| Summary: | Sonln Village is located in Songliao Plain and the upstream of Yitong River. The village takes non-professional scattered chicken-raising as the main source of incomes, and the annual raising number of the birds is about 3 million. Large-scale raising produces a large number of organic pollutants such as feces of livestock and poultry, so the pollution is concentrated and difficult to handle. A large number of feces are directly poured into the Yitong River, causing serious harm to the environment. In this study, Sonln Village is used to study the environmental pollution of livestock and poultry raising industry in Sonln Village. The study focuses on the composting of feces of livestock and poultry, the resource utilization of methane fermentation, and the resource utilization of the livestock wastewater, to purify the livestock wastewater, reduce the content of COD, nitrogen, phosphorus and other pollutants, meet the discharge standards and reduce the water pollution on the surface of the earth.
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