Microbial fuel cell system

Abstract

The invention relates to a microbial fuel cell system, and belongs to the technical field of pollutant degradation and energy regeneration. According to the microbial fuel cell system, an ultrasonic wave and microalgae integrated system is adopted, at the same time, the wastewater treatment is achieved, the membrane pollution is reduced, and the operation stability of the system is enhanced; the problem of anode acidification in a conventional microbial fuel cell is effectively solved by adopting the alkali modified anion exchange resin, the buffer performance of the system is improved, the influence of anode acidification on system operation is avoided, and a buffer agent does not need to be added additionally; a microalgae negative electrode is adopted and a biochar / iron-based catalyst layer is arranged, so that the rate of oxygen reduction reaction can be increased, and the power generation efficiency of the system is improved; an intermittent illumination mode is adopted, so that the growth of microalgae is facilitated, and the energy consumption is reduced. The microbial fuel cell system provided by the invention is efficient and stable, and can realize the synchronous treatment of landfill leachate, energy recovery and membrane regeneration.

Description

technical field [0001] The invention relates to a microbial fuel cell system, which belongs to the technical field of pollutant degradation and energy regeneration. Background technique [0002] As a new technology that can realize pollutant degradation and energy regeneration simultaneously, microbial fuel cell (MFC) has a very good application prospect in wastewater treatment such as landfill leachate treatment. At present, microbial fuel cell systems are mainly divided into two types: single-chamber and double-chamber. The dual-chamber MFC is mainly composed of an anode chamber and a cathode chamber loaded with electrogenic bacteria and a proton exchange membrane used to separate the cathode chamber and the anode chamber. Dual-chamber microbial fuel cells, single-chamber MFC mainly uses a single anode chamber, the side of the cathode electrode near the anode electrode is provided with a catalytic layer, and the other side is exposed to the air, and the oxygen in it is use...

AI Technical Summary

Problems solved by technology

[0004] The existing technical solutions mainly have the following disadvantages: (1) The oxygen reduction overpotential produced by microalgae is relatively high, and the reaction rate can be reduced without increasing the catalyst. Slower, resulting in lower power generation efficiency of the system; (2) As the system runs longer, the membrane fouling problem intensifies, resulting in a decline in the wastewater purification performance of the system, and additional membrane cleaning or replacement is required; (3) The cathode, The operation mode of the anode is repeatedly exchanged, but in this mode, after the exchange, the pH adjustment time is long, and after the cathode electrode is replaced with the anode electrode, some residual oxygen will reduce the effect of the anode electrode and make the wastewater purification performance of the system and power generation efficiency is not stable

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