Hunan Wastewater Treatment Plant, Chenzhou City, Hunan Province

The Hunan wastewater treatment plant is located in Rucheng County, Chenzhou City, in the southern part of Hunan Province, China. It serves a population of approximately 56,100, classifying it as a medium-sized municipal facility. The plant is situated in a region characterized by hilly terrain and a subtropical monsoon climate, which influences water management practices. As a Chinese wastewater treatment facility, the plant operates under national standards including the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). For a plant serving this population size, secondary treatment with nutrient removal is typically required to meet Class 1-A or 1-B effluent standards, depending on the receiving water's sensitivity. Regulatory compliance is expected. The plant discharges treated wastewater into local rivers that ultimately flow into the Xiang River, a major tributary of the Yangtze River. The Xiang River basin supports diverse aquatic life and provides water for agriculture and industry downstream. Proper treatment at this plant helps protect water quality in the Xiang River and contributes to the ecological health of the Yangtze River system.

The plant's treated effluent enters local streams that drain into the Xiang River, which flows northward through Hunan Province before joining the Yangtze River at Dongting Lake. The Xiang River basin is an important ecological corridor supporting fish species and migratory birds. Downstream, Dongting Lake is a large freshwater lake that provides critical wetland habitat and flood regulation. Effective wastewater treatment at this plant helps reduce nutrient loading and protects water quality in this interconnected river-lake system.