Henan Wastewater Treatment Plant, Mengzhou, Henan Province, China

The Henan wastewater treatment plant is located in Mengzhou City, within the Dading subdistrict of Jiaozuo, Henan Province, China. It serves a population of approximately 96,600, classifying it as a medium-to-large agglomeration under Chinese municipal wastewater management. As a plant in China, it is subject to the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits for conventional pollutants, nutrients, and heavy metals. For plants of this scale, secondary biological treatment is typically required, with potential nutrient removal in sensitive watersheds. The plant discharges into the local water system, which ultimately drains into the Yellow River basin. The Yellow River is a major waterway in northern China, supporting agriculture, industry, and ecosystems. Proper treatment is essential to protect downstream water quality and aquatic life.

The plant is located in the Yellow River basin, one of China's most important river systems. The Yellow River flows through arid and semi-arid regions, where water quality is critical for irrigation and domestic use. Downstream, the river supports diverse aquatic habitats and provides water for millions of people. Effective wastewater treatment helps reduce nutrient and pollutant loads, safeguarding the river's ecological health.