工艺仿真在污水处理厂溶解氧控制中的应用

Application of Process Simulation for DO Control in WWTP

市政污水处理厂曝气池的溶解氧水平对于氨氮和总氮的去除至关重要。利用工艺仿真技术重现某污水处理厂的运行现状,在此基础上模拟不同溶解氧水平下的出水情况,最终筛选出能保证出水水质达标的溶解氧目标值组合。参照经过优化的溶解氧目标值,控制实际污水厂曝气池溶解氧水平,结果显示,当溶解氧浓度稳定维持在设定溶解氧目标值时,出水水质能够稳定达标。

The dissolved oxygen control(DO control)of the municipal wastewater treatment plant(WWTP)is significant for nitrogen removal.On the basis of reproducing the process of a WWTP by simulation,the effluent quality was predicted in the case of different DO setting values.Then the appropriate combination of DO set-points were determined for the DO control of actual biological tank.And the results indicated that when DO levels were around the DO set-points steadily,the effluent quality could meet the standards through DO control system.