Pollution abatement method for livestock and poultry farm

Abstract

The invention discloses a pollution abatement method for a livestock and poultry farm. The method comprises the following steps of: separating feces from fence washing water and rain water at the source; carrying out solid-liquid separation on the feces and the sludge generated in each treatment procedure; conveying the separated liquid part to a plug flow anaerobic fermentation reactor or a liquid high-temperature aerobic fermentation reactor for liquid biological treatment, carrying out aerobic fermentation and filtration to get a liquid organic fertilizer; and conveying the separated solid part to a high temperature aerobic fermentation device, after fermentation, aging and deeply processing the solid part to get a solid organic fertilizer. Bad smell is exhausted after being processed in a biological deodorization filtering tower, and the filter material replaced from the biological deodorization filtering tower is considered as carbon source and conveyed to the solid aerobic fermentation device so as to be treated. Firstly, the fence washing water is treated by a grid impurity removal facility, after being treated by an SBR (Sequencing Batch Reactor Activated Sludge Process) biological reactor and medicated for flocculation and sedimentation, the fence washing water is drained after being purified by a wet land, or drained after being treated by aerobic fermentation reaction and filtering, and the sedimentary sludge and the solid substances under the grid fence are conveyed into a solid-liquid separation procedure so as to be treated. The method can be used for managing or beneficially using all the pollutants, and contributing the effort for establishing the resource-saving and environmentally-friendly society.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a zero-emission, zero-pollution, and resource-based treatment method for large-scale livestock and poultry farms, and is widely used in pollution treatment of large-scale livestock and poultry farms. Background technique [0002] In 2009, China’s livestock manure emissions were 3.264 billion tons, 1.6 times the total industrial solid waste emissions in the same period, of which BOD and COD content were 72.7395 million tons and 80,399,600 tons, respectively. COD emissions have far exceeded industrial wastewater and The total COD discharge of domestic wastewater is 12.7754 million tons. There are more than 200 harmful gases in livestock and poultry manure. Among them, ammonia, hydrogen sulfide, methyl mercaptan, dimethyl disulfide, methyl sulfide, dimethylamine, lower fatty acids and other toxic and harmful malodorous gases are seriously polluted. The air ca...

AI Technical Summary

Problems solved by technology

[0006] 2. Stirring in the medium temperature anaerobic fermentation reactor (CSTR) and maintaining the medium temperature of 35°C in winter require high energy consumption

[0007] 3. The anaerobic fermentation reactor (CSTR) has a fermentation time of 20-25 days at a medium temperature of 35°C, and manure is produced every day, so it requires a lot of supporting equipment and the volume of the equipment is large, so it occupies an area very huge

[0008] 4. The concentration of biogas slurry is low (8%~12%), the processing capacity of solid-liquid separation is large, and the energy consumption is high

[0009] 5. The biogas slurry is used for agriculture, and the storage time is not less than 90 days. It needs a larger site and container to undertake it. The concentration of the biogas slurry is low, and it needs to be concentrated before it can be sold commercially, and the concentration requires a large investment

[0010] Therefore, the existing large-scale livestock and poultry farm pollution control technology has problems such as huge investment, high energy consumption, and low efficiency.

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