Overview
Zhejiang wastewater treatment plant serves 150,000 people in Gongshu District, Hangzhou, China. It operates under China's national wastewater discharge standards.
The Zhejiang wastewater treatment plant is located in Gongshu District, Hangzhou, Zhejiang Province, China. It serves a population of approximately 150,000, classifying it as a medium-to-large urban agglomeration. The plant is situated in a densely populated area of Hangzhou, a major city in eastern China. As a facility serving 150,000 people, the plant is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which mandates secondary treatment with nutrient removal for plants of this scale. Typical Chinese municipal plants of this size employ activated sludge processes with biological nitrogen and phosphorus removal. The plant discharges treated effluent into local waterways that ultimately drain into the Qiantang River, which flows into Hangzhou Bay and the East China Sea. The receiving water bodies are part of the Yangtze River Delta watershed, a region of high ecological and economic importance. Proper treatment is critical to protect downstream aquatic ecosystems and coastal water quality.
Environmental context
The plant's treated effluent enters the local drainage network, which feeds into the Qiantang River. The Qiantang River flows through Hangzhou and discharges into Hangzhou Bay, an estuary of the East China Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish species. The region's dense population and industrial activity place significant pressure on water quality, making effective wastewater treatment essential for maintaining ecological balance.
Frequently asked questions
The Zhejiang wastewater treatment plant is located in Gongshu District, Hangzhou, Zhejiang Province, China. It serves the urban area of Hangzhou, a major city in eastern China.
The plant serves approximately 150,000 people, classifying it as a medium-to-large urban agglomeration under Chinese wastewater regulations.
The plant discharges treated effluent into local waterways that flow into the Qiantang River, which eventually reaches Hangzhou Bay and the East China Sea.
The plant operates under China's national wastewater discharge standard GB 18918-2002, which sets limits for pollutants like COD, BOD, nitrogen, and phosphorus. Plants serving over 100,000 people typically require secondary treatment with nutrient removal.
For a plant of this scale in China, typical treatment includes primary sedimentation followed by biological treatment (e. g. , activated sludge) with nitrogen and phosphorus removal, often using anaerobic-anoxic-oxic (A2O) processes.
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