Dry anaerobic fermentation biogas manufacturing system and biogas manufacturing method for wet garbage

Abstract

The invention discloses a dry anaerobic fermentation biogas manufacturing system and biogas manufacturing method for wet garbage. The dry anaerobic fermentation biogas manufacturing system sequentially comprises a feeding device, an anaerobic generator, a first conveyor, a second conveyor, a spiral squeezer, a sewage treatment tank and a biogas storing cabinet from an upper stream to a down stream, wherein a first stirrer, a second stirrer and a cycling screw rod pump are arranged on the side wall of an anaerobic reactor; the first stirrer is used for stirring biogas residues at the bottom layer; the second stirrer is used for stirring upper-layer biogas fluid and lower-layer biogas residues; and the cycling screw rod pump is used for mixing the upper-layer biogas fluid and the lower-layerbiogas residues. According to the system, the first stirrer, the second stirrer and the cycling screw rod pump are arranged in the anaerobic reactor for stirring the upper-layer biogas fluid and thelower-layer biogas residues in the anaerobic generator, so that the purpose of comprehensively and uniformly mixing high temperature anaerobic zymocyte, heavy biogas residues and light biogas fluid can be realized.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a dry-type anaerobic fermentation biogas production system for wet garbage and a biogas production method. Background technique [0002] Cities in China, led by Shanghai, have implemented relevant measures for the mandatory classification of domestic waste since 2019. In the relevant provisions, the mixing of dry waste and wet waste is specifically prohibited, and corresponding penalties have been set. Among them, wet waste Mainly refers to degradable kitchen waste produced in daily life, and dry waste mainly refers to ordinary garbage produced in daily life that is difficult to degrade. Compared with dry garbage, wet garbage has the characteristics of high moisture content and easy degradation. [0003] Since wet waste contains a large amount of biomass energy, and its high water content provides strong conditions for the conversion of such waste to bioenergy, in order to ef...

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Problems solved by technology

[0004] In the dry fermentation process, high-temperature anaerobic fermentation bacteria are used for biological fermentation. During the fermentation process, the high-temperature anaerobic fermentation bacteria and wet garbage need to be mixed, but the solid content of wet garbage in the dry fermentation process is high, and the dry fermentation The amount of water added to the process is small, and the heavy biogas residue and light biogas slurry formed by wet waste are easily separated. It is difficult for the high-temperature anaerobic fermentation bacteria in the anaerobic generator to fully mix with the heavy biogas residue and light biogas slurry in all directions. , so that the degradation rate of wet garbage is slowed down, and the generation rate of biogas is reduced

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