Hunan Wastewater Treatment Plant, Majiahe Street, Zhuzhou, Hunan, China

The Hunan wastewater treatment plant is located in the Majiahe Street area of Tianyuan District, Zhuzhou City, Hunan Province, China. Serving a population of 310,000, it is classified as a large-scale municipal facility under China's wastewater management framework. The plant is situated in the Xiang River basin, a major tributary of the Yangtze River. As a large agglomeration, the plant 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 facilities of this scale. The regulatory framework also requires compliance with effluent limits for chemical oxygen demand, ammonia nitrogen, and total phosphorus to protect receiving waters. The plant discharges into the Xiang River, which flows northward through Hunan Province and eventually joins the Yangtze River at Dongting Lake. The Xiang River supports diverse aquatic life and provides drinking water for millions downstream. Effective treatment at this plant is critical to prevent eutrophication and maintain water quality in the Yangtze River basin.

The plant discharges into the Xiang River, a major tributary of the Yangtze River. The Xiang River flows through Hunan Province and empties into Dongting Lake, a large freshwater lake that regulates Yangtze flows and supports migratory birds and fish. The downstream Yangtze River ecosystem is ecologically sensitive, hosting species such as the Chinese sturgeon and finless porpoise. Nutrient loading from untreated or inadequately treated wastewater could contribute to algal blooms and habitat degradation in this important river-lake system.