Liaoning Wastewater Treatment Plant, Yingkou, Liaoning, China

The Liaoning wastewater treatment plant is located in the Yingkou High-tech Industrial Development Zone, Xishi District, Yingkou City, Liaoning Province, China. It serves a population equivalent of 330,000, classifying it as a large agglomeration under Chinese regulations. The plant's designed capacity is 1. As a facility in China, the plant operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits based on receiving water sensitivity. For large agglomerations like this, advanced treatment (Class 1A) is typically required if discharging into sensitive water bodies. The plant's location in an industrial development zone suggests it may handle both domestic and industrial wastewater. The plant is situated within 50 km of the coast, indicating its treated effluent likely discharges into a river system that flows into the Bohai Sea. The plant plays a role in protecting the coastal environment of the Liaodong Bay. Proper treatment is critical to prevent eutrophication and maintain water quality in this ecologically important marine area.

The plant's effluent likely enters a river system draining into the Bohai Sea, a semi-enclosed marginal sea of the Pacific Ocean. The Bohai Sea supports diverse marine life and is an important fishing ground, but it faces challenges from nutrient pollution and industrial discharge. The plant's treatment performance directly affects the health of this coastal ecosystem, including nearby wetlands and migratory bird habitats.