亚硝化/厌氧氨氧化一体化反应器的启动特性分析

Analysis on Start-up Characteristics of SHARON/ANAMMOX Integrative Reactor

以经常规处理后的养猪场废水成功启动自行设计的亚硝化/厌氧氨氧化一体化反应器,着重分析了一体化反应器供氧段和非供氧段的启动特性及处理效果。在启动期间,供氧段对COD、NH4+-N的最大去除率分别达72.24%、71.62%,通过调节曝气量控制系统内的DO浓度实现了稳定的亚硝态氮积累,且出水pH和NO2--N/NH4+-N值满足非供氧段进行厌氧氨氧化的要求;非供氧段可能同时存在反硝化和厌氧氨氧化过程,对NH4+-N、NO2--N的最大去除率分别达55.10%、63.74%,脱氮效果明显;第115天,养猪场废水经一体化反应器处理后,对COD、NH4+-N、TN的去除率分别为73.07%、85.00%、67.23%,达到了深度处理的目的。

The start-up of the self-designed SHARON/ANAMMOX integrative reactor for the treatment of piggery wastewater after conventional treatment was studied. The start-up performance and treatment efficiency of oxygen supply zone and no-oxygen supply zone of the reactor were focused. During the start-up of the reactor, the highest removal rates of COD and NH^＋4 - N are 72.24% and 71.62% respectively in the oxygen supply zone. Stable nitrite nitrogen accumulation can be achieved by regulating aeration rate to control DO, the pH and NO^-2 - N/NH^＋4 - N values of the effluent satisfy the requirements of the ANAMMOX process in the no-oxygen supply zone. The denitrification and ANAMMOX process may occur at the same time in the no-oxygen supply zone. The highest removal rates of NH^＋4 - N and NO^-2 - N are 55.10% and 63.74% respectively, and favorable nitrogen removal efficiency can be achieved. The removal rates of COD, NH^＋4 -N and TN are 73.07% , 85.00% and 67.23% respectively on the llSth day, and the advanced treatment of the piggery wastewater is effectively achieved.