“Properly handling pig farm waste can not only avoid environmental pollution, but also turn it into a resource for turning waste into treasure.†On February 2nd, Wang Shijun, an animal husbandry promotion technician at the Agricultural Comprehensive Service Station in Tang County, introduced the pig manure. There are two ways to use it: one is to directly use it as fertilizer or fish feed, and the other is to produce biogas through fermentation. Urine and sewage are purified to achieve compliance.
According to Wang Shijun, pig manure is an excellent organic fertilizer, but it should be composted before application. Natural composting or composting with fermentation towers and fermentation tanks can be used. Solid or liquid manure can be used to produce biogas, but biogas digesters need to be built. The biogas produced can be used for lighting, power generation, heating or fuel use. Biogas slurry and biogas residue can be used as fertilizer. The processes and methods of manure treatment mainly include solid-liquid separation, multi-stage precipitation, anaerobic fermentation, aerobic fermentation, and biodegradation.
The combination of planting and breeding to develop ecological agriculture is an effective way to fundamentally solve the pollution of pig farms and realize the sustainable development of the pig industry.
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