Efficient anaerobic fermentation process using agricultural comprehensive waste as raw material

Abstract

The invention discloses an efficient anaerobic fermentation process using agricultural comprehensive waste as a raw material, belongs to the technical field of biogas fermentation devices and aims tosolve the problem that a large amount of low-temperature liquid dung in an existing biogas fermentation process enters a fermentation tank to destroy fermentation balance. The efficient anaerobic fermentation process comprises the steps that S1, pretreatment is performed, wherein agricultural comprehensive waste firstly passes through a grating tank, natural sediment is performed to remove silt inexcrement, and meanwhile suspended matter is removed artificially; S2, attenuation and degradation are performed, wherein biogas slurry reflux is conducted on the agricultural comprehensive waste treated in the step S1, and clear water is appropriately supplemented according to the amount of the biogas slurry after a period of time; S3, feeding is performed, the agricultural comprehensive waste is preheated to keep the temperature of the solution in the range of 35+ / -2 DEG C, wherein a flexible feeding mode is adopted in the step S31.

Description

technical field [0001] The invention relates to the technical field of biogas devices, and more specifically relates to a high-efficiency anaerobic fermentation process using agricultural comprehensive waste as raw material. Background technique [0002] The biogas project is that organic matter such as breeding manure, straw, and kitchen waste is fermented in an anaerobic fermentation tank at a medium temperature (35±2°C), and uses the metabolism of anaerobic microorganisms to remove most of the organic matter and produce a large amount of biogas (mainly composed of 50%-80% methane), biogas residue, biogas slurry. The cultivation of microbial flora, especially keeping it in the best fermentation state is a long process. Once this state is destroyed, it is very difficult and takes a long time to recover. Anaerobic fermentation refers to the stabilization of waste through the metabolic activities of microorganisms under anaerobic conditions, accompanied by changes in the pro...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency anaerobic fermentation process using agricultural comprehensive waste as raw material in order to solve the problem that a large amount of low-temperature manure enters the fermentation tank and destroys the fermentation balance in the existing biogas fermentation process.

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