Sludge MFC-anaerobic digestion coupling system and performance enhancing method thereof

Abstract

The invention discloses a sludge MFC-anaerobic digestion coupling system and a sludge MFC-anaerobic digestion coupling method. The system comprises a closed anaerobic anode chamber and an aerated cathode chamber, which are connected through a communicating pipeline; a proton exchange membrane is arranged in the communicating pipeline, a carbon felt anode in the anode chamber is connected with a carbon felt cathode in the cathode chamber through an alligator clip wire, an outer resistor is arranged between the anode and the cathode, and a circular hole is formed in the anode cover surface and connected with a gas collecting bag and used for collecting methane gas generated by anode anaerobic sludge fermentation. The invention further provides a method for strengthening the performance of the sludge MFC-anaerobic digestion coupling system, wherein waste iron scraps are added into anode anaerobic sludge of the sludge MFC-anaerobic digestion coupling system to obtain iron-containing sludge, and the iron-containing sludge serves as an anode substrate to domesticate electrogenesis bacteria and anaerobic digestion bacteria in the anode anaerobic sludge.

Description

technical field [0001] The invention discloses a sludge MFC-anaerobic digestion coupling system and a method for improving its performance, belonging to the technical field of new energy and environmental engineering. Background technique [0002] MFC (Microbial Fuel Cell) is a device that uses the catalysis of microorganisms to degrade organic matter in wastewater and directly convert the chemical energy of organic matter into electrical energy. Taking the common MFC as an example, in the anode chamber, microorganisms (especially those attached to the electrode surface) perform anaerobic oxidation and degradation of organic matter to produce H + , electronics and CO 2 The electrons in the microbial cells are transferred to certain extracellular proteins (such as C-type extracellular cytochrome) through a series of respiratory enzymes, and then transferred to the anode surface through different extracellular electron transfer methods; the electrons are transferred from the ...

AI Technical Summary

Problems solved by technology

In terms of anaerobic digestion, this method adds activated carbon with higher cost, and directly uses zero-valent iron. Compared with the present invention, the secondary use of energy is not achieved, and the energy consumption is relatively high.

[0008] In the current research field, an external carbon source is usually used as an MFC anode substrate to maintain the metabolic activities of microorganisms, but there are not many studies on using sludge directly as a carbon source for microbial growth.

In addition, there are few related reports on the "sludge MFC-anaerobic digestion coupling system". Comprehensive consideration of the relationship between "electricity production" and "anaerobic fermentation"

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