Overview
Zhejiang wastewater treatment plant serves Chun'an County in Zhejiang, China, treating wastewater for approximately 20,000 residents. The facility discharges into the local watershed, contributing to the protection of Qiandao Lake.
The Zhejiang wastewater treatment plant is located in Chun'an County, part of Hangzhou City in Zhejiang Province, China. It serves a population of around 20,000 people in the Qiandao Lake area, a region known for its scenic reservoir and tourism. The plant is situated inland, away from coastal zones, and its operations are critical for maintaining water quality in this ecologically sensitive area. As a facility serving a medium-sized agglomeration, it is expected to comply with China's national wastewater discharge standards, which mandate secondary treatment for urban wastewater. Typical plants of this scale in China employ biological treatment methods such as activated sludge to meet Class 1A or 1B discharge standards. The treated effluent is discharged into the local water system, which ultimately flows into Qiandao Lake (also known as Thousand Island Lake), a large artificial reservoir that supplies drinking water and supports tourism and fisheries. The lake drains into the Xin'an River, which flows eastward to the Qiantang River and eventually into the East China Sea. Protecting this watershed is vital for downstream ecosystems and human use.
Environmental context
The plant discharges into the Qiandao Lake watershed, a major artificial reservoir in Zhejiang Province that serves as a drinking water source and supports diverse aquatic life. The lake drains via the Xin'an River into the Qiantang River, which flows into Hangzhou Bay and the East China Sea. The region is ecologically sensitive due to tourism and water supply demands, requiring effective nutrient removal to prevent eutrophication.
Frequently asked questions
The plant is located in Chun'an County, Hangzhou City, Zhejiang Province, China, near Qiandao Lake.
The plant serves approximately 20,000 residents in the Chun'an County area.
The treated effluent is discharged into the local watershed that feeds Qiandao Lake, which flows into the Xin'an River and eventually the East China Sea.
Chinese wastewater treatment plants must comply with the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets limits for pollutants like COD, BOD, and nutrients. Plants serving populations over 10,000 typically require secondary treatment.
Qiandao Lake is a major drinking water source and tourist attraction, so the plant must meet strict discharge standards to prevent nutrient pollution and protect water quality. Advanced treatment may be required to control phosphorus and nitrogen.
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