Hunan Wastewater Treatment Plant, Lusong District, Zhuzhou | China

Hunan wastewater treatment plant is located in Lusong District, Zhuzhou, within Hunan Province, China. It serves a population of approximately 64,000, placing it in the medium agglomeration category for Chinese municipal wastewater infrastructure. As a Chinese municipal plant, it is subject to the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for conventional pollutants and nutrients. Plants of this scale typically employ biological treatment processes such as activated sludge or oxidation ditch to meet Class 1A or 1B standards, depending on the receiving water body's sensitivity. The plant discharges into the Xiang River basin, which flows through Hunan into Dongting Lake and ultimately into the Yangtze River. The Xiang River supports diverse aquatic life and provides drinking water for downstream communities. Effective treatment at this plant helps protect water quality in this ecologically important watershed.

The plant's treated effluent enters the Xiang River system, a major tributary of the Yangtze River. The Xiang River flows through Hunan Province into Dongting Lake, a large freshwater lake that regulates floodwaters and supports migratory birds and fish. Downstream, the waters join the Yangtze River, which sustains extensive aquatic ecosystems and provides water for millions of people. Protecting water quality in this basin is critical for regional ecological health and human use.