Overview
Zhejiang wastewater treatment plant serves 40,000 people in Gongshu District, Hangzhou, Zhejiang Province, China. It operates under national discharge standards for municipal wastewater.
The Zhejiang wastewater treatment plant is located in Gongshu District, Hangzhou, Zhejiang Province, China. It serves a population of approximately 40,000, placing it in the medium agglomeration category for Chinese municipal wastewater infrastructure. China's wastewater treatment regulations, including the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), require secondary treatment as a baseline for plants of this scale. Typical facilities in this region employ activated sludge processes with nutrient removal to meet Class 1A or 1B standards. The treated effluent is discharged into local waterways that ultimately drain into the Qiantang River, which flows into Hangzhou Bay and the East China Sea. The plant plays a key role in protecting the Qiantang River watershed from untreated sewage, supporting aquatic life and downstream water quality in a densely populated urban area.
Environmental context
The plant discharges into the Qiantang River basin, which flows through Hangzhou and into Hangzhou Bay, a major estuary on the East China Sea. The watershed supports diverse aquatic ecosystems and is an important migratory corridor for fish species. Effective treatment is critical to prevent eutrophication and protect coastal water quality in the bay.
Frequently asked questions
The plant is located in Gongshu District, Hangzhou, Zhejiang Province, China, near the intersection of Changzheng Bridge and Hemu Road in Xiaohe Subdistrict.
The plant serves approximately 40,000 people, classifying it as a medium-sized municipal wastewater treatment facility.
The plant treats wastewater that would otherwise enter the Qiantang River basin, which flows through Hangzhou and into Hangzhou Bay on the East China Sea.
The plant operates under China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for COD, BOD, ammonia, and phosphorus. Plants serving 40,000 people typically require secondary treatment with nutrient removal.
For medium agglomerations in China, standard treatment includes secondary biological processes such as activated sludge, often enhanced with anaerobic-anoxic-oxic (A2O) configurations for nitrogen and phosphorus removal to meet Class 1A or 1B standards.
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