Guizhou Wastewater Treatment Plant, Wuyang Town, Guizhou Province

The Guizhou wastewater treatment plant is located in Wuyang Town, Zhenyuan County, within the Qiandongnan Miao and Dong Autonomous Prefecture of Guizhou Province, China. It serves a population of approximately 18,300 residents, classifying it as a medium-sized agglomeration under Chinese municipal wastewater standards. As a plant in China, it operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits based on the receiving water body's sensitivity. For plants of this scale, secondary treatment with nutrient removal is typically required to protect downstream water quality. The plant's treated effluent is discharged into local waterways that eventually drain into the Yuan River system, a tributary of the Yangtze River basin. This watershed supports diverse aquatic life and provides water for agricultural and domestic use downstream. Proper treatment is critical to prevent eutrophication and maintain ecological balance in the region.

The plant discharges into the Yuan River system, part of the larger Yangtze River basin, which flows eastward to the East China Sea. The watershed supports a variety of freshwater species and is used for irrigation and drinking water downstream. Effective nutrient removal is essential to prevent algal blooms and protect the ecological health of this important river network.