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Photo microbial fuel cell can be used for simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water, and applications thereof

A technology for simultaneous treatment of starch wastewater, applied in biochemical fuel cells, water pollutants, anaerobic digestion treatment, etc., can solve the problems of non-recycling, increased cost, low efficiency, etc., and achieve good electricity production performance

Active Publication Date: 2019-01-22
TAIYUAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of using biological methods alone to treat nitrogen-containing wastewater with low carbon sources, a large amount of additional carbon sources need to be supplemented, which increases costs and cannot recover energy, and the use of anaerobic biological methods alone to treat high-concentration starch wastewater has low efficiency, etc., provides A microbial fuel cell and its application for simultaneous treatment of high-concentration starch wastewater and nitrogen-containing wastewater without carbon sources. The microbial fuel cell utilizes the electronic complementarity of mixed bacteria to remove starch wastewater and sewage to remove nitrate nitrogen. The anode starch is used as the The electron donor, the nitrate in the cathode is the electron acceptor, which makes up for the lack of electron donor (or electron acceptor) in the traditional sewage treatment method for denitrification alone (or the treatment of high-concentration starch wastewater), and realizes the simultaneous treatment of high-concentration starch Wastewater and nitrogenous wastewater with low carbon-to-nitrogen ratio or even no carbon source, and the effect of energy recovery

Method used

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  • Photo microbial fuel cell can be used for simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water, and applications thereof
  • Photo microbial fuel cell can be used for simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water, and applications thereof
  • Photo microbial fuel cell can be used for simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Separation of anode mixed bacteria and detection of hydrogen production capacity using starch

[0037] The mixed photosynthetic bacteria in the anode chamber are separated and purified from the activated sludge in the secondary sedimentation tank of Taiyuan Sewage Plant. The specific culture method is: use a 250 ml Erlenmeyer flask as a culture container, and inoculate 20% of it in the logarithmic growth phase (OD value 1.6) of the seed solution, and then sealed with a rubber stopper. Using a 100 W incandescent lamp as the light source, anaerobic light cultivation was carried out at room temperature and 120 r / min under the light conditions of 4500 lux (detected by an illuminance meter).

[0038] The medium used for specific separation and purification is (g / L): MgCl 2 •6H 2 O 0.2g, CH 3 COONa•3H 2 O 3.0g, NH 4 Cl0.5g, Na 2 HPO 4 •12H 2 O 0.5g, NaCl 2.0g, peptone 1.0g, yeast extract 0.2g, trace element solution 1ml. Trace element solution (g / L): MnSO ...

experiment example 2

[0042] Experimental example 2: Selection of cathode nitrifying bacteria and test of utilization of nitrate nitrogen outside the battery

[0043] The nitrifying bacteria described in the cathode chamber are documents "Nitrogen removal characteristics of heterotrophic nitrification-aerobic denitrification by Alcaligenes faecalis C16, strains disclosed in Chinese Journal of Chemical Engineering, 23 (2015) 827–834.

[0044] For the test experiment of cathode nitrifying bacteria utilizing nitrate nitrogen, medium (g / L): sodium citrate 4.902, MgSO 4 ·7H 2 O 0.05, K 2 HPO 4 0.2, NaCl 0.12, MnSO 4 4H 2 O 0.01, FeSO 4 0.01.

[0045] Keeping the total nitrogen constant (100 mg / L), mix sodium nitrate and ammonium sulfate in different ratios in Table 1 as the nitrogen source

[0046] NH 4 -N content (%)

0

25

50

75

100

(NH 4 ) 2 SO 4 (g / L)

0

0.118

0.236

0.354

0.472

NaNO 3 (g / L)

0.608

0.456

0.304

0.152

...

experiment example 3

[0049] Experimental Example 3: Constructing a microbial fuel cell using anode bacteria and cathode bacteria

[0050] A microbial fuel cell that simultaneously treats high-concentration starch wastewater and nitrogen-containing wastewater without carbon sources, such as Figure 4 , Figure 5 As shown, it includes an anode chamber 1 and a cathode chamber 2 respectively provided with water inlets and outlets. The anode chamber 1 is a cylinder of organic glass, and the two sides of the anode chamber are circular; the inner wall of the anode chamber 1 is inscribed to fix the cathode chamber 2, The wall of the cathode chamber 2 is a sealed cylinder formed by bending the cation exchange membrane 3, and the two sides of the cation exchange membrane 3 are fixed on the circular plexiglass on both sides of the anode chamber; The anode carbon felt 4 and the cathode carbon brush 5 are installed on the inner side of the cation exchange membrane 3, and the anode carbon felt 4 and the cathod...

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Abstract

The invention belongs to the technical field of waste water processing with microbiological fuel cells, and discloses a photo microbial fuel cell can be used for simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water, and applications thereof. The photo microbial fuel cell can be used for simultaneous processing of high concentrationstarch waste water and carbon source-free nitrate-containing waste water is capable of solving problems in the prior art that in processing of low carbon source nitrogen-containing waste water with conventional biological method, extra carbon sources are needed, cost is increased, energy recycling is impossible to realize, and efficiency of single processing of high concentration starch waste water is low. According to the photo microbial fuel cell, a cathode chamber is fixedly arranged on the internal wall of an anode chamber, a cathode water inlet and a water outlet are arranged on two circular organic parts respectively, and are communicated with the outside part of the anode chamber through pipelines; an anode water inlet and the cathode water inlet, an anode water outlet and the cathode water outlet are arranged in the same directions; an anode carbon felt loaded with photosynthetic bacteria is arranged in the anode chamber, a cathode carbon brush loaded with nitrifying bacteria is arranged in the cathode chamber; a complete circuit is formed through connection of the anode and the cathode with an external resistor. Starch waste water COD removing rate ranges from 80 to 90%, nitrate nitrogen removing rate is higher than 95%, and simultaneous processing of high concentration starch waste water and carbon source-free nitrate-containing waste water is realized.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment by microbial fuel cells, and in particular relates to a microbial fuel cell for simultaneously treating high-concentration starch wastewater and carbon-source nitrogen-containing wastewater and an application thereof. Background technique [0002] With the development of society and economic progress, the level of global industrialization is getting higher and higher, and the resulting environmental problems are becoming more and more serious. For example, in terms of water pollution, the pollution of nitrogen-containing wastewater is particularly prominent. Traditional sewage treatment methods treat such Sewage needs to add additional carbon sources, increasing treatment costs. Therefore, it is very important to seek a sewage treatment technology with high efficiency, low operating cost, and the ability to remove nitrate under low carbon-to-nitrogen ratio conditions. [0003] Microb...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/34C02F3/28H01M8/16C02F101/30
CPCC02F3/005C02F3/28C02F3/34C02F2101/30H01M8/16Y02E60/50
Inventor 刘玉香梁涛李风雷任瑞鹏李亚青吕永康任玉莹
Owner TAIYUAN UNIV OF TECH
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