MUCT-MBR工艺反硝化除磷脱氮研究

自行设计的双反应器MUCT-MBR简化了MUCT工艺，将反应池由5个简化到2个，减小了工艺占地面积，并且采用膜过滤取代二沉池出水，操作简单，出水安全可靠.针对MUCT-MBR工艺脱氮除磷性能，尤其是反硝化除磷功能进行研究.结果表明，当进水C/N/P比在33.3/5/1～25/5.5/1范围内，整个实验过程中COD、 TN和TP平均去除率分别达到89.3%、 75.4%、 79.2%；且膜出水不受污泥沉降性的影响.缺氧段的反硝化吸磷是MUCT-MBR工艺除磷的关键，系统运行至第58 d，系统中反硝化除磷菌（DPAOs）所占比例达84.2%，反硝化除磷占系统总磷去除的67.07%.

Denitrifying Phosphorus Removal in MUCT-MBR

The self-designed MUCT-MBR simplifies the MUCT process with reducing reactors from 5 to 2, which greatly reduces land occupied by equipment. Instead of secondary sedimentation tank, the membrane effluent quality is quite safe, and the operation is simple. In the investigation about simultaneous phosphorus and nitrogen removal of MUCT-MBR, the results showed that: when the proportions of C, N and P in the influent were 33.3/5/1-25/5.5/1, the average removal rate of COD, TN and TP in the whole experimental process were 89.3%, 75.4% and 79.2%, respectively. And the sludge settling capacity had no influence on the membrane effluent quality. The key factor of N and P removal rates is denitrifying phosphorus removal in anoxic condition. The proportion of denitrifying phosphate accumulating organisms (DPAOs) and the rate of denitrifying phosphorous removal were 84.2% and 67.07% on the 58th day, respectively.