Exploration and practice of energy conservation and consumption reduction in an underground wastewater treatment plant in Zhengzhou

Against the backdrop of the “dual carbon” goals， exploring how underground wastewater treatment plants can enhance process innovation and scientific regulation based on their own characteristics， and maximize the use of existing conditions to achieve energy conservation and consumption reduction， remains an urgent issue for the wastewater treatment industry. By analyzing the main power consumption components and operating modes of high-power electrical equipment， an underground wastewater treatment plant in Zhengzhou successfully reduced its average annual power consumption from 0.416 kW·h/m³ to 0.340 kW·h/m³ through precise aeration， optimized equipment operation， and technological innovation， representing an 18.27% effective decrease in specific power consumption. Notably， indicators including the air-water ratio， electricity consumption per ton of water for blowers， annual electricity consumption per ton of water for influent pumps， and annual electricity consumption of ventilation fans and lighting facilities all decreased significantly， with each reduction exceeding 5%. This practice has yielded remarkable results in energy conservation and consumption reduction， and the plant's production and operation capacity has reached an advanced level in terms of energy consumption for urban wastewater treatment in some regions. It provides a practical reference for the low-carbon operation of similar underground wastewater treatment plants.