A microbial fuel cell toxicity sensor and its operating method

A fuel cell and operating method technology, applied to instruments, scientific instruments, analytical materials, etc., can solve the problems of limiting the expansion of the implementation and application of sensors, external circulation pipes are easily corroded, and insufficient cleaning, etc., to achieve rapid warning of water toxicity Effect, improvement of sewage treatment equipment, effect of short detection time

Inactive Publication Date: 2019-08-13
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited voltage and output power of the MFC, the wastewater needs to be reconfigured after each test to increase the voltage. For reactors with insufficient cleaning and poor voltage recovery effect, re-cleaning or multiple water changes are required.
With the detection of high-concentration heavy metal wastewater, the external circulation pipeline is easily corroded or even more likely to be blocked. The pipeline should be replaced in time and the circuit should be checked
Therefore, the sensor has high requirements for the reading and operating environment, and at the same time limits the expansion of the implementation and application of the sensor. Further exploration and research are required for dry sensors.

Method used

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  • A microbial fuel cell toxicity sensor and its operating method
  • A microbial fuel cell toxicity sensor and its operating method
  • A microbial fuel cell toxicity sensor and its operating method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0062] Example 1 Cr in water 6+ detection

[0063] Starting from the low concentration of chromium (VI) ions, the sensor is impacted, the change of its voltage is recorded, and the value of the inhibition rate is calculated ( Figure 4 ). Among them, in the detection range (0.3 ~ 10mg / L), the heavy metal concentration and the inhibition rate show a good linear relationship, and a linear equation is obtained: R Cr =5.879C Cr +1.259(R 2 = 0.9597).

example 2

[0064] Example 2 Cd in water 2+ detection

[0065] Establish multiple groups of double-chamber MFC reactors, and perform detection experiments and fittings in the same way ( Figure 5 ). Among them, in the detection range (0.4~10mg / L), the heavy metal concentration and the inhibition rate present a good linear relationship, and a linear equation is obtained: R Cd =8.529C Cd -2.869(R 2 = 0.9795).

example 3

[0066] Example 3 Cu in water 2+ detection

[0067] Establish multiple groups of double-chamber MFC reactors, and perform detection experiments and fittings in the same way ( Image 6 ). The inhibition rate has always shown a good linear relationship with the copper ion concentration, but when the copper ion concentration is 160mg / L, a blue precipitate of copper appears in the solution, which will reduce the copper ion concentration in the solution, so it exceeds 160mg / L The copper concentration will no longer be detectable with this sensor. The detection range of copper is 40~160mg / L, and the linear equation can be obtained within the detection range: R Cu =0.368C Cu -10.197(R 2 = 0.9441).

[0068] Sensor repeatability experiment: In order to enable the sensor to operate for a long time, the heavy metal sensor requires stability and accuracy. After the reactor had been running stably for more than three months, 8 groups of concentrations within the detection range were ...

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Abstract

The invention discloses a microbial fuel cell toxicity sensor and an operation method and belongs to the technical field of new energy and environmental engineering. A reaction device is a double-chamber MFC and is partitioned by a cation exchange membrane; a cathode chamber contains a nutrient solution and is used for aeration; meanwhile, the cathode chamber communicates with a nutrient solution tank through a peristaltic pump and forms a circulating pipe; an anode chamber contains heavy metal wastewater; the anode chamber communicates with a heavy metal wastewater tank through the peristaltic pump and forms a circulating pipe; a carbon brush is adopted as an anode material of the anode chamber and a carbon felt is adopted as a cathode material of the cathode chamber; a cathode and an anode are connected together through an additional resistor and two ends of the additional resistor are connected with voltage data collection systems; and toxicity detection can be carried out after the voltage is stable under the optimal condition. The cathode chamber is used for automatically preparing a nutrient solution in cycle and carrying out aeration; and the anode chamber is used for circulating heavy metal-containing wastewater. Detection is carried out from the minimum concentration of a toxic substance, and the removal rate can reach over 90% when the voltage is stable after operation for 12h.

Description

technical field [0001] The invention belongs to the technical field of new energy and environmental engineering, and in particular relates to a novel microbial fuel cell toxicity sensor. Through the method, toxic substances in water can be directly monitored online and an early warning device can be designed according to the percentage of inhibition rate. Background technique [0002] Heavy metals in water mainly come from the natural environment and human activities. Heavy metals enter the environment and undergo continuous migration and transformation, causing serious secondary pollution. Antibiotics refer to a class of secondary metabolites with anti-pathogen or other activities, and a class of chemical substances that can interfere with the development and function of other living cells. They can be extracted or chemically synthesized from microbial culture fluids and metabolites of higher animals and plants. with semi-synthetic compounds. The widespread abuse of antibi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01N33/18
CPCG01N27/416G01N33/1813G01N33/1866
Inventor 海热提·吐尔逊高艳梅王晓慧李媛刘睿谢涛
Owner BEIJING UNIV OF CHEM TECH
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