VACOMASS曝气气体精确分配与控制系统的应用

Application of VACOMASS Air Distribution and Control System

分析了VACOMASS曝气气体精确分配与控制系统在太湖新城污水处理厂应用过程中的工艺运行数据,结果显示,自引进该套系统后各曝气控制区的溶解氧浓度均稳定控制在设定值(±0.3 mg/L)范围内,同时确保缺氧段内溶解氧浓度<0.5 mg/L,保障了缺氧池反硝化反应的稳定、高效进行,出水水质明显得到改善。抽样检测显示,试验池出水TN的平均浓度较对比池的低1.35 mg/L;出水TP浓度较对比池的低0.12 mg/L;出水NH 4+-N浓度则两池相当,但试验池较对比池明显稳定,其波动范围为0.41～0.66 mg/L,而对比池的为0.34～1.47 mg/L。此外,在改善出水水质的基础上节省了电耗,以单方水电耗作比较,试验池较对比池节电约27.02%;以去除单位污染物电耗相比较,试验池较对比池节电约26.05%。

The technical operation data of VACOMASS air distribution and control system used in the Taihu Xincheng WWTP were analyzed. The result shows that after the system is used, the concentration of dissolved oxygen is stably controlled within the set value （ ± 0.3 mg/L）, while the concentration of dissolved oxygen in the anoxic zone is guaranteed to be below 0.5 mg/L, ensuring steady and efficient denitrification reaction in the anoxic tank, and the effluent quality is apparently improved. Sampling inspections confirm that the concentration of TN in the effluent from the testing tank is less than that from the control tank by 1.35 mg/L on average. The concentration of TP in the effluent from the testing tank is less than that from the control tank by 0.12 mg/L. The effluent NH4＋ - N concentrations from both tanks are equivalent, but the effluent NH4＋ - N concentration from the testing tank with the fluctuation range of 0.41 to 0.66 mg/L is much stabler than that from the control tank with the fluctuation range of 0.34 to 1.47 mg/L. Moreover, with the improvement of the effluent quality, the power consumption is decreased correspondingly. By comparing power consumption per cubic meter water in both tanks, the testing tank saves 27.02% compared with the control tank, and by comparing power consumption per unit pollutant removal, the testing tank saves 26.05% compared with the control tank.