Jiangsu Wastewater Treatment Plant, Qixia District, Nanjing

The Jiangsu wastewater treatment plant is located in Qixia District, Nanjing, Jiangsu Province, China. It serves a population equivalent of 205,000, classifying it as a medium-to-large agglomeration under Chinese wastewater management frameworks. The plant is situated in the Yangtze River Delta region, a densely populated and industrialized area. As a plant serving over 200,000 people, it is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which mandates secondary treatment with nutrient removal for plants of this scale. Typical facilities in this region employ activated sludge processes with biological nitrogen and phosphorus removal. The treated effluent is likely discharged into local waterways that eventually flow into the Yangtze River, one of China's most important water bodies. The Yangtze River supports diverse aquatic ecosystems and provides drinking water for millions. The plant plays a critical role in protecting the river from nutrient pollution and industrial contaminants common in the Nanjing area.

The plant discharges into tributaries of the Yangtze River, which flows eastward into the East China Sea. The Yangtze River basin is a major ecological corridor supporting numerous fish species, including the endangered Chinese sturgeon. Downstream waters are subject to eutrophication risks from agricultural and urban runoff, making effective nutrient removal at treatment plants essential for maintaining water quality in the river and coastal zone.