Microbial photoelectrochemical system for simultaneously generating electricity and hydrogen and treating sewage

Abstract

The invention relates to a microbial photoelectrochemical system for simultaneously generating electricity and hydrogen and treating sewage, which comprises an electrolytic bath and an ion exchange membrane, wherein the ion exchange membrane is arranged in the electrolytic bath and divides the electrolytic bath into an anode chamber and a cathode chamber; an anode and a photocathode are respectively arranged in the anode chamber and the cathode chamber; the anode and the photocathode are connected with a resistor through wires; one side of the photocathode is provided with a completely transparent quartz glass window; the anode is composed of electrogenesis microbes and an anode substrate; the photocathode is made of a sunlight-responsive semiconductor material; sewage containing organic pollutants is contained in the anode chamber; and an electrolyte solution is contained in the cathode chamber. In one microbial photoelectrochemical pool, the organic pollutants in the sewage are oxidized into carbon dioxide by electrogenesis microbes attached to the anode, and release electrons and protons, the protons are transferred to the cathode through the electrolyte so as to be reduced into hydrogen by the photocathode, and the electrons are transferred to the cathode through an external circuit so as to generate electric energy.

Description

technical field [0001] The invention belongs to the fields of environmental protection water treatment, applied chemistry and new energy, and specifically relates to a microbial photoelectrochemical system for simultaneously generating electricity, hydrogen 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 supercritical biomass gasif...

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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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