Overview
Sichuan wastewater treatment plant serves 7,300 people in Chuanzhusi Town, Songpan County, Sichuan, China. The facility operates under China's national wastewater standards for small agglomerations.
The Sichuan wastewater treatment plant is located in Chuanzhusi Town (川主寺镇), Songpan County, within the Aba Tibetan and Qiang Autonomous Prefecture of Sichuan Province, China. It serves a population of approximately 7,300 residents, classifying it as a small-scale municipal facility in a high-altitude, ecologically sensitive region near the eastern edge of the Tibetan Plateau. As a Chinese wastewater treatment plant serving fewer than 10,000 people, it falls under China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002). This national standard requires secondary treatment as a baseline, with more stringent limits for facilities discharging into sensitive water bodies. The plant's location in a mountainous, tourism-oriented area suggests potential additional requirements for nutrient removal to protect downstream ecosystems. The plant discharges into local waterways that ultimately feed into the Min River system, a major tributary of the Yangtze River. The region is known for its biodiversity and proximity to the Huanglong and Jiuzhaigou scenic areas, making proper wastewater treatment critical for preserving water quality in this ecologically important watershed.
Environmental context
The plant's treated effluent flows into streams within the Min River basin, which drains southeastward into the Yangtze River and eventually the East China Sea. The surrounding area includes alpine wetlands and forests that support diverse aquatic life, including endemic fish species. The high-altitude environment (elevation ~3,000 m) means colder water temperatures and slower biodegradation rates, increasing the importance of effective treatment to prevent nutrient buildup in receiving waters.
Frequently asked questions
The plant is located in Chuanzhushi Town (川主寺镇), Songpan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province, China.
The plant serves approximately 7,300 residents in the Chuanzhushi area, a small agglomeration in a mountainous region of western Sichuan.
The plant discharges into local streams that feed the Min River system, a major tributary of the Yangtze River. This watershed supports critical ecosystems in the eastern Tibetan Plateau.
China's GB 18918-2002 standard requires secondary treatment for all municipal plants, with stricter limits for sensitive areas. Small plants serving under 10,000 people may use simpler technologies but must meet discharge standards to protect receiving waters.
Typical treatment for this scale includes primary sedimentation followed by biological treatment such as activated sludge or sequencing batch reactors. Disinfection is often required, and nutrient removal may be needed if discharging into sensitive water bodies.
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