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Water quality monitoring method based on continuous flow membraneless biocathode microbial fuel cell

A fuel cell and water quality monitoring technology, applied in biochemical fuel cells, measuring devices, analytical materials, etc., can solve problems such as failure of early warning, weakening of output signal decline of toxic pollutants, etc., to prolong service life, reduce construction cost, The effect of maintaining pH balance

Active Publication Date: 2020-09-15
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the anode of MFC as the sensing element has a principle defect in monitoring such pollution, that is, the increase in the concentration of organic matter will increase the metabolic activity of electrochemically active microorganisms, weaken the amplitude of the output signal drop caused by toxic pollutants, and lead to early warning failure.

Method used

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  • Water quality monitoring method based on continuous flow membraneless biocathode microbial fuel cell
  • Water quality monitoring method based on continuous flow membraneless biocathode microbial fuel cell
  • Water quality monitoring method based on continuous flow membraneless biocathode microbial fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The composition of a specific continuous flow membraneless biocathode microbial fuel cell provided by the invention is as figure 2 As shown, the continuous flow membraneless biocathode microbial fuel cell 1 includes an anode detection unit 2 , a cathode detection unit 9 and a cathode-anode communication pipe 8 .

[0025] The shape of the anode detection unit 2 is a cuboid, and the inside is a cylindrical cavity with a diameter of 3 cm, a height of 4 cm, and a volume of 28 mL. An anode carbon cloth electrode 4 is placed inside the cavity, and the surface of the electrode is covered with electrochemically active microorganisms. For the anaerobic biofilm formed, the top of the anode detection unit 2 is provided with an anode electrode hole 6 , and the anode carbon cloth electrode 4 is led out through a titanium wire 5 and connected to the control unit 17 . The side wall of the anode detection unit 2 is respectively provided with an anode water inlet 3 and an anode water o...

Embodiment 2

[0031] In this example combine Figure 4 , indicating that the method provided by the invention is used to monitor the output current change of a single toxic pollution event.

[0032] The amount of sodium acetate added in the pretreatment step is 0.082g / L, and the water sample to be tested does not contain organic matter before treatment, so after pretreatment, sodium acetate is used as a single organic compound in the standard water sample and the water sample to be tested, and its concentration is 0.082g / L. Add heavy metal mercury to the water sample to be tested, so that Hg 2+ The final concentration is 1.5mg / L, simulating a single toxic pollution event. The water sample inlet flow rate was set at 2mL / min, and the detection time was 30min.

[0033] like Figure 4 As shown, during the detection process, the output current I of the continuous flow membraneless biocathode microbial fuel cell II fed with standard water 2 It is always stable at 45.2±0.1μA, while the output...

Embodiment 3

[0035] In this example combine Figure 5 , indicating that the method provided by the invention is used to monitor the output current change of the organic matter overload event.

[0036] The amount of sodium acetate added in the pretreatment step is 0.082g / L, and the water sample to be tested contains 0.082g / L sodium acetate before treatment, so after pretreatment, the sodium acetate concentrations in the standard water sample and the water sample to be tested are respectively 0.082g / L and 0.164g / L. The water sample inlet flow rate was set at 2mL / min, and the detection time was 30min. like Figure 5 As shown, the output current I of the microbial fuel cell I 1 After passing through the water sample to be tested, it will decrease significantly, while the output current I of the microbial fuel cell II 2 keep it steady. The value of the current change coefficient R varies with I 1 If it exceeds 20 after 18 minutes of passing through the water sample to be tested, it is jud...

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Abstract

The invention discloses a water quality monitoring method based on a continuous-flow membraneless biocathode microbial fuel cell. The continuous-flow membraneless biocathode microbial fuel cell comprises an anode detection unit, a cathode detection unit and a cathode-anode communication pipe; a water sample is pretreated before entering the anode detection unit of the continuous-flow membranelessbiocathode microbial fuel cell; the water sample then enters the cathode detection unit via the cathode-anode communication pipe and flows out of the cathode detection unit; output current of the cathode-anode communication pipe, introduced to the pretreated water sample under test and a standard water sample so as to judge water quality condition of the water sample under test. The water qualitymonitoring method helps effectively monitor single toxic pollution, organic overload, toxic pollutant-organic composite pollution and other water quality anomalies, and is more widely applicable.

Description

technical field [0001] The invention belongs to the technical field of water quality biological toxicity monitoring, in particular to a water quality monitoring method based on a continuous flow membraneless biocathode microbial fuel cell. Background technique [0002] With the continuous advancement of my country's industrialization process and rapid economic development, the extensive use of various chemical products and human development and construction have caused serious pollution to the water environment. The development of online water quality monitoring methods to achieve early warning of water pollution will help reduce economic losses caused by sudden water pollution incidents and ensure ecological security. The measurement indicators of the existing online water quality monitoring system are mainly physical and chemical indicators such as chemical oxygen demand, pH, and electrical conductivity. Although these indicators can evaluate changes in water quality, they...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/403H01M8/16
CPCG01N27/403H01M8/16Y02E60/50
Inventor 刘红赵婷谢倍珍
Owner BEIHANG UNIV
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