Abstract:

Effect of hydraulic loading for ANAMMOX-denitrification reactor of a 3.2L USAB with biofilm was investigated by modulating the hydraulic loading of reactor in four sequential periods while keeping the influent concentrations of ammonia，nitrite and COD unchanged. At low hydraulic loading，the average removal rates of ammonia，nitrite and COD were 94.1%，97.2% and 89.4%，respectively，and the nitrate production in effluent was 4.35 mg/L. At high hydraulic loading，the average removal rates of ammonia，nitrite and COD showed a marked drop，which were 54.2%，73.9% and 81%，respectively，and the nitrate production in effluent was 9.97 mg/L. Through turning down the hydraulic loading again，the effect of ANAMMOX-denitrification synergistic interaction could be recovered，which demonstrated that the reactor has a certain anti-force capability. Great influence was observed when running the reactor at low temperature，but the microbes in the reactor have capabilities of cold resisting and faster recovery，which would ensure the success in the second start-up of the reactor.

摘要：

采用一套3.2 L具有填料的上流式厌氧污泥床反应器，在固定进水氨氮、亚硝氮和COD浓度的基础上，通过对进水负荷4个阶段的调节，考察其对厌氧氨氧化与反硝化协同反应器运行的影响。经试验发现，在低水力负荷条件下，氨氮、亚硝氮、COD的平均去除率分别达到了94.1%、97.2%和89.4%，出水硝氮的生成量为4.35 mg/L；而在高水力负荷条件下，氨氮、亚硝氮和COD的去除率下降较为明显，为54.2%、73.9%和81%，硝氮的生成量为9.97 mg/L。通过再次调低水力负荷，协同脱氮效果基本上能够恢复到之前的水平，表明反应器具备了一定的抗负荷冲击能力。同时低温会对反应器产生较大影响，但反应器内的菌群具备抵御低温并较快恢复的能力，保证了反应器二次启动的成功。