A system and method for ecological treatment of livestock and poultry manure liquid

Abstract

A manure and sewage liquid ecological treatment system for a livestock and poultry farm, comprising a source separation-supporting water-saving enclosure (101), a pollution control factory (102), a feed factory (103), and a supporting planting land (107). The pollution control factory (102) comprises the source separation-supporting water-saving enclosure (101), a high-temperature aerobic solid fermentation system, a medium-temperature anaerobic liquid fermentation system (104), a heating and heat balancing system (105), and a measurement and control system (106). A regulation pool (201) is connected to a feed port of the medium-temperature anaerobic liquid fermentation system (104) via a feed pump, biogas generated by the medium-temperature anaerobic liquid fermentation system (104) is transferred to the heating and heat balancing system (105), and the heating and heat balancing system (105) is connected to a heating coil (304) of the medium-temperature anaerobic liquid fermentation system (104) through a pipeline. The system uses a liquid organic-inorganic compound fertilizer (404) and a liquid microbial fertilizer (405) produced by the pollution control factory (102) for watering and drip irrigation of crops grown on the supporting planting land, and forage grass is used as a feed raw material for the feed factory, reducing cost for breeding, improving a nutritional level of feed, and promoting the harmonious development of farming and the environment.

Description

technical field [0001] The invention belongs to the field of environmental protection technology, and in particular relates to a system and method for ecological treatment of excrement liquid in livestock and poultry farms. Background technique [0002] In recent years, the aquaculture industry has developed rapidly towards intensification and scale. While providing the market with rich and high-quality livestock and poultry products, it also brings a large amount of pollutants such as feces and urine. cause serious pollution. [0003] Traditional biogas digesters are generally monolithic structures built with reinforced concrete structures, which are costly and difficult to construct, and there are the following problems in the process of use: (1) Digestive residues are difficult to clean and block the biogas digesters, affecting the normal use of the biogas digesters; (2) ) liquid surface "crusting", which affects the normal gas production of the biogas digester, and also...

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Problems solved by technology

[0003] Traditional biogas digesters are generally monolithic structures built with reinforced concrete structures, which are costly and difficult to construct, and there are the following problems in the process of use: (1) Digestive residues are difficult to clean and block the biogas digesters, affecting the normal use of the biogas digesters; (2) ) liquid surface "crusting", which affects the normal gas production of the biogas digester and also creates potential safety hazards

[0004] CN101045901 discloses a conjoined biogas digester, the purpose of which is to treat sewage, and to leave as much sludge as possible in the biogas digester, which will cause blockage of the fermentation tank due to long-term accumulation, and the purpose of the conjoined biogas digester is to expand the volume; CN104328035 discloses a The biogas digester system mainly produces biogas fertilizer, and the soft biogas digesters are connected by sludge pumps, which requires high energy consumption and large investment in equipment

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