泥龄对反硝化除磷脱氮系统效率的影响分析

反硝化除磷脱氮系统中,生物脱氮与生物除磷是两个相互独立、相互竞争又相互交叉的生理反应过程,存在着硝化菌与聚磷菌的不同泥龄之争。应用数学模式分析了泥龄对氮、磷去除效率的影响,并就反硝化除磷脱氮工艺的单、双级污泥系统的泥龄进行了探讨。推导出以下结论:缩短泥龄可以提高系统的同化除磷能力;长泥龄的生物除磷系统单靠生物作用以期达到完全除磷是几乎不可能的。

Effect of sludge age on efficiency of denitrifying nitrogen and phosphorus removal process

In the denitrifying nitrogen and phosphorus removal system, the biological nitrogen removal and phosphorus removal are the two independent and overlapped processes, and there exists competition for different sludge ages of nitrifying bacteria and phosphorus accumulation organisms (PAOs). In this paper, the numerical model was used to analyze the influence of the sludge age on the efficiency of nitrogen and phosphorus removal, and the sludge age was discussed for the denitrifying nitrogen and phosphorus technique in the single-and two-stage sludge system. Analysis shows that the shortening of the sludge age can improve the capacity of the system in phosphorus removal by assimilation, and that it is impossible for biological phosphorus removal system with a long sludge age to completely remove phosphorus only dependence on the biological effect.