Biogas production method

Abstract

The invention provides a biogas production method. The method comprises the following steps of: feeding materials, and pre-treating the materials; adding water or biogas slurry into an anaerobic pond where the materials are piled, sealing the anaerobic pond for fermentation, refluxing the biogas slurry or adding water every other 1 to 10 days, periodically stirring the material so as to prevent large-scaled incrustation of the materials, and simultaneously collecting biogas; and after the reaction of the materials in the anaerobic pond is ended, discharging the materials. In the method, the organic materials, of which the total solid content and the suspended matter content are high, can be used as raw materials, the incrustation of the materials is prevented in a process of producing the biogas, and the yield of the biogas produced by degradation and conversion of the materials is high.

Description

【Technical field】 [0001] The invention relates to the technical field of biological fermentation, in particular to a biogas production method using organic materials with high total solids and suspended matter content such as straw, animal manure or other biological waste as raw materials. 【Background technique】 [0002] In the prior art, the method of using organic materials with high content of total solids and suspended solids as raw materials to produce biogas generally requires strict pretreatment, chopping or pulverizing the materials, and then performing anaerobic fermentation in the fermentation device to produce biogas . [0003] The fermentation device used for biogas production in the prior art is mainly an anaerobic pond. The anaerobic pond includes a pond body with a pond cover above the pond body, a sewage pipe, a mud discharge pipe and an outlet pipe for biogas collection on the pond body. The pollutants enter the tank through the sewage pipe, and the biochem...

AI Technical Summary

Problems solved by technology

[0006] 1. The fermentation degradation rate and utilization rate of materials are low, and the gas production rate is low

[0007] 2. The processing of material chopping or crushing requires corresponding mechanical equipment and a certain amount of labor, resulting in high investment and operating costs

If the material is not chopped or crushed, it will cause difficulty in feeding the anaerobic tank, and what is more serious is that the pipeline will be blocked during operation, resulting in system failure

[0008] 3. The production and supply of biogas are discontinuous and unstable, which affects the further purification and storage of biogas in the subsequent steps, making it impossible for large-scale production and rational utilization of biogas

High investment and high operating costs also hinder the use of materials with high total solids and suspended solids as raw materials to produce biogas, and the application in industrial and agricultural production and life is also greatly limited

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