Hunan Wastewater Treatment Plant, Yueyanglou District, Yueyang

The Hunan wastewater treatment plant is located in the Yueyanglou District of Yueyang City, Hunan Province, China, serving a population of approximately 500,000. The plant is situated in the Dongting Lake area, a major freshwater lake connected to the Yangtze River, and plays a critical role in managing municipal wastewater from the urban and tourist areas of Yueyang. As a large-scale facility serving over 150,000 people, the plant is expected to meet China's national discharge standards under the Environmental Protection Law and the Water Pollution Prevention and Control Action Plan. For agglomerations of this size, secondary treatment with nutrient removal is typically required to protect sensitive water bodies like Dongting Lake. The plant's operational context aligns with China's stringent regulations for wastewater treatment in the Yangtze River basin. The treated effluent from the plant is discharged into the Dongting Lake system, which flows into the Yangtze River and ultimately the East China Sea. Dongting Lake is an ecologically significant water body that supports diverse aquatic life, including migratory fish species, and provides critical flood storage for the Yangtze basin. The plant's performance directly affects the water quality of this important lake and downstream ecosystems.

The plant discharges into the Dongting Lake watershed, which connects to the Yangtze River and then the East China Sea. Dongting Lake is a vital freshwater ecosystem that supports diverse aquatic life, including fish spawning grounds and migratory birds. The lake also plays a key role in flood regulation and water supply for the region. Protecting this watershed from nutrient pollution and contaminants is essential for maintaining ecological balance and downstream water quality.