Four-in-one biogas fermentation device and method

Abstract

The invention relates to a four-in-one biogas fermentation device and method. The device comprises a first-stage dry fermentation mechanism, a second-stage wet fermentation mechanism, a folding gas storage bag, a sunlight greenhouse and a solar water heater, wherein the first-stage dry fermentation mechanism comprises an annular dry fermentation tank which is filled with a feed liquid and is arranged in the sunlight greenhouse, a net box which is filled with a material and is soaked in the feed liquid, and a water seal cover which is hermetically arranged at the top of the net box; the second-stage wet fermentation mechanism comprises a wet fermentation tank which is communicated with the dry fermentation tank, a heat exchanger which is arranged in the wet fermentation tank, and a biological membrane which is fixed in the wet fermentation tank; a gas guide pipe is arranged at the top part of the wet fermentation tank; the folding gas storage bag is arranged at the top part of the wet fermentation tank and is communicated with the gas guide pipe; and the solar water heater is arranged at the top part of the sunlight greenhouse and is used for supplying circulating hot water to the heat exchanger. By using the four-in-one biogas fermentation device and the method provided by the invention, the problem that a sludge pump is blocked easily is solved, and by combining the use of solar energy and the sunlight greenhouse, energy sources are saved, the degradation time of a fiber material is shortened, the utilization ratio of a fermentation raw material is improved, the content of methane in biogas is improved, and the comprehensive utilization ratio of biogas residues and biogas slurry is increased.

Description

technical field [0001] The invention relates to a biogas fermentation device and method, in particular to a biogas fermentation device and method that integrates solar energy collection, dry and wet two-step fermentation, and greenhouse hydroponics, and belongs to the technical field of biogas fermentation. Background technique [0002] With the rapid development of my country's new rural construction, the increasingly serious domestic waste pollution is worrying. Domestic waste and straw are piled up randomly, livestock manure can be seen everywhere, and domestic sewage flows underground. If these environmental pollution problems are not scientifically treated as soon as possible, they will be destroyed It will seriously affect the process of building a new socialist countryside. The commonly used method for treating organic waste is anaerobic fermentation, which can turn waste into treasure, that is, organic waste can be anaerobically fermented to generate biogas and biogas...

AI Technical Summary

Problems solved by technology

At present, the conventional anaerobic fermentation device generally adopts a fully mixed fermenter (CSTR). Oxygen fermentation, on the one hand, due to the low density of straw, it is often easy to float on the top of the fermentation tank, which may easily cause crusting on the top of the material or short circuit of the material, and easily lead to blockage of the sludge pump; The biogas fermentation process needs to go through the acidification stage first, and the suitable bacteria group in the acidification stage is facultative anaerobic bacteria, and the full-mixed biogas fermentation device is used to try to anaerobically ferment all materials, which leads to a decrease in the utilization rate of straw materials , resulting in a decrease in the volumetric gas production rate, increasing the construction cost of the device, and poor cost performance, which is not conducive to use and promotion

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