交替曝气两级生物滤池除磷工艺挂膜启动研究

为克服传统BAF工艺生物除磷效果差的缺点，开发了厌氧／好氧交替BAF生物除磷工艺。在水温为25～28℃的条件下，采用3阶段“闷曝阶段、小流量逐渐增加负荷连续进水阶段、交替曝气阶段”的方式启动交替曝气两级生物滤池反应器，前2阶段主要是培养好氧异养菌，第3阶段是培养驯化除磷微生物。试验结果表明，经前2阶段后，COD去除率为76．09％；第3阶段结束时，TP去除率为72．31％，COD去除率达到80％以上。本反应器挂膜启动完成时间为14d。

Research on Film Formation and Start-up of Phosphorus Removal in Two-stage Biological Filter by Alternating Aeration

In order to overcome the shortcoming of the traditional BAF process on biological phosphorus removal capacity, the BAF biological phosphorus removal process of alternating anaerobic and aerobic capability is developed. Under the conditions of water temperature between 25 ～ 28 ℃, three phases ＂stuffy aeration phase, the phase of a small flow water for gradually increasing in the load, the turn of the aeration phase＂ were used to start up the reactor of phosphorus removal with two-stage biological filter. The former two stages mainly cultivate aerobic heterotrophic bacteria. The third phase was to domesticate microorganism of phosphorus removal. The experimental results showed that： COD removal rate was 76. 09% after the former two stages, while the TP removaI efficiency was 72.31% and COD removal rate reached more than 80% at the end of the third phase. This reactor needed 14 days for the film formation and start-up.