QiYaole,YanYingying,LiQiang,et al.Assessment Practice of Aeration System under the Background of Creating Low Carbon Benchmark Plant for Sewage Treatment[J].China Water & Wastewater,2026,42(14):35-41.
污水处理低碳标杆厂创建背景下曝气系统评估实践
- Title:
- Assessment Practice of Aeration System under the Background of Creating Low Carbon Benchmark Plant for Sewage Treatment
- Keywords:
- sewage treatment plant; aeration system; analysis of oxygen supply and demand; oxygen transfer efficiency; potential for saving aeration volume
- 摘要:
- 摘要： 曝气系统通常是污水处理过程中能耗最大的单元，按照加快建设污水处理绿色低碳标杆厂的行业发展要求，对六安市某典型城市污水处理厂的曝气系统进行量化评估并提出针对性的优化建议。基于不同运行环境的物质流分析结果，解析了该污水处理厂理论需氧量的变化规律，结合智能曝气监测系统实现对生化池实际氧转移效率、逸出CO2含量等参数的实时监测，准确量化曝气系统实际充氧能力，进而厘清曝气系统的气量节约潜力。该厂的研究结果表明，好氧段作为曝气系统的关键环节，研究时段内日均充氧量为10 512 kg/d，约为日均需氧量（7 059 kg/d）的1.5倍。在来水理论需氧量<9 000 kg/d时，过度曝气现象较为突出。对照试验表明，利用智能曝气监测系统指导风量控制效果良好。
- Abstract:
- The aeration system is generally the most energy-intensive unit in the wastewater treatment process. In line with the industry’s goal of accelerating the development of green and low- carbon benchmark sewage treatment plants, a quantitative assessment was conducted on the aeration system of a typical urban sewage treatment plant in Lu’an, followed by targeted optimization recommendations. Based on material flow analysis under different operating conditions, the variation patterns of the theoretical oxygen demand in the sewage treatment plant were examined. By integrating an intelligent aeration monitoring system, real-time tracking of key parameters—such as the actual oxygen transfer efficiency and CO2 emission levels in the biochemical tank—was achieved. This enabled accurate quantification of the actual oxygen supply capacity of the aeration system and clarified its potential for air-saving optimization. The results of the case plant indicate that the aerobic stage, as the core segment of the aeration system, had a daily average oxygen input of 10 512 kg/d during the study period—approximately 1.5 times the average daily oxygen demand of 7 059 kg/d. Excessive aeration was notably observed when the theoretical oxygen demand of the influent was below 9 000 kg/d. Comparative tests demonstrated that using the intelligent aeration monitoring system to regulate air supply volume yielded effective control performance.
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