Microbial fuel cell for oil sludge treatment and synchronous reduction of soil hexavalent chromium

A fuel cell, hexavalent chromium technology, applied in sludge treatment, electrochemical sludge treatment, restoration of polluted soil, etc., can solve the problems of complex process, long treatment time, high treatment cost, and achieve high reduction efficiency, Low cost to build and operate, easy to manage and maintain

Pending Publication Date: 2019-12-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing oil sludge treatment methods have their own shortcomings and deficiencies: long treatment time, complicated process, high treatment cost, etc.

Method used

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  • Microbial fuel cell for oil sludge treatment and synchronous reduction of soil hexavalent chromium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]The housing 8 is provided with oily sludge 6 (thickness is 10cm) and hexavalent chromium-contaminated soil 7 (thickness is 10c). It comes from the heaping site. The housing 8 has a diameter of 15 cm and a height of 30 cm, and is made of plastic material. The cathode 1 is placed on the upper part of the hexavalent chromium-contaminated soil, which is a graphite plate with a length of 10 cm, a width of 10 cm, and a thickness of 0.5 cm. The anode 2 is placed in the oil sludge at the bottom of the housing 8, 20 cm below the cathode, and the anode is an open-cell foam carbon with a length of 10 cm, a width of 10 cm, and a thickness of 0.5 cm. A proton exchange membrane 4 is arranged between the cathode 1 and the anode 2, so that the protons generated by the anode migrate to the surface of the cathode through the proton exchange membrane. The cathode 1 and the anode 2 are connected to a resistor or electrical equipment 5 through a wire 3, the wire 3 is a copper wire; the res...

Embodiment 2

[0028] Housing 8 is provided with oily sludge 6 (thickness is 8cm) and hexavalent chromium-contaminated soil 7 (thickness is 8cm). It comes from the heaping site. The housing 8 has a diameter of 15 cm and a height of 25 cm, and is made of plastic material. The cathode 1 is placed on the upper part of the hexavalent chromium-contaminated soil, which is a graphite plate with a length of 5 cm, a width of 5 cm, and a thickness of 0.3 cm. The anode 2 is placed in the oil sludge at the bottom of the housing 8, 16 cm below the cathode, and the anode is an open-cell foam carbon with a length of 5 cm, a width of 5 cm, and a thickness of 0.3 cm. A proton exchange membrane 4 is arranged between the cathode 1 and the anode 2, so that the protons generated by the anode migrate to the surface of the cathode through the proton exchange membrane. The cathode 1 and the anode 2 are connected to the resistor or the electrical equipment 5 through the wire 3, and the wire 3 is a copper wire; the...

Embodiment 3

[0031] The housing 8 is provided with oily sludge 6 (20 cm in thickness) and hexavalent chromium-contaminated soil 7 (20 cm in thickness). It comes from the heaping site. The housing 8 has a diameter of 35cm and a height of 50cm, and is made of plastic material. The cathode 1 is placed on the upper part of the hexavalent chromium-contaminated soil, which is a graphite plate with a length of 25 cm, a width of 25 cm, and a thickness of 0.8 cm. The anode 2 is placed in the oil sludge at the bottom of the housing 8, 40 cm below the cathode, and the anode is an open-cell foam carbon with a length of 25 cm, a width of 25 cm, and a thickness of 0.8 cm. A proton exchange membrane 4 is arranged between the cathode 1 and the anode 2, so that the protons generated by the anode migrate to the surface of the cathode through the proton exchange membrane. The cathode 1 and the anode 2 are connected to the resistor or the electrical equipment 5 through the wire 3, and the wire 3 is a copper...

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Abstract

The invention discloses a deposition type microbial fuel cell for oil sludge treatment and synchronous reduction of soil hexavalent chromium, which comprises a shell, a cathode, an anode, a proton exchange membrane, a conductor and a resistor, wherein the cathode is a graphite plate and is placed on the upper part of soil contaminated with hexavalent chromium; the anode is an open cell foam carbonmaterial and is placed in the oil sludge at the lower part of the oil sludge. A proton exchange membrane is arranged between that cathode and the anode; the cathode and the anode are connected with resistors or electrical equipment through wires. The device does not need additional electric energy input, reduces hexavalent chromium in contaminated soil while degrading pollutants such as petroleumhydrocarbons in oil sludge, and microorganisms in anode can generate electric energy by utilizing organic substances in oil sludge. The invention is an economical and effective technology for degrading petroleum hydrocarbons in oil sludge, simultaneously reducing hexavalent chromium in soil and recovering electric energy.

Description

technical field [0001] The invention belongs to the technical field of industrial waste disposal, and in particular relates to a microbial fuel cell for synchronous reduction of hexavalent chromium in soil for oil sludge treatment. Background technique [0002] Microbial fuel cell (MFC) is an ideal device that uses microorganisms as an anode catalyst to directly convert chemical energy stored in organic matter into electrical energy. The technology is mild in operating conditions, safe and efficient, green, low in cost, simple in structure, and easy to manage. It has become a research hotspot in recent years. [0003] In the past few decades, researchers have developed a variety of materials as anode materials for MFCs, among which two-dimensional carbon-based materials such as graphite rods, carbon paper, graphite sheets, carbon cloth, graphite particles, and activated carbon are preliminary studies. the focus of their research. Non-carbon-based metal materials such as st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00B09C1/08
CPCB09C1/085C02F11/006
Inventor 吴卿付利娟肖京京彭森
Owner TIANJIN UNIV
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