Comprehensive utilization system for feces in large-scale breeding industry

Abstract

The invention discloses a comprehensive utilization system for feces in a large-scale breeding industry. The comprehensive utilization system comprises a feces collecting unit, a solid-liquid separating unit, an anaerobic fermentation unit, a biogas utilization system and a biogas slurry utilization system, wherein the feces collecting unit comprises a filter tank and a manure pit; the solid liquid separating unit comprises a solid-liquid separator, a buffer pool and an organic fertilizer treatment device; the anaerobic fermentation unit is a multi-grade anaerobic reaction device and comprises a first-degree anaerobic reaction tank and a second-degree anaerobic reaction tank; the biogas utilization system comprises a biogas cabinet, a biogas purification device and a biogas generation device; the biogas slurry utilization system comprises a biogas slurry storage pool, a farmland irrigation device and a forestry irrigation device; an annular sterilizing device is arranged at the periphery of each of the filter tank, the manure pit and the buffer pool; a plastic film layer is arranged above the filter tank, the manure pit and the buffer pool. Feces wastewater is fermented to produce biogas and biogas slurry, and the organic fertilizer is produced through solid-liquid separation, so that secondary pollution of waste gas is avoided, the feces wastewater is fully reutilized, and the comprehensive utilization rate is increased.

Description

Technical field: [0001] The invention relates to a manure utilization system, in particular to a large-scale aquaculture manure comprehensive utilization system. By adopting solid-liquid separation and anaerobic fermentation technology, the manure and sewage are firstly separated into dry manure and manure water, and the dry manure is passed through The treatment becomes organic fertilizer, and the manure is anaerobically fermented to produce biogas and biogas slurry. The biogas can be used to generate electricity, and the biogas slurry can be used to irrigate farmland and trees. Background technique: [0002] With the development of animal husbandry and the rapid increase of large-scale pig farms and pig breeding areas, the main problem brought about is the treatment of a large amount of fecal sewage and wastewater: due to the strong leaching of feces and urine, if not properly treated, It will enter the groundwater layer through surface runoff and infiltration, or accumula...

AI Technical Summary

Problems solved by technology

[0002] With the development of animal husbandry and the rapid increase of large-scale pig farms and pig breeding areas, the main problem brought about is the treatment of a large amount of fecal sewage and wastewater: due to the strong leaching of feces and urine, if not properly treated, It will enter the groundwater layer through surface runoff and infiltration, or accumulate in the soil, causing soil pollution

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