亚硝酸型SND工艺中DO的选择

Choice of DO in Nitrite Type SND

为了准确、快捷地选定亚硝酸型同时硝化/反硝化生物脱氮工艺(简称亚硝酸型SND工艺)的最适宜溶解氧浓度(DO)并优化该工艺的控制过程,探讨了最佳DO的影响因素及操作过程中DO的选择方法。由于氨氮浓度、有机物浓度、氧传质阻力和构筑物类型等许多操作条件对DO的影响非常复杂,对其研究还不广泛和深入,目前DO的选择一般参照经验值或通过现场试验研究来确定。

The pertinent factors and choice methods of the optimal DO were discussed to fast and accurately choose the optimal DO in Nitrite type simultaneous nitrification/denitrification biological nitrogen removal process and to optimize the control process. The choice of optimal DO was determined according to experience or tests on the spot, because many operational conditions such as NH3N concentration, organic substance concentration, resistance of oxygen transfer and types of reactors have complicated effect on DO and up to now, there was no wide and profound research on them,to DO is chosen.