A continuous flow anaerobic biocathode microbial fuel cell

Abstract

The invention relates to a continuous-flow anaerobic biological cathode microbial fuel cell, which is characterized in that a cathode chamber (16), an anode chamber (12) and a cation exchange membrane (14) are in sealed connection with a flange (6); the volume ratio of the cathode chamber (16) to the anode chamber (12) is (2-5):1; a water inlet (15), a backflow inlet (5), an intermediate water outlet (3), a water outlet (2) and a backflow outlet (17) are arranged in the cathode chamber (16); a detachable perforated clapboard (4), a cathode electrode (1) and a reference electrode (19) are arranged in the cathode chamber (16); the cathode electrode (1) and a load (21) are connected with a mud inlet (13) of the anode chamber (12) through an external conductor wire (20); an anode electrode (7) and a stirrer (10) are arranged in the anode chamber (12); a magnetic stirring device (9) is arranged on the lower part of the anode chamber (12); and a mud discharging hole (11) is also arranged in the anode chamber (12). The continuous-flow anaerobic biological cathode microbial fuel cell disclosed by the invention is capable of removing oxidative pollutants in water and organic matters in excess sludge simultaneously; electricity generation is carried out synchronously; and the continuous-flow anaerobic biological cathode microbial fuel cell is widely applied to continuous removal of oxidative pollutants in underground water, electroplating wastewater, rolling wastewater, beneficiation wastewater and the like.

Description

technical field [0001] The invention relates to a continuous flow anaerobic biocathode microbial fuel cell. Specifically, it is a continuous flow anaerobic biocathode microbial fuel cell for synchronously treating excess sludge and oxidative pollutants in water. It belongs to the field of environmental protection technology and new energy. Background technique [0002] The content of organic matter in urban sewage plant sludge is about 10 times that of urban sewage, accounting for more than 60% of the total, and easily degradable organic matter is also more than 40%, which is the main factor affecting the stability of sludge. Sludge is rich in organic matter, such as protein, polysaccharides and fats, and is a potential biofuel. Sludge treatment costs account for 25% to 60% of the total operating costs of sewage treatment plants. Sludge treatment has become a bottleneck problem restricting the development of sewage treatment. A microbial fuel cell (MFC) is an electrochemi...

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Problems solved by technology

[0005] However, existing microbial fuel cells still have many defects and are not suitable for continuous removal of oxidative pollutants in water.

First, due to the asymmetry of the number of electrons required to treat sludge and sewage, existing fuel cells need to treat sewage and sludge separately, and usually use potassium ferricyanide and glucose as cathode and anode fuels, which are costly and easy to process. cause secondary pollution

The second is that most of the existing fuel cells have a left and right chamber structure, which is not conducive to increasing the volume and increasing the daily processing capacity

Third, the hydraulic conditions of the traditional cube-shaped fuel cell are not suitable for continuous inflow of water, which is not conducive to the long-term stable power generation of the battery

Fourth, when the traditional fuel cell uses sludge as fuel, it is easy to cause sludge deposition, forming sludge self-digestion, and reducing the utilization efficiency of the battery

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