Guangdong Wastewater Treatment Plant, Nanhai District, Foshan, China

The Guangdong wastewater treatment plant is located in Baixi Village, Xiqiao Town, Nanhai District, Foshan City, Guangdong Province, China. It serves a population of approximately 120,000, classifying it as a medium-to-large agglomeration under Chinese municipal wastewater management. As a plant in China, it must comply with the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for COD, BOD, SS, ammonia nitrogen, and total phosphorus. For agglomerations of this scale, secondary treatment with nutrient removal is typically required, especially in sensitive water bodies. The plant discharges treated effluent into local waterways that eventually flow into the Pearl River Delta, a densely populated and economically vital region. The Pearl River estuary supports diverse aquatic life and is an important ecological and fisheries zone. Proper treatment helps protect downstream water quality and the coastal environment of the South China Sea.

The plant's treated effluent enters the local drainage network within the Pearl River Delta, which flows into the Pearl River Estuary and then the South China Sea. The delta is a highly productive ecosystem supporting fisheries and migratory birds. Nutrient loading from urban runoff and wastewater can contribute to eutrophication in coastal waters, making effective treatment critical for maintaining ecological balance.