Overview
Hunan wastewater treatment plant serves Changde City in Linli County, Hunan Province, China, with a population equivalent of 88,500. It operates under China's national wastewater discharge standards.
The Hunan wastewater treatment plant is located in Linli County, Changde City, Hunan Province, China. It serves a population equivalent of 88,500, placing it in the medium-to-large agglomeration category for Chinese municipal wastewater infrastructure. The plant is situated inland, approximately 50 kilometers from the coast, and discharges into local water bodies that ultimately flow into the Dongting Lake system. As a Chinese municipal wastewater facility, the plant is subject to the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for chemical oxygen demand, biochemical oxygen demand, suspended solids, ammonia nitrogen, and total phosphorus. For plants serving populations over 50,000, the standard typically requires secondary treatment with nutrient removal, especially in sensitive watersheds like the Dongting Lake basin. The treated effluent from the plant enters local rivers and streams that drain into the Dongting Lake, the second-largest freshwater lake in China and a critical ecological resource. The lake supports diverse aquatic life, including migratory fish species, and serves as a major water source for agriculture and drinking water in the region. Proper treatment at this plant helps protect the lake's water quality and downstream ecosystems.
Environmental context
The plant discharges into local waterways that flow into the Dongting Lake basin, a large freshwater lake system in Hunan Province. The lake is ecologically sensitive, supporting diverse aquatic life and serving as a key stopover for migratory birds along the East Asian-Australasian Flyway. Downstream, the lake connects to the Yangtze River, one of the world's major river systems. The plant's operations help mitigate nutrient and pollutant loads that could otherwise contribute to eutrophication and habitat degradation in this important watershed.
Frequently asked questions
The plant is located in Linli County, Changde City, Hunan Province, China. It serves the local municipal area with a population equivalent of 88,500.
The plant serves a population equivalent of 88,500, classifying it as a medium-to-large agglomeration under Chinese wastewater management standards.
The treated effluent is discharged into local rivers and streams that flow into the Dongting Lake basin, eventually reaching the Yangtze River. The plant must meet China's GB 18918-2002 discharge standards.
The plant operates under China's national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for key pollutants. For plants serving over 50,000 people, secondary treatment with nutrient removal is typically required.
For Chinese municipal plants serving populations around 88,500, standard practice includes secondary biological treatment (such as activated sludge) followed by disinfection. In sensitive watersheds like the Dongting Lake basin, additional nutrient removal for nitrogen and phosphorus is often implemented to protect water quality.
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