Livestock and poultry manure anaerobic fermentation device with biogas slurry reflux pipeline

Abstract

The invention relates to a livestock and poultry manure anaerobic fermentation device with a biogas slurry reflux pipeline, and relates to an anaerobic fermentation device and particularly relates to a livestock and poultry manure anaerobic fermentation device with the biogas slurry reflux pipeline, aiming at solving the problems that biogas slurry subjected to anaerobic fermentation can not be directly used, can be utilized after being blended into diluents with different concentrations according to different needs or being disinfected, can cause secondary pollution on underground water, atmosphere and nature after being used for a long time and is limited in usage season and usage object. The anaerobic fermentation tank is communicated with a solid-liquid separation machine through a digestive fluid pipeline; the solid-liquid separation machine is communicated with a biogas residue pipeline, and the solid-liquid separation machine is also communicated with a biogas slurry storage tank through a biogas slurry first pipeline; the biogas slurry storage tank is communicated with a biogas slurry second pipeline; and the biogas slurry second pipeline is communicated with a biogas slurry third pipeline, and the biogas slurry second pipeline is also communicated with a feed device by virtue of the biogas slurry reflux pipeline. The livestock and poultry manure anaerobic fermentation device disclosed by the invention is used for biogas preparation in agriculture and animal husbandry.

Description

technical field [0001] The invention relates to an anaerobic fermentation device, in particular to a livestock and poultry manure anaerobic fermentation device with a biogas slurry return pipeline. Background technique [0002] At present, anaerobic digestion is one of the most effective ways to treat livestock and poultry manure. The treatment of livestock and poultry manure through anaerobic digestion technology not only reduces the content of pollutants, but also produces a large number of secondary products-biogas, biogas slurry, biogas scum. Biogas can be used for power generation, combustion or CNG reuse through purification equipment, etc. Biogas residue can be made into organic fertilizer through aerobic fermentation and returned to farmland. However, biogas slurry is different. Biogas slurry contains organic wastes such as ammonia nitrogen at a high concentration, which cannot be directly used as fertilizer for on-site consumption. [0003] The main methods of usi...

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Problems solved by technology

[0004] The present invention solves the problem that the biogas slurry after anaerobic fermentation cannot be directly used, and needs to be blended into different concentrations of dilutions or used after disinfection according to different needs, and long-term use will cause secondary pollution to groundwater, the atmosphere and nature , the use season and the use object also have limitations, and then propose a livestock and poultry manure anaerobic fermentation device with biogas slurry return pipeline

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