Microorganism electrochemical system capable of realizing electricity generation, hydrogen generation and sewage treatment simultaneously

Abstract

The invention provides a microorganism electrochemical system capable of realizing electricity generation, hydrogen generation and sewage treatment simultaneously, comprising an electrolyzer which is divided into an anode chamber and a cathode chamber by a bipolar membrane, wherein the anode chamber and the cathode chamber are internally provided with an anode and a cathode respectively; the anodes and the cathodes are connected with a resistor by guide lines; each anode is formed by electricity-generating microorganisms and an anode substrate; each cathode is made of an electrochemically inert metal titanium, platinum or carbon material; the anode chamber is internally provided with sewage containing organic pollutants; and the cathode chamber is internally provided with a strong acid solution. In the system, a diaphragm technology is adopted to separate pH gradients of the anode chamber and the cathode chamber; a hydrogen evolution potential of the cathode is improved, and the activity of the organisms in electricity-generating microorganism oxidized sewage of the anode is maintained at the same time; the hydrogen is generated at the cathode at the same time of treating the organisms in the sewage of the anode; and because the cathode potential is improved, and the reaction can be generated spontaneously to output the electricity externally.

Description

technical field [0001] The invention belongs to the field of environmental protection water treatment / applied chemistry / new energy, and specifically relates to a microbial electrochemical system capable of simultaneously realizing electricity production, hydrogen production and sewage treatment. Background technique [0002] Microbial fuel cell technology can convert the energy contained in organic matter in sewage into electrical energy and collect it. However, the current microbial fuel cell technology relies on the anode to generate electricity to treat sewage, while the cathode often reduces oxygen to water. The overall reaction is that organic matter is oxidized by oxygen to water and carbon dioxide. With the energy crisis and the increasing demand for clean energy, hydrogen has attracted people's attention as a clean energy substance with high calorific value. Its various preparation technologies such as solar photolysis of water, microbial fermentation, and supercriti...

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Problems solved by technology

However, the technology of extracting hydrogen energy from sewage is rarely reported. Since the potential of organic matter in sewage is oxidized at the anode shows a certain negative value, and the potential of hydrogen gas at the cathode is also negative under the same conditions, the reaction cannot occur spontaneously. Additional energy is required to extract hydrogen from organic matter in sewage

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