Guizhou Wastewater Treatment Plant, Guiding County | Inland Municipal Facility

The Guizhou wastewater treatment plant is located in Guiding County, within the Qiannan Buyei and Miao Autonomous Prefecture of Guizhou Province, China. It serves a population of approximately 56,000 residents, classifying it as a medium-sized municipal facility in this mountainous inland region. As a Chinese wastewater treatment plant, it operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits based on the receiving water's environmental sensitivity. For inland plants like this one, Grade 1-A or 1-B standards typically apply, requiring biological treatment with nutrient removal to protect local water bodies. The plant's treated effluent is discharged into local waterways that eventually drain into the Yangtze River basin via the Wu River system. This watershed supports diverse aquatic life and provides water for agriculture and communities downstream. Proper treatment is essential to prevent eutrophication and maintain water quality in this ecologically sensitive region.

The plant discharges into tributaries of the Wu River, a major Yangtze River tributary that flows through Guizhou's karst landscape. The downstream environment includes ecologically sensitive areas that support freshwater biodiversity and provide drinking water sources. Effective nutrient removal is critical to prevent algal blooms in the Yangtze River system, which ultimately reaches the East China Sea.