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Desalting method of combination of microbiological fuel cell and capacitive deionization

A capacitive deionization and fuel cell technology, applied in the field of desalination, can solve the problems of high cost and low desalination efficiency of ion exchange membranes, and achieve the effects of reducing costs, enhancing current collection, and excellent use effects

Inactive Publication Date: 2018-04-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution uses ion exchange membranes with high cost. The cathode and anode are not connected through the load, but only rely on the potential difference for ion migration. The two electrodes are not connected and do not generate external current for electrode regeneration, and only rely on the potential difference for ion migration and desalination. less efficient

Method used

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  • Desalting method of combination of microbiological fuel cell and capacitive deionization
  • Desalting method of combination of microbiological fuel cell and capacitive deionization
  • Desalting method of combination of microbiological fuel cell and capacitive deionization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Step 1. Fabrication of capacitive deionization electrode

[0062] The most important thing about capacitive deionization is the function of the electrode, and the function of the electrode mainly depends on the selection of the electrode material. The capacitive deionization electrode consists of two parts: one part is a titanium collector, and the other part is an activated carbon fiber. In order to better make the activated carbon fiber adhere to the titanium plate, the activated carbon fiber: acetylene black: polyvinylidene fluoride is used in a mass ratio of 8: After mixing at a ratio of 1:1, it is evenly coated on the surface of the titanium collector, and dried in an oven at 80°C to obtain the required electrode, that is, the capacitive deionization electrode.

[0063] Step 2, start-up of the microbial fuel cell;

[0064] Take an appropriate amount of fresh sludge from the secondary sedimentation tank of Qige Sewage Treatment Plant as the source of electricity-pr...

Embodiment 2

[0070] Step 1. Fabrication of capacitive deionization electrode

[0071] The most important thing about capacitive deionization is the function of the electrode, and the function of the electrode mainly depends on the selection of the electrode material. The capacitive deionization electrode consists of two parts: one part is titanium collector, and the other part is activated carbon fiber. In order to better make activated carbon fiber stick to the titanium plate, activated carbon fiber: acetylene black: polyvinylidene fluoride = 8:1: 1 After mixing, evenly coat on the surface of the titanium collector, and dry in an oven at 80°C to obtain the desired electrode.

[0072] Step 2. Start-up of the microbial fuel cell;

[0073] Take an appropriate amount of fresh sludge from the secondary sedimentation tank of Qige Sewage Treatment Plant as the source of electricity-producing microorganisms, pass the sludge through a 20-mesh sieve to filter out relatively large debris, and filte...

Embodiment 3

[0079] Step 1. Fabrication of capacitive deionization electrode

[0080] The most important thing about capacitive deionization is the function of the electrode, and the function of the electrode mainly depends on the selection of the electrode material. The capacitive deionization electrode consists of two parts: one part is titanium collector, and the other part is activated carbon fiber. In order to better make activated carbon fiber stick to the titanium plate, activated carbon fiber: acetylene black: polyvinylidene fluoride = 8:1: 1 After mixing, evenly coat on the surface of the titanium collector, and dry in an oven at 80°C to obtain the desired electrode.

[0081] Step 2. Start-up of the microbial fuel cell;

[0082] Use the commercially available strain Shewanella sp., No. 23931 (China Industrial Microorganism Culture Collection Management Center, CICC), to cultivate, take 20mL OD 600 Mix 1.0 bacteria solution and nutrient solution (1000mg sodium acetate, 50mL phosp...

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Abstract

The invention discloses a desalting method of a combination of a microbiological fuel cell and capacitive deionization. The method comprises the steps of 1, preparation of a capacitive deionization electrode, activated carbon fiber, acetylene black and polyvinylidene fluoride are mixed, evenly coated on the surface of a titanium collector, and the titanium collector is dried to form the capacitivedeionization electrode; 2, starting of the microbiological fuel cell, electricigens and nutrient solutions are mixed and put into an anode chamber, and the nutrient solutions are changed regularly; aqueous solutions containing potassium ferricyanide are added into a cathode chamber, a middle chamber between the anode chamber and the cathode chamber is separated by adopting the capacitive deionization electrode to form a desalination chamber, and the desalination chamber is provided with NaCl aqueous solutions; graphite felts are adopted as electrode materials of the cathode and anode electrodes, the cathode chamber, the anode chamber and the middle chamber are sealed areas and isolated from outer environment, and a device is operated; 3, electrode regeneration. According to the desaltingmethod of the combination of the microbiological fuel cell and the capacitive deionization, desalination can be conducted in a better way and effects are excellent after the microbiological fuel celland the capacitive deionization are combined.

Description

technical field [0001] The invention relates to the technical field of desalination methods, in particular to a desalination method using a microbial fuel cell combined with capacitive deionization. Background technique [0002] From the industrial revolution to the present, the living standards of human beings have been greatly improved, but human beings still have to face many crises, such as the shortage of various resources, among which the shortage of water resources has always troubled everyone. Although there is a large amount of water on the earth, most of it is seawater, and only a small part of it is fresh water. In addition, there are some fresh water that are difficult to be exploited by humans, such as water from glaciers and water from snow-capped mountains. Water, etc., so now there are a large number of sewage treatment plants and water companies, which can not only ensure that the generated sewage is treated in a timely manner and return to the human cycle, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F1/4604C02F3/005
Inventor 胡勤海王忠东应文婷徐俊鹏杨韦玲杨静泊
Owner ZHEJIANG UNIV
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