Zhejiang Wastewater Treatment Plant, Zhuji City | China

The Zhejiang wastewater treatment plant is located in Zhuji City, part of Shaoxing prefecture in Zhejiang Province, China. It serves a population equivalent of 100,000, placing it in the medium-to-large agglomeration category for Chinese municipal wastewater infrastructure. As a Chinese municipal plant, it is subject to the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for conventional pollutants, nutrients, and heavy metals. Plants serving populations over 100,000 typically require secondary biological treatment with nutrient removal to meet Class 1-A or 1-B standards, depending on the receiving water's sensitivity. The plant's treated effluent is discharged into local waterways that ultimately drain into the Qiantang River basin and then into the East China Sea. The region's dense population and industrial activity make effective wastewater treatment critical for protecting downstream aquatic ecosystems and coastal water quality.

The plant discharges into the Qiantang River system, which flows through Zhejiang Province into Hangzhou Bay and the East China Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish species. The downstream coastal zone is ecologically sensitive due to nutrient loading from agricultural and urban runoff, making advanced treatment important for preventing eutrophication.