A Bidirectional Ion Transfer Microbial Fuel Cell

Abstract

The invention relates to a two-way ion migration microbial fuel cell, which comprises an anode chamber, a cathode chamber, a composite separation membrane, an external circuit for connecting an anode of the anode chamber and a cathode of the cathode chamber, an accessory for strengthening full utilization of OH<-> in anode reaction and the accessory for strengthening full utilization of H<+> in cathode reaction, wherein positive and negative ions of the two chambers are permitted to bidirectionally pass through the composite separation membrane simultaneously. According to the two-way ion migration microbial fuel cell, the positive and negative ions of the two chambers are permitted to bidirectionally pass through the composite separation membrane when solution separation of the two chambers, continuous feeding and discharging of MFC and continuous power generation are effectively achieved; the positive and negative ions share the power transmission task; the required ion migration rate is low, the resistance is small and the internal energy consumption is low under the same condition; H<+> and OH<-> can enter the cathode chamber and the anode chamber through the separation membrane from the anode chamber and the cathode chamber respectively, participate in cathode electrode reaction and anode electrode reaction respectively, and are effectively utilized; the phenomena that a few of salt materials and hydroxide materials are accumulated on the surface of the separation membrane and the separation membrane is blocked can be avoided; and the service time is long.

Description

technical field [0001] The invention belongs to the field of microbial electrochemistry, and in particular relates to a separation membrane, OH-rich - solution with rich H + The solution is refluxed to the corresponding feed port, OH - with H + A two-way ion transport microbial fuel cell with less loss. Background technique [0002] Microbial fuel cell (MFC) can not only reduce the pollution of organic wastewater, but also convert the chemical energy of organic matter in wastewater into electrical energy. It is one of the hot research directions in the field of environment and energy in this century. [0003] The dual-chamber MFC is mainly composed of three parts: the anode chamber, the cathode chamber and the separation membrane. exist anode In an anaerobic environment, organic matter is microorganism decomposes and releases electrons and proton , electrons rely on some electron transfer The mediators are efficiently transferred between the biocomponent and the a...

AI Technical Summary

Problems solved by technology

When negatively charged anions come from the other side of the separation membrane, some of the accumulated positively charged cations combine to make a certain amount of OH in the solution - Failure to reach the anode also has an adverse effect on the formation of an ideal alkaline environment for the anode required for power generation, resulting in a reduction in MFC production capacity

[0011] Therefore, whether it is a proton exchange membrane, a cation exchange membrane, or an anion exchange membrane, the use of a separation membrane that only allows a single electrical ion to pass through will have an adverse effect on the power density and Coulombic efficiency of the MFC.

Although there are a lot of researches on MFC and its development is also very fast, its power density and coulombic efficiency are still generally low at present, which has a lot to do with the common use of MFC separator membranes that only allow single-charged ions to pass through.

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