Zhejiang Wastewater Treatment Plant, Longwan District, Wenzhou, China

The Zhejiang wastewater treatment plant is located in Longwan District, Wenzhou, within Zhejiang Province, China. It serves a population of approximately 450,000, classifying it as a large agglomeration under Chinese wastewater management standards. The plant's designed capacity is 1.00, indicating its scale in handling municipal wastewater. As a facility in China, the plant operates under the national Water Pollution Prevention and Control Law, which mandates treatment standards based on receiving water sensitivity. For large agglomerations like this, secondary treatment with nutrient removal is typically required, especially in areas near sensitive water bodies. Regulatory expectations align with China's discharge standards for urban wastewater treatment plants (GB 18918-2002). The plant is situated within 50 km of the coast, suggesting its treated effluent likely discharges into a river or directly into the East China Sea via the Oujiang River system. This proximity to coastal waters necessitates stringent treatment to protect marine ecosystems and coastal water quality. The plant plays a key role in managing wastewater from a densely populated urban area, contributing to the health of downstream aquatic environments.

The plant's treated effluent likely enters the Oujiang River, which flows through Wenzhou and discharges into the East China Sea. This coastal region supports diverse marine life and is important for local fisheries. The plant's discharge must meet standards to prevent eutrophication and protect sensitive coastal habitats, including tidal flats and estuaries that serve as nursery grounds for fish and migratory birds.