Shanxi Wastewater Treatment Plant, Pingcheng District, Datong, Shanxi, China

The Shanxi wastewater treatment plant is located in Pingcheng District, Datong, Shanxi Province, China, along Binhe Road. It serves an estimated population of 56,000, placing it in the medium-scale category for municipal wastewater treatment in China. The plant is situated inland, more than 50 km from the coast, and its operations are governed by China's national discharge standards for urban wastewater. Under China's regulatory framework, wastewater treatment plants serving populations above 50,000 are typically required to achieve secondary treatment or higher, in line with the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). This standard sets limits for key pollutants such as COD, BOD, and nutrients, with stricter requirements for plants discharging into sensitive water bodies. The regulatory context ensures a baseline level of treatment. The plant discharges treated effluent into the local water system, which ultimately drains into the Hai River basin and then to the Bohai Sea. The Hai River basin is a major water system in northern China, supporting agriculture, industry, and urban water supply. The downstream environment includes ecologically sensitive areas that rely on adequate treatment to prevent eutrophication and protect aquatic life.

The Shanxi plant discharges into the Hai River basin, which flows through northern China and empties into the Bohai Sea. The receiving waters support diverse aquatic ecosystems and are used for irrigation and industrial purposes downstream. Effective nutrient removal is critical to prevent algal blooms and maintain water quality in this semi-arid region, where water resources are already stressed.