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Synchronous denitrification and desulfurization method of sewage by microbial fuel cell

A fuel cell and microorganism technology, which is applied in the field of biological denitrification and sulfur removal of sewage, can solve the problems of increasing costs, unable to recover the energy of nitrogen and sulfur pollutants, etc., and achieve the effect of saving operating costs.

Active Publication Date: 2018-01-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiency that traditional biological denitrification and desulfurization technology cannot recover the energy contained in nitrogen and sulfur pollutants, microbial fuel cells need to increase the cost of denitrification and desulfurization separately, and provide a microbial Method for synchronously removing nitrogen and sulfide in sewage and recovering electric energy by fuel cell

Method used

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  • Synchronous denitrification and desulfurization method of sewage by microbial fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The cuboid double-chamber microbial fuel cell used in this test has a total effective volume of 300mL, of which the anode chamber and cathode chamber are each 150mL, and graphite brush fillers are hung inside as electrodes. The supernatant was hydromixed. Before the operation of the microbial fuel cell, the graphite brush is soaked in anaerobic sludge to absorb microorganisms. After a period of operation, the corresponding microorganisms can be propagated and enriched on the anode and cathode graphite brushes. The dual-chamber microbial fuel cell operates at 30°C, the resistance of the external circuit is set to 100Ω, and the hydraulic retention time of sewage is 2.8h. The specific operation is as follows:

[0040] 1) The sewage containing sulfide (56mgS / L) and ammonia nitrogen (17mgN / L) is injected into the anode chamber of the microbial fuel cell through the water inlet pump.

[0041] 2) The sulfide in the anode chamber is oxidized through spontaneous electrochemistry...

Embodiment 2

[0047] The cuboid double-chamber microbial fuel cell used in this test has a total effective volume of 300mL, of which the anode chamber and cathode chamber are each 150mL, and graphite brush fillers are hung inside as electrodes. The supernatant was hydromixed. Before the operation of the microbial fuel cell, the graphite brush is soaked in anaerobic sludge to absorb microorganisms. After a period of operation, the corresponding microorganisms can be propagated and enriched on the anode and cathode graphite brushes. The dual-chamber microbial fuel cell operates at 30°C, the resistance of the external circuit is set to 100Ω, and the hydraulic retention time of sewage is 2.8h. The specific operation is as follows:

[0048] 1) The sewage containing sulfide (126mgS / L) and ammonia nitrogen (17mgN / L) is injected into the anode chamber of the microbial fuel cell through the water inlet pump.

[0049] 2) The sulfide in the anode chamber is oxidized through spontaneous electrochemis...

Embodiment 3

[0055] The cuboid double-chamber microbial fuel cell used in this test has a total effective volume of 300mL, of which the anode chamber and cathode chamber are each 150mL, and graphite brush fillers are hung inside as electrodes. The supernatant was hydromixed. Before the operation of the microbial fuel cell, the graphite brush is soaked in anaerobic sludge to absorb microorganisms. After a period of operation, the corresponding microorganisms can be propagated and enriched on the anode and cathode graphite brushes. The dual-chamber microbial fuel cell operates at 30°C, the resistance of the external circuit is set to 100Ω, and the hydraulic retention time of sewage is 2.8h. The specific operation is as follows:

[0056] 1) The sewage containing sulfide (185mgS / L) and ammonia nitrogen (17mgN / L) is injected into the anode chamber of the microbial fuel cell through the water inlet pump.

[0057] 2) The sulfide in the anode chamber is oxidized through spontaneous electrochemis...

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Abstract

The invention provides a synchronous sewage denitrification and desulphuration method for a microbial fuel cell. The synchronous sewage denitrification and desulphuration method comprises the following specific steps: constructing a double-chamber type microbial fuel cell and setting a nitration reactor outside the microbial fuel cell; firstly pumping sewage containing sulfides and ammonia nitrogen into an anode chamber of the microbial fuel cell, eliminating sulfur pollution by utilizing self-power generation electrochemical action and microbial metabolism and transmitting generated electrons to a cathode through an external circuit; firstly enabling anode effluent of the microbial fuel cell to pass through the external nitration reactor so as to oxidize the ammonia nitrogen into nitrate nitrogen, and then enabling the anode effluent to enter a cathode chamber of the microbial fuel cell; removing nitrogen pollution by using the electrons transmitted from the external circuit as electron donors through microorganisms inside the cathode chamber; and generating a current in the external circuit in the process that the electrons are transmitted to the cathode through the external circuit from the anode so as to realize electric energy recycling. According to the method, synchronous denitrification and desulphuration of sewage containing nitrogen and sulfur is realized through the microbial fuel cell, and the method has the advantages of saving additional chemical agents, recycling electric energy and the like.

Description

technical field [0001] The invention relates to the technical field of sewage biological denitrification and sulfur removal, in particular to a method for synchronously removing nitrogen and sulfide in sewage by utilizing a microbial fuel cell. Background technique [0002] Biological denitrification and sulfur removal technology is the most economical and effective method to solve nitrogen and sulfur pollution in sewage, but traditional biological denitrification and desulfurization technology cannot recover the energy contained in nitrogen and sulfur pollutants when treating sewage. [0003] Microbial fuel cells developed in recent years can recover electrical energy while removing pollutants, for example, see document 1 (Rabaey K, Van de Sompel K, Maignien L, et al. Microbial fuel cells for sulfideremoval. Environmental science & technology, 2006, 40 (17 ):5218-5224.) and literature 2 (Clauwaert P, Rabaey K, Aelterman P, et al. Biological Denitrification in Microbial Fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0662H01M8/16C02F9/14C02F3/34C02F101/10C02F101/16
CPCC02F3/005C02F3/34C02F3/345C02F9/00C02F2101/101C02F2101/16C02F2201/009C02F2303/10H01M8/0662H01M8/0675H01M8/16Y02E60/50
Inventor 张少辉钟留香鲍任兵魏炎
Owner WUHAN UNIV OF TECH
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