System and method by utilizing fuel cell to treat organic wastewater and synchronously repair soil heavy metal
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A fuel cell and organic wastewater technology, applied in chemical instruments and methods, restoration of polluted soil, biological water/sewage treatment, etc., can solve problems such as unfavorable soil follow-up cultivation, soil fertility decline, cumbersome operation and maintenance, etc., to speed up The effect of electron transfer rate, ensuring fertility and improving removal efficiency
Pending Publication Date: 2018-07-31
QINGDAO UNIV OF SCI & TECH
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Its disadvantage is that after the organic matter in the soil is degraded at the anode, it is easy to cause a decrease in soil fertility, which is not conducive to the subsequent cultivation of the soil. The difference in the composition and content of organic matter in the soil environment will also have a significant impact on the power generation performance of MFC. The presence of heavy metals can also have a toxic effect on electrogenic bacteria
In addition, the strict anaerobic environment of the anode needs to be maintained during the power generation process, and the operation and maintenance are cumbersome
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[0031] Such as figure 1 As shown, a system for fuel cell treatment of organic wastewater and synchronous restoration of soil heavy metals is characterized in that it includes a microbial fuel cell, a data acquisition control device and a soil electrokinetic restoration device;
[0032] Described microbial fuel cell is provided with anode chamber 1 and cathode chamber 5, is respectively provided with anode unit 2 and cathode unit 4 in described anode chamber 1 and cathode chamber 5, and described anode unit 2 is the graphite electrode with graphene attached to the surface, The cathode unit 4 is surface-attached MnO 2 The graphite electrode, the anode chamber 1 is provided with activated sludge, the cathode chamber 5 is provided with an electrolyte, the anode chamber 1 and the cathode chamber 5 are separated by a proton exchange membrane 3, and the anode unit 2 and the outer end of the cathode unit 4 are connected to an external resistor 18 through wires, the anode chamber 1 is...
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Abstract
The invention discloses a system and a method by utilizing a fuel cell to treat organic wastewater and synchronously repair heavy metal in soil. The system comprises a microbiological fuel cell, a data acquisition regulation and control device and a soil electrodynamic remediation device. One end of the data acquisition regulation and control device is connected with an anode unit and a cathode unit through lead wires correspondingly; the other end of the data acquisition regulation and control device is connected with a negative electron and a positive electrode through lead wires correspondingly; and the data acquisition regulation and control device is used for acquiring a voltage signal generated by the microbiological fuel cell and for regulating and controlling the magnitude of electric current received by the soil electrodynamic remediation device. By utilizing the microbiological fuel cell to treat organic wastewater, wastewater is treated, and electric energy is generated to remove the heavy metal in the soil; the system and the method do not damage a soil structure and the organic content in the soil is not affected; and at the same time, the data acquisition regulation and control device is adopted, so that the electric energy utilization efficiency of the microbiological fuel cell is improved effectively and the removal rate of the heavy metal in the soil is reduced.
Description
technical field [0001] The invention belongs to the field of microbial electrochemistry, and in particular relates to a system and a method for synchronously repairing heavy metals in soil with a fuel cell for treating organic wastewater. Background technique [0002] At present, my country's soil environment is generally not optimistic, and soil pollution in some areas is relatively serious, which has seriously affected people's production and life. In recent years, the incidents of "blood lead", "cadmium rice" and "arsenic poisoning" have made soil heavy metal pollution attract widespread attention. According to the "National Soil Pollution Survey Bulletin" (2014), the total excess rate of soil in the country is 16.1%, and the pollution type is mainly heavy metals. The over-standard rates of mercury, arsenic, copper, lead, chromium, zinc, and nickel were 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, and 4.8%, respectively. Therefore, it is of great significance to develop an...
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