Anaerobic fermentation processing and clean energy obtaining method for kitchen organic waste

Abstract

The invention discloses an anaerobic fermentation processing and clean energy obtaining method for kitchen organic waste. Due to the fact that distribution of fermentation raw materials, strains and other factors are not uniform, methane gas pressure in a gas storage plate is not consistent with methane gas pressure in an auxiliary gas storage plate; when the methane gas pressure in the auxiliary gas storage plate is larger than the methane gas pressure in the gas storage plate, part of biogas slurry accumulated in the auxiliary gas storage plate is squeezed into an inner hydraulic pressure cylinder, the liquid level in the inner hydraulic pressure cylinder is raised, and the other part of the biogas slurry is squeezed into a fermentation cavity in the bottom of the gas storage plate; when the liquid level of the biogas slurry in the auxiliary gas storage plate is lower than the plane of the bottom of an inner vertical plate, the biogas storage quantity in the auxiliary gas storage plate reaches the maximum degree, biogas continuously collected in the auxiliary gas storage plate overflows through the bottom of the inner vertical plate and flows into the gas storage plate, and when the liquid level of the biogas slurry in the fermentation cavity reaches the horizontal plane of the bottom of a gas barrier plate at a material in-out opening, the biogas storage quantity of the system reaches the maximum degree, in other words, the biogas storage quantity is the sum of the biogas quantity accumulated in the gas storage plate and the biogas quantity accumulated in the auxiliary gas storage plate.

Description

technical field [0001] The invention relates to the field of new energy and fermentation, in particular to a microbial fermentation treatment system for fermentation of raw materials such as straw and animal manure. Background technique [0002] The air ducts of the existing biogas fermentation systems are mostly poured with concrete and fixed on the top of the gas storage plate, and the airtightness of the surrounding is not high, and the air leakage around the surrounding is difficult to block; since the fermentation raw materials of the biogas digester are mostly livestock manure, manure During the decay process, various insects are easy to breed, and maggots crawl into the airway tube and cause blockage, which is difficult to clean; when there is water in the airway tube, it is difficult to discharge; the most prominent problem is that when the airway tube breaks, it is difficult to replace and can Lead to the scrapping of the whole biogas fermentation system. [0003] ...

AI Technical Summary

Problems solved by technology

[0002] The air ducts of the existing biogas fermentation systems are mostly poured with concrete and fixed on the top of the gas storage plate, and the airtightness of the surrounding is not high, and the surrounding air leakage is difficult to block; since the fermentation raw materials of the biogas digester are mostly livestock manure, manure During the decay process, various insects are easy to breed. Maggots crawl into the airway tube and cause blockage, which is difficult to clean; when there is water in the airway tube, it is difficult to discharge; the most prominent problem is that when the airway tube breaks, it is difficult to replace and can Lead to the scrapping of the entire biogas fermentation system

[0003] The biogas storage space of the current hydraulic biogas fermentation system refers to the area between the gas baffles of the feed pipe and the gas baffles of the discharge pipe arranged at both ends of the fermentation chamber. When the stored biogas is not used for a long time, The stored biogas overflows from the bottom of the feed pipe air baffle, discharge pipe air baffle, and enters the air, causing waste; the existing biogas storage space is limited

[0004] The most important factors affecting biogas fermentation efficiency and gas production are fermentation raw materials, strains, and temperature. When the fermentation raw materials and strains are evenly distributed, microorganisms can fully decompose the fermentation raw materials, produce more biogas and make the temperature in the biogas storage chamber increase to further promote fermentation; in the existing biogas fermentation system, due to the poor fluidity of the biogas slurry, a large amount of fermentation raw materials are accumulated at the inlet. After long-term fermentation, the biogas slurry containing a large number of bacteria mainly accumulates at the outlet. As a result, the distribution of fermentation raw materials and strains in the fermentation system is uneven, which inhibits the fermentation efficiency and reduces the gas production.

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