Overview
Yunnan wastewater treatment plant serves Weixin County, Zhaotong, Yunnan, China, with a population of 74,800. The facility operates under China's national wastewater standards for medium-sized agglomerations.
The Yunnan wastewater treatment plant is located in Weixin County, Zhaotong City, Yunnan Province, China. It serves a population of approximately 74,800, classifying it as a medium-sized agglomeration under Chinese wastewater management frameworks. The plant is situated inland, away from coastal areas, and its operations are part of the broader municipal infrastructure for the region. As a facility serving a population of this scale, the plant is expected to meet secondary treatment standards as mandated by China's national wastewater discharge regulations (GB 18918-2002). These standards require effective removal of organic pollutants and nutrients to protect receiving water bodies. Typical configurations for similar-sized plants in Yunnan include activated sludge systems or biological nutrient removal. The plant discharges treated wastewater into local watercourses that ultimately drain into the Yangtze River basin. The receiving environment supports diverse aquatic life and is important for regional water resources. Proper treatment helps maintain water quality in downstream ecosystems, including agricultural and urban water uses.
Environmental context
The plant's treated effluent flows into tributaries of the Yangtze River, which is the longest river in Asia and a critical water source for millions. The watershed supports diverse aquatic ecosystems, including fish species and migratory birds. Downstream areas include the Three Gorges Reservoir region, where water quality is closely monitored. The plant's operations contribute to protecting these waters from nutrient pollution and pathogens.
Frequently asked questions
The plant is located in Weixin County, Zhaotong City, Yunnan Province, China.
The plant serves approximately 74,800 people, classifying it as a medium-sized agglomeration.
The plant discharges into local tributaries that flow into the Yangtze River, helping protect downstream water quality in the Yangtze basin.
The plant must comply with China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets limits for COD, BOD, nitrogen, phosphorus, and other pollutants.
For medium-sized agglomerations in China, typical treatment includes secondary biological processes such as activated sludge or oxidation ditches, often with nutrient removal to meet Class 1A or 1B standards.
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