Overview
Zhejiang wastewater treatment plant serves Tonglu County, Hangzhou, Zhejiang, China, with a population equivalent of 100,000. It operates under China's national wastewater discharge standards.
The Zhejiang wastewater treatment plant is located in Tonglu County, part of Hangzhou City in Zhejiang Province, China. It serves a population of approximately 100,000, classifying it as a medium-to-large agglomeration under Chinese municipal wastewater regulations. As a plant serving this population size, it is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which mandates secondary treatment with nutrient removal for plants of this scale. Typical facilities in this region employ activated sludge processes with biological nitrogen and phosphorus removal to comply with local water quality standards. The plant discharges treated effluent into the local watershed, which ultimately drains into the Fuchun River, a tributary of the Qiantang River that flows into Hangzhou Bay and the East China Sea. This downstream water body supports diverse aquatic life and is an important ecological corridor in the region.
Environmental context
The plant's treated effluent enters the Fuchun River system, which flows into the Qiantang River and eventually reaches Hangzhou Bay and the East China Sea. This watershed supports a variety of freshwater and estuarine species, and the plant's nutrient removal is critical to prevent eutrophication in downstream coastal waters. The region is also known for its scenic landscapes and agricultural activities, making water quality protection essential.
Frequently asked questions
The plant is located in Tonglu County, Hangzhou City, Zhejiang Province, China.
The plant serves a population equivalent of 100,000 people.
The treated effluent is discharged into the local watershed, which flows into the Fuchun River, a tributary of the Qiantang River, eventually reaching Hangzhou Bay and the East China Sea.
The plant operates under China's national standard GB 18918-2002, which sets discharge limits for municipal wastewater treatment plants. For a plant serving 100,000 people, secondary treatment with nutrient removal is typically required.
Plants of this scale in China generally employ secondary biological treatment with nutrient removal, such as the activated sludge process, to meet the GB 18918-2002 standards for nitrogen and phosphorus.
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