Jiangsu Wastewater Treatment Plant, Qingjiangpu District, Huai'an, China

The Jiangsu wastewater treatment plant is located in Qingjiangpu District, Huai'an, within the Jiangsu Province of eastern China. It serves a population equivalent of 400,000, placing it in the large agglomeration category for Chinese municipal wastewater infrastructure. The plant is situated in the Huai'an Economic and Technological Development Zone, an area with significant industrial and urban activity. As a large-scale facility in China, the plant is expected to meet the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which mandates secondary treatment as a minimum, with tertiary treatment required for sensitive water bodies. The designed capacity is recorded as 1. Typical large plants in China have capacities in the range of 100,000 to 500,000 m³/day. The plant discharges treated effluent into local waterways that ultimately drain into the Huai River basin, a major river system in eastern China. The Huai River flows eastward into the Yellow Sea via the Hongze Lake and the Yangtze River system. The plant's operations are critical for protecting the water quality of the Huai River basin, which supports agriculture, industry, and aquatic ecosystems in a densely populated region.

The plant's treated effluent enters the local drainage network within the Huai River basin, which flows through Hongze Lake before reaching the Yellow Sea. The Huai River basin is ecologically significant, supporting diverse aquatic life and providing water for irrigation and industry. Downstream areas include wetlands and floodplains that are important for migratory birds and fish spawning. The plant's discharge must comply with China's national standards to prevent eutrophication and protect downstream water quality.