(AO)_2SBR同步脱氮除磷的研究

以人工配水为研究对象,采用厌氧/好氧/缺氧/好氧交替运行的序批式反应器,研究了(AO)2SBR系统同步脱氮除磷的效果,并结合批式实验讨论了同步脱氮除磷的反应机理。研究结果表明,该系统以厌氧1.5 h、好氧1 h、缺氧3h、好氧0.5 h的方式运行,在DO=2.5 mg/L,SRT=15 d的条件下,具有良好的脱氮除磷效果,配水中的总氮、总磷、COD和总有机碳的去除率分别为96.26%、99.87%、90.46%和85.57%。批式实验表明,合成的内碳源越多,氨氮的硝化越充分,反硝化除磷越多。

Simultaneous nitrogen and phosphorus removal in an anaerobic/aerobic/anoxic/aerobic sequencing batch reactor

In this study,experiments were performed by the operating manner of anaerobic/aerobic/anoxic/ aerobic in a sequencing batch reactor ( SBR) which was fed with synthetic wastewater. The effect of simultaneous nitrogen and phosphorus removal in the system of ( AO)_2SBR was studied , the mechanism of coinstantaneous ni-trogen and phosphorus removal was further discussed combined with small-batch experiments. Under the following conditions : DO = 2. 5 mg/L, SRT = 15 d, the system operated by the manner of 1. 5 h anaerobic、1.0 h aerobic、 3.0 h anoxic 、0. 5 h aerobic , had a good removal effect of nitrogen and phosphorus, the removal efficiency of total nitrogen , total phosphorus,COD and TOC for synthetic wastewater was 96. 26% ,99. 87% ,90. 46% ,85. 57%, re-spectively. The result shows that the more amount of inner carbon synthesized and the morequantity of ammonia nitrificated, the higher the removal rate of nitrogen and phosphorus by the small-batch experiments.