Single-chamber and film-free anaerobic type microbial fuel cell for processing acidic mine wastewater

A technology for mine wastewater and fuel cells, which is applied in the fields of biochemical fuel cells, mining wastewater treatment, biological water/sewage treatment, etc., can solve the problems of poor effect, secondary pollution by alkali method, and the technology needs to be improved.

Inactive Publication Date: 2014-05-28
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology

However, there is secondary pollution in the alkaline method, and the artificial wetland method requires a large area of ​​wetland; in the biochemical treatment method, the optimal pH of sulfate-reducing bacteria is 7, and sulfate-reducing bacteria have poor tolerance to heavy metal ions. At present, alkali is mainly used to adjust pH in biochemical water method, the effect is poor, and the waste residue is easy to cause secondary pollution
The technology of treating acid mine wastewater needs to be perfected

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  • Single-chamber and film-free anaerobic type microbial fuel cell for processing acidic mine wastewater

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Embodiment Construction

[0014] The single-chamber microbial fuel cell uses a ball-shaped stainless steel wire 4 as the anode, and a carbon sheet 3 as the cathode. The distance between the two poles is 3-5mm. The battery system is composed of a plexiglass plate with a volume of 10*10*10cm. The top plexiglass plate is provided with openings. Add 100mL of activated sludge 1 from a municipal sewage treatment plant, and add 900mL of acid mine wastewater containing sulfate-reducing bacteria 3 , The sludge is in direct contact with the acid mine wastewater and is naturally layered and partitioned. The anode is inserted into the sludge layer to form an anode area, and the cathode is inserted into the acid mine wastewater layer to form a cathode area. The anode and the cathode are led out by wires respectively, and an external resistor is connected to form an electric circuit. After filling with nitrogen, use sealing plug 5 to seal the opening tightly to maintain anaerobic operation. Inoculate sulfate-reduci...

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Abstract

The invention relates to a single-chamber and film-free anaerobic type microbial fuel cell for processing acidic mine wastewater, which comprises a cathode and an anode, wherein sludge is used as substrates of an anode region, the acidic mine wastewater containing sulfate reducing bacteria is used as catholyte, a volume ratio of the sludge to the acidic mine wastewater is 1:9; the sludge and the acidic mine wastewater are directly contacted and are layered and divided naturally; an anode region is formed by inserting the anode into the sludge layer, and a cathode region is formed by inserting the cathode into the acidic mine wastewater layer; the anode and the cathode are led out through wires respectively, and a resistance is externally connected, so that an electric circuit is formed. The microbial fuel cell not only can accelerate the increment of the pH value of the acidic mine wastewater, reduce concentration of sulfate ions and heave metal ions, consume excess sludge, but also is low in the cost of the film-free anaerobic structure, and can generate a certain electrical energy.

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells, in particular to a single-chamber membraneless anaerobic microbial fuel cell for treating acid mine wastewater. Background technique [0002] Acid Mine Drainage (AMD) pollution is a worldwide problem. AMD contains high concentrations of sulfate and soluble heavy metal ions, and has low pH and high acidity. Therefore, once discharged, it will have a serious impact on the river and its organisms, and even pollute the groundwater body. Once pollution occurs, it will be difficult to control. [0003] At present, the main methods for treating acid mine wastewater at home and abroad include continuous alkali production system (SAPS), artificial wetland method, biochemical treatment of sulfate reducing bacteria and permeable reaction wall method (PRB) for in-situ treatment. However, there is secondary pollution in the alkaline method, and the artificial wetland method requires a large are...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16C02F3/34C02F103/10
CPCC02F3/34C02F2103/10H01M8/16Y02E60/50
Inventor 蔡昌凤罗亚楠卜文辰徐建平
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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