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化工学报  2014 

水力停留时间对生物膜/颗粒污泥耦合工艺脱氮除磷的影响

DOI: 10.3969/j.issn.0438-1157.2014.06.046, PP. 2294-2300

Keywords: 水力停留时间,生物膜,颗粒污泥,耦合

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Abstract:

采用自主设计的悬浮载体生物膜/颗粒污泥耦合装置,利用硝化菌载体生物膜和反硝化聚磷菌颗粒污泥,研究水力停留时间对生物膜/颗粒污泥耦合工艺脱氮除磷的影响,得出最佳工艺参数。试验考查水力停留时间分别为6h、7h、8.5h和10.5h,结果表明,当水力停留时间为8.5h时,系统的COD去除率为91.26%,氨氮和总氮的去除率分别为80.68%和70.58%,厌氧释磷速率也较稳定,为0.47mgP·(gSS)-1·h-1,厌氧释磷速率最高,其碳源利用率最大,反硝化除磷效率最稳定,PO43--P去除率为76.50%,反硝化除磷效率为1.04mgP·(mgNO3--N)-1,所以当水力停留时间为8.5h时,系统具有较高的脱氮除磷效率。当水力停留时间过短时,氮磷的去除不完全,过长时,系统不稳定,系统的最优水力停留时间为8.5h。

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