A method and device for co-producing hydrogen and electricity from organic waste

Abstract

The invention provides a coproduction method and device of hydrogen and electricity by organic wastes. The method comprises the following steps: (1) strain preparation and raw material pretreatment; (2) hydrogen production by anaerobic fermentation; (3) electricity generation by microbial fuel cell; and (4) clear water recycle or discharge. The device comprises a feed device, an anaerobic hydrogen-producing reactor and a microbial fuel cell which are communicated sequentially, wherein the water outlet of the anaerobic hydrogen-producing reactor is communicated with the water inlet of an anode chamber of the microbial fuel cell. According to the method and the device, the energy recovery rate of organic waste can be improved, further treatment of the organic waste can be realized. The method and the device are suitable for treating various organic waste water and solid organic wastes, including but not limited to organic acid waste water, sugar making waste water, starch waste water, wine brewing waste water, food processing waste water and residues, kitchen wastes, fruit and vegetable wastes and crop straws. By the application of the method and device, environmental governance and clean renewable energy source development can be effectively combined.

Description

Technical field [0001] The invention belongs to the field of organic waste treatment and clean energy development, and specifically relates to a method and device for co-producing hydrogen and electricity from organic waste. technical background [0002] It is an indisputable fact that the excessive development and utilization of fossil fuels have caused global warming, acid rain, and the destruction and degradation of the ecological environment, and fossil fuels are also facing a situation of exhaustion. Therefore, based on environmental and energy considerations, humans urgently need a kind of pollution-free Of renewable energy. Hydrogen energy is an ideal clean and renewable alternative fuel. After it is burned, only water is produced and there are no other greenhouse gases. It can be directly and efficiently converted into electricity through fuel cells. Considering environmental issues, the use of various organic wastes (organic wastewater and solid organic waste) for biolo...

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Problems solved by technology

[0003] However, the biochemical mechanism determines that the energy recovery efficiency and organic matter utilization rate of anaerobic fermentation of organic waste are low, because the anaerobic fermentation of organic matter is accompanied by organic acid by-products such as acetic acid, propionic acid, butyric acid, and valeric acid. The above-mentioned by-products cannot be further converted into hydrogen under the same conditions, but are accumulated in organic wastewater. On the one hand, the energy stored in organic matter cannot be fully recovered, and the accumulation of organic acids will cause hydrogen production in anaerobic fermentation. Cause feedback inhibition. In addition, the presence of organic acids will cause secondary pollution, and the advanced treatment of organic waste cannot be realized.

[0004] Chinese patent 200910011663.2 discloses a method of using a biofuel cell reactor to produce hydrogen and generate electricity. Can either

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