of the invention is an invention patent for a method of improving the anaerobic fermentation of food waste to produce biogas. Adding water-soluble divalent iron salts can increase methane production and speed up the reaction to a certain extent, but the divalent iron added in this method can easily inhibit anaerobic bacteria, and at the same time, the time cost is very high due to the need to run at medium temperature for a long time. Difficult to control
[0005] In order to solve the problem that the existing anaerobic fermentation technology has a long fermentation period, needs to be operated under medium temperature conditions, and the system stability is not enough, it is urgent to find a method that can operate at room temperature with a short fermentation period and a stable system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Soak the anode carbon brush in acetone for 30 hours, take it out and wash it with deionized water, and heat-treat it in a muffle furnace at 470°C for 50 minutes;

[0024] 2. Sieve the activated sludge to remove large particles of impurities, let it stand for 24 hours, and then domesticate it under strict anaerobic conditions for 1 day; wash the activated carbon to remove impurities, dry it, crush it to 10-20 mesh, and ultrasonically treat it for 30 minutes After soaking in distilled water to remove impurities, take out and dry;

[0025] 3. Place the pretreated carbon brush in step 1 in a microbial fuel cell (mature MFCs system) for 8 days, until the microbial fuel cell generates a stable current, take out the anode, and arrange the carbon brush and cathode carbon in the anaerobic reactor Then put the activated sludge and activated carbon from step (2) into the anaerobic reactor, the mass ratio of activated carbon to activated sludge is 1:1; first, the landfill leacha...

Embodiment 2

[0029] 1. Soak the anode carbon mesh in acetone for 25 hours, take it out and wash it with deionized water, and heat-treat it in a muffle furnace at 450°C for 40 minutes;

[0030] 2. Sieve the activated sludge to remove large particles of impurities, let it stand for 25 hours, and then domesticate it under strict anaerobic conditions for 2 days; wash the activated carbon to remove impurities, dry it, crush it to 10-20 mesh, and ultrasonically treat it for 35 minutes After soaking in distilled water to remove impurities, take out and dry;

[0031] 3. Place the anode carbon mesh pretreated in step 1 in a microbial fuel cell (mature MFCs system) for 10 days, until the microbial fuel cell generates a stable current, take out the anode carbon mesh, and place the carbon mesh and cathode graphite plate in In the anaerobic reactor, then put the activated sludge and activated carbon from step (2) into the anaerobic reactor, the mass ratio of activated carbon to activated sludge is 1:2;...

Embodiment 3

[0035] 1. Soak the anode carbon paper in acetone for 26 hours, take it out and wash it with deionized water, and heat-treat it in a muffle furnace at 500°C for 35 minutes;

[0036] 2. Sieve the activated sludge to remove large particles of impurities, let it stand for 25 hours, and then domesticate it under strict anaerobic conditions for 3 days; wash the activated carbon to remove impurities, dry it, crush it to 10-20 mesh, and ultrasonically treat it for 40 minutes After soaking in distilled water to remove impurities, take out and dry;

[0037] 3. Place the anode carbon paper pretreated in step 1 in a microbial fuel cell (mature MFCs system) for 10 days, until the microbial fuel cell generates a stable current, take out the anode carbon paper, and place the carbon paper and cathode stainless steel mesh in In the anaerobic reactor, then put the activated sludge and activated carbon from step (2) into the anaerobic reactor, the mass ratio of activated carbon to activated slud...

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Abstract

The invention provides a method for electrochemically coupling anaerobic microorganisms to treat organic sewage. In the method, the anode is pretreated, and the pretreated anode is placed in a microbial fuel cell for cultivation until the microbial fuel cell generates a stable current, and then the anode is taken out. , put the anode and cathode in the anaerobic reactor, and then put the pretreated activated sludge and activated carbon into the anaerobic reactor; Add phosphate buffer solution in the solution, mix it and put it into the anaerobic reactor, seal it, apply a stable voltage under strict anaerobic conditions to treat high-concentration organic sewage, and collect the methane gas generated by the reaction; the present invention solves the existing anaerobic reactor Fermentation technology needs to operate under medium temperature conditions, long start-up time, poor interference ability, low methane production efficiency and other problems; it has the characteristics of shorter start-up period of anaerobic fermentation system, high methane production rate, and high COD removal rate.

Description

technical field [0001] The invention belongs to the technical field of organic sewage biological treatment, and in particular relates to an organic sewage treatment method in which electrochemically coupled anaerobic microorganisms assist fermentation and generate methane. Background technique [0002] With the advancement of human science and technology, the demand for energy is increasing, and the limited fossil fuels can no longer meet the human demand for efficient and clean energy. At the same time, with the rapid development of industry and the continuous improvement of people's living standards, there are There are more and more industrial and urban domestic sewage. High-concentration organic sewage contains a large amount of toxic organic substances, which will cause a lack of oxygen in the water body and lead to the death of a large number of organisms. The deterioration of water quality will cause the water body to lose its original value, and the pollution of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/28C02F3/34C02F101/30
CPCC02F3/005C02F3/2806C02F3/2893C02F3/34C02F2101/30
Inventor 瞿广飞邓继加宁平解若松李军燕赵驰
Owner KUNMING UNIV OF SCI & TECH
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