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Device and method for desalination of cylindrical bio-cathode microbial desalination fuel cell

A technology of microbial desalination and biocathode, which is applied in the field of cylindrical biocathode microbial desalination fuel cell desalination device, can solve the problems of high cost of Pt/C, low desalination efficiency, and limitation of practical application, and achieve simple structure and high desalination rate , the effect of convenient operation

Active Publication Date: 2017-05-31
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of using potassium ferricyanide as the cathode, not only the potassium ferricyanide is consumed and the cost is high, but also the used potassium ferricyanide will cause secondary pollution to the environment
While Pt / C is used as the air cathode of the catalyst, although it will not cause pollution, the high cost of Pt / C limits its practical application.
In terms of configuration, the existing reactors mostly adopt "H" structure, the exchange area between the anode chamber, cathode chamber and desalination chamber is small, and the desalination efficiency is not high

Method used

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specific Embodiment approach 1

[0024] Specific implementation mode one: as figure 1 As shown, a cylindrical biocathode microbial desalination fuel cell desalination device, the device includes an external resistance 1, an external circuit 2, an anolyte outlet 3, a cathode and a cathode biofilm 4, a catholyte 5, and a cation exchange membrane 6 , desalination chamber 7, catholyte water inlet 8, catholyte water outlet 8a, cathode chamber top cover 9, anion exchange membrane 10, anode and anode biofilm 11, anolyte 12, tubular reactor shell 13, anolyte water inlet 14. Aeration head 15, bracket 16 (made of plexiglass material), water inlet 17 of desalination chamber (made of plexiglass material), water outlet 18 of desalination chamber (made of plexiglass material);

[0025] The reactor is a sleeve-shaped structure, the bottom end of the reactor is a closed end, and the top end is an open end. The reactor is made of a cylindrical reactor shell 13 (made of plexiglass, with a thickness of 5 mm), and a cation excha...

specific Embodiment approach 2

[0026] Specific implementation mode two: as figure 1 As shown in the specific embodiment 1, the cylindrical biocathode microbial desalination fuel cell desalination device, the resistance value of the external resistance 1 at startup is 500~2000Ω, and the resistance value at the operation stage is 10~200Ω.

specific Embodiment approach 3

[0027] Specific implementation mode three: as figure 1 As shown, the device for desalination of the tubular biocathode microbial desalination fuel cell described in the specific embodiment one or two, the composition and proportioning of the catholyte 5 are NaHCO 3 2 g / L, KH 2 PO 4 4.4 g / L, K 2 HPO 4 •3H 2 O 3.4 g / L, NH4 Cl 1 g / L, MgCl 2 •6H 2 O 0.1 g / L, CaCl 2 • 2H 2 O 0.1 g / L, yeast extract 0.1 g / L and trace metal solution 10 mL; the composition and proportioning of the trace element metal solution are: NiCl 2 ·6H 2 O0.024 g / L; Na 2 WO 4 2H 2 O 0.025 g / L; Na 2 MoO 4 0.025 g / L; FeSO 4 ·7H 2 O 0.1 g / L; CaCl 2 2H 2 O 0.1 g / L; CoCl 2 ·6H 2 O 0.1 g / L; CuSO 4 ·5H 2 O 0.01 g / L; KAl(SO 4 ) 2 12H 2 O 0.01 g / L; Boric acid 0.01 g / L; Zinc chloride 0.13 g / L; Manganese sulfate 0.5 g / L; Nitrilotriacetic acid 2.0 g / L; Magnesium sulfate 3.0 g / L;

[0028] The composition and proportioning ratio of the anolyte are: sodium acetate 1.64 g / L, KH 2 PO 4 4.4g / L, K 2 H...

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Abstract

The invention belongs to the field of seawater and brackish water desalination, microbial electrochemistry and microbial desalination fuel cells, and relates to a device and method for desalination of a cylindrical bio-cathode microbial desalination fuel cell. The device is composed of a resistor, an external circuit, an anolyte water outlet, a cathode and cathode bio-membrane, a catholyte, a cation exchange membrane, a desalination chamber, a catholyte inlet, a catholyte outlet, a cathode chamber top cover, an anion exchange membrane, an anode and anode bio-membrane, an anolyte, a cylindrical reactor shell, an anolyte inlet, an aeration head and a support. The method includes the first step of anaerobic acclimation of anode microorganisms, the second step of start of an MDC reactor, the third step of desalination operation of the MDC, and the fourth step of setting of the continuous flow operation condition. The device and method have the advantages that the device and method are suitable for being applied in practice; the maximum power density can reach 6.21 W / m<3>; in sequencing-batch operation, the desalination speed is 95.5 mg / h; the device is simple in structure, convenient to operate, low in cost and high in speed.

Description

technical field [0001] The invention relates to the fields of desalination of seawater and brackish water, microbial electrochemical systems, and microbial desalination fuel cell systems, in particular to a cylindrical biocathode microbial desalination fuel cell desalination device and method. Background technique [0002] A microbial desalination fuel cell (MDC) is a device capable of simultaneously generating electricity, desalination, and organic matter removal. Its basic configuration is a three-chamber structure, namely an anode chamber, a desalination chamber and a cathode chamber. An anion exchange membrane is placed between the anode chamber and the desalination chamber; a cation exchange membrane is placed between the desalination chamber and the cathode chamber. Under anaerobic conditions, microorganisms on the anode surface decompose organic substrates in the anolyte, producing electrons and H + ; Electrons reach the surface of the cathode through the external ci...

Claims

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Application Information

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IPC IPC(8): H01M8/16C02F3/00C02F3/30C02F3/34
CPCC02F3/005C02F3/301C02F3/34C02F2203/006H01M8/16Y02E60/50
Inventor 张慧超安众一
Owner YANTAI UNIV
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