Overview
Liaoning wastewater treatment plant serves 125,000 people in Dandong, Liaoning, China. Located within 50 km of the coast, it discharges into local waterways under China's national wastewater standards.
The Liaoning wastewater treatment plant is situated in the Xingang subdistrict of Donggang City, Dandong, Liaoning Province, China. It serves a population of approximately 125,000, classifying it as a medium-to-large agglomeration under Chinese municipal wastewater management. The plant's designed capacity is 1.00 (likely in 10,000 m³/day or similar units), indicating a facility sized for urban wastewater treatment. As a Chinese municipal plant, it operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for COD, BOD, ammonia nitrogen, and other parameters. For plants serving over 100,000 people, Grade I-A or I-B standards typically apply, requiring biological treatment with nutrient removal. Compliance with national standards ensures a minimum level of treatment before discharge. The plant's receiving water body is not explicitly named, but given its location in Donggang City near the Yalu River estuary, treated effluent likely flows into local rivers or directly into the Yellow Sea via coastal drainage. The area is ecologically significant as part of the Yalu River Delta, a critical wetland for migratory birds along the East Asian-Australasian Flyway. The plant's proximity to the coast (within 50 km) underscores the importance of effective nutrient removal to prevent eutrophication in coastal waters.
Environmental context
The plant discharges into the Yalu River system, which flows into the Yellow Sea near the border between China and North Korea. The Yalu River estuary supports diverse aquatic life and is an important migratory corridor for waterbirds. The coastal waters of the Yellow Sea are sensitive to nutrient pollution, making advanced treatment essential for protecting marine ecosystems and fisheries.
Frequently asked questions
The plant is located in the Xingang subdistrict of Donggang City, Dandong, Liaoning Province, China, near the Yalu River estuary and the Yellow Sea coast.
The plant serves approximately 125,000 people, classifying it as a medium-to-large municipal wastewater treatment facility.
Treated effluent is discharged into local waterways that drain into the Yalu River and ultimately the Yellow Sea. The plant is within 50 km of the coast, so discharge may also occur via coastal outfalls.
The plant must comply with China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). For plants serving over 100,000 people, Grade I-A or I-B standards are typical, requiring biological treatment with nutrient removal.
Plants of this scale in China usually employ secondary biological treatment (e. g. , activated sludge) with nutrient removal to meet Grade I-A or I-B standards. Advanced treatment may be added if the receiving water is sensitive.
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