同步脱氮除磷颗粒污泥硝化反硝化特性试验研究

在厌氧/好氧交替运行的SBR反应器中,以成熟的脱氮除磷颗粒污泥为研究对象,对其硝化及反硝化特性进行研究.结果表明,静态试验中颗粒污泥的最大硝化速率为14.13 mg·(g·h)-1,最大反硝化速率为34.89 mg·(g·h)-1,最大缺氧吸磷反硝化速率为13.11 mg·(g·h)-1,污泥具有较好的硝化、反硝化性能;反应器中污泥最大硝化速率为4.60 mg·(g·h)-1,最大反硝化速率为1.43 mg·(g·h)-1;通过N的物料平衡得到,同步硝化反硝化反应去除N约为232.5 mg·d-1,占N去除总量的54.3%;另外,颗粒污泥对P和N的去除率分别在95%和90%左右,反应器具有较好的同步脱氮除磷效果.

Characteristics of Nitrification and Denitrification for Simultaneous Nitrogen and Phosphorus Removal by Granular Sludge

In the alternating anaerobic/aerobic SBR reactor,the nitrification and denitrification characteristics of simultaneous nitrogen and phosphorus removal by granular sludge were studied. The results of batch experiments indicated that the maximal nitrification rate, denitrification rate, anoxic phosphorus uptake and denitrification rate were 14.13 mg·(g·h)^-1, 34.89 mg·(g·h)^-1 and 13.11 mg·(g·h)^-1, respectively. In SBR, the maximal nitrification rate and denitrification rate were 4.60 mg·(g·h)^-1 and 1.43 mg·(g·h)^-1, respectively, which were lower than those in the batch test. The amount of nitrogen removal by the simultaneous nitrification and denitrification process was approximately 232.5 mg·d^-1, which was 54.3% of the total nitrogen removal. The removal efficiency of N and P was about 90% and 95%, respectively. The simultaneous nitrogen and phosphorus removal by granular sludge showed high efficiency in nitrogen and phosphorus removal.