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Method of simultaneously removing nitrogen and sulfide pollution by using three-chamber microbial fuel cell

A fuel cell and microorganism technology, which is applied in the fields of biochemical fuel cells, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of increasing costs, inability to recover nitrogen and sulfur pollutants, etc., and achieve the effect of saving operating costs.

Inactive Publication Date: 2017-11-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to overcome the deficiency that traditional biological denitrification and sulfur removal technology cannot recover the energy contained in nitrogen and sulfur pollutants, microbial fuel cells need to increase the cost of denitrification and sulfur removal separately, and simplify the external nitrification The complexity of denitrification process in series with denitrification of reactor and microbial fuel cell, recovering anode electrons as much as possible, providing a three-chamber microbial fuel cell method for synchronously removing nitrogen and sulfide in sewage and recovering electrical energy

Method used

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  • Method of simultaneously removing nitrogen and sulfide pollution by using three-chamber microbial fuel cell

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Effect test

Embodiment 1

[0055] The cuboid three-chamber microbial fuel cell used in this test has a total effective volume of 1200mL, of which the anode chamber, aerobic cathode chamber and anoxic cathode chamber are each 400mL, and carbon fiber brushes are hung inside as electrodes. The oxygen-deficient cathode chamber is stirred and mixed by a bottom magnetic stirring bar. Before the microbial fuel cell is operated, the carbon fiber brush is soaked in sludge to absorb microorganisms. Soak the carbon fiber brush in the sludge for a day and night, and then place it in the three-chamber microbial fuel cell and run it for a period of time. Corresponding electroactive microorganisms can be propagated and enriched on the anode, aerobic cathode and anoxic cathode carbon fiber brushes. The three-compartment microbial fuel cell operates at 30°C, and the resistance R of the external circuit is set 1 100Ω, the resistor R 2 is 20Ω, and the water change cycle of the three reaction chambers is 22h. The specif...

Embodiment 2

[0065] The cuboid three-chamber microbial fuel cell used in this test has a total effective volume of 1200mL, of which the anode chamber, aerobic cathode chamber and anoxic cathode chamber are each 400mL, and carbon fiber brushes are hung inside as electrodes. The oxygen-deficient cathode chamber is stirred and mixed by a bottom magnetic stirring bar. Before the operation of the microbial fuel cell, the carbon fiber brushes are soaked in the sludge to absorb microorganisms. After being inoculated into the reactor and operated for a period of time, the corresponding microorganisms can be propagated and enriched on the anode, aerobic cathode and anoxic cathode carbon fiber brushes. The three-compartment microbial fuel cell operates at 30°C, and the resistance R of the external circuit is set 1 100Ω, the resistor R 2 is 20Ω, and the water change cycle of the three reaction chambers is 22h. The specific operation is as follows:

[0066] 1) Pass the sewage containing sulfide (194m...

Embodiment 3

[0075] The cuboid three-chamber microbial fuel cell used in this test has a total effective volume of 1200mL, of which the anode chamber, aerobic cathode chamber and anoxic cathode chamber are each 400mL, and carbon fiber brushes are hung inside as electrodes. The oxygen-deficient cathode chamber is stirred and mixed by a bottom magnetic stirring bar. Before the operation of the microbial fuel cell, the carbon fiber brushes are soaked in the sludge to absorb microorganisms. After being inoculated into the reactor and operated for a period of time, the corresponding microorganisms can be propagated and enriched on the anode, aerobic cathode and anoxic cathode carbon fiber brushes. The three-compartment microbial fuel cell operates at 30°C, and the resistance R of the external circuit is set 1 100Ω, the resistor R 2 is 20Ω, and the water change cycle of the three reaction chambers is 22h. The specific operation is as follows:

[0076] 1) Pass the sewage containing sulfide (22...

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Abstract

Then invention discloses a method of simultaneously removing nitrogen and sulfide pollution by using a three-chamber microbial fuel cell. The method comprises the following steps: constructing the three-chamber microbial fuel cell; introducing wastewater containing sulfides into an anode chamber of the microbial fuel cell to remove sulfur pollution by using spontaneous electrochemical actions and microbial metabolism, and transferring generated electrons to an aerobiotic cathode and an anoxic cathode through an external circuit; introducing wastewater containing ammonia nitrogen into the aerobiotic cathode, in which aerobiotic electroactive microorganisms take oxygen as electron acceptors to oxidize electrons which are transferred from the external circuit to generate electric energy and at the same time, nitrifying bacteria oxidize ammonia nitrogen in the wastewater into nitrate nitrogen; and introducing discharged water of the aerobiotic cathode into the anoxic cathode, in which electroactive denitrifying bacteria take electrons which are transferred from the external circuit as electron donors to finish denitrification processes. The method provided by the invention simultaneously removes nitrogen and sulfide pollution in wastewater by using the microbial fuel cell, and has the advantages of saving added chemical agents and recycling electric energy.

Description

technical field [0001] The invention relates to the technical field of sewage biological denitrification and desulfurization, in particular to a method for synchronously removing nitrogen and sulfide pollution by a three-chamber 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 can use organic or inorganic substances in sewage as substrates, and recover the energy contained in pollutants while removing pollutants. It has good development prospects in the field of wastewater denitrification or wastewater desulfurization. For example, see Document 1 (Sun H, Xu S, Zhuang G, Zhuang X.2016.Performance and recent improvement inmicrobial fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/30C02F3/34H01M8/16C02F101/16
CPCC02F3/005C02F3/302C02F3/34C02F2101/101C02F2101/16C02F2203/006C02F2303/10H01M8/16Y02E60/50Y02W10/30
Inventor 张少辉魏霞鲍任兵钟留香
Owner WUHAN UNIV OF TECH
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