Overview
Yunnan wastewater treatment plant serves Zhaoyang District, Zhaotong, Yunnan, China, with a population of 468,800. It operates under China's national wastewater standards for large agglomerations.
Yunnan wastewater treatment plant is located in Zhaoyang District, Zhaotong City, Yunnan Province, China. It serves a population of approximately 468,800, classifying it as a large-scale municipal facility within the region's urban wastewater infrastructure. The plant is situated in the southwestern part of China, an area characterized by mountainous terrain and a subtropical climate. As a large agglomeration serving nearly half a million people, the plant is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002). This national regulation sets stringent limits on pollutants such as COD, BOD, ammonia nitrogen, and total phosphorus, with requirements that typically include secondary biological treatment and, in sensitive watersheds, advanced nutrient removal. Its scale implies robust infrastructure to handle high-volume flows. The treated effluent from the plant is discharged into local water bodies that ultimately drain into the Yangtze River basin, one of China's most ecologically and economically significant river systems. The downstream environment supports diverse aquatic life and provides water for agriculture, industry, and drinking water for millions. Proper treatment at this plant is critical to preventing eutrophication and protecting water quality in the broader Yangtze watershed.
Environmental context
The plant discharges into local waterways that are part of the upper Yangtze River basin, which flows through Yunnan and eventually into the East China Sea. This region is ecologically sensitive, supporting diverse freshwater species and providing critical water resources for downstream communities. The subtropical climate and mountainous terrain make the watershed vulnerable to erosion and nutrient runoff, emphasizing the need for effective wastewater treatment to maintain water quality and aquatic habitat.
Frequently asked questions
The plant is located at Yingbin Avenue, Fenghuang Subdistrict, Zhaoyang District, Zhaotong City, Yunnan Province, China.
The plant serves a population of approximately 468,800, making it a large municipal wastewater treatment facility.
The plant treats wastewater that would otherwise enter local waterways within the upper Yangtze River basin, helping to protect the Yangtze River and its downstream ecosystems.
The plant operates under China's national standard GB 18918-2002, which sets discharge limits for pollutants. Large plants like this are typically required to achieve secondary treatment with nutrient removal to protect sensitive water bodies.
For large agglomerations in China, standard treatment includes secondary biological processes such as activated sludge, often with advanced nutrient removal (nitrogen and phosphorus) to meet stringent discharge standards, especially in basins like the Yangtze.
Nearby plants