Beijing Wastewater Treatment Plant, Huairou District, Beijing, China

The Beijing wastewater treatment plant is located in Huairou District, Beijing, China, serving a population of approximately 150,000. The facility is part of the municipal wastewater infrastructure for the Huairou area, which includes the towns of Longshan and Miaocheng. As a medium-to-large agglomeration, the plant plays a key role in managing domestic wastewater from this suburban district of Beijing. Under China's national wastewater discharge standards (GB 18918-2002), treatment plants serving populations over 100,000 are typically required to achieve secondary treatment or higher, with nutrient removal in sensitive watersheds. The plant is expected to meet these national standards to protect local water quality. The plant's scale suggests it is a significant facility within Beijing's wastewater network. The treated effluent from the plant is discharged into local water bodies that ultimately flow into the Hai River system, which drains into the Bohai Sea. The Hai River basin is a major water system in northern China, supporting agriculture, industry, and ecosystems. The plant's operation helps reduce pollution loads to the river and downstream coastal environment, contributing to the ecological health of the Bohai Sea.

The plant discharges into local waterways within the Hai River basin, which flows into the Bohai Sea. The Hai River system is heavily influenced by urban and agricultural runoff, and the plant's treatment helps mitigate nutrient and pollutant loads. The Bohai Sea is a semi-enclosed sea with significant ecological importance, supporting fisheries and marine biodiversity. Effective wastewater treatment in this region is critical to reducing eutrophication and protecting coastal habitats.