厌氧氨氧化工艺处理高氨氮养殖废水研究

以典型高浓度养殖废水经UASB-短程亚硝化工艺处理后的出水为对象,采用厌氧氨氧化工艺进行脱氮处理研究.以反硝化污泥启动厌氧氨氧化反应器,在此基础上,通过试验确定最佳进水氨氮负荷应处于0.2 kg/(m³·d)左右,系统的HRT定为2 d;通过对系统运行条件研究发现,最佳运行条件为：pH为7.50左右,温度为30℃且系统不需投加有机碳源.在优化条件下,系统最终氨氮去除率能达到85％以上,亚硝态氮去除率达到95％以上,系统运行效果良好,且具有重现性.最后通过动力学理论分析得出氨氮的降解速率为0.012 6 d^－1,亚硝态氮的降解速率为0.013 1 d^-1.通过研究以期为后续工艺、神经网络模拟及“UASB-短程亚硝化-厌氧氨氧化-土地系统"组合新工艺的工程推广应用提供一定的理论依据.

Treatment of ANAMMOX Technique on Treating High Concentration Poultry Wastewater

Taking the effluent of the UASB-shortcut nitrification technique of typical high concentration poultry wastewater as the object,it is discussed that the ANAMMOX is applicable as atreatment of denitrification. Firstly,it successfully starts ANAMMOX reactor by the denitrifying activated sludge,on this basis,finding the optimal ammonia loading is about 0.2 kg/(m3·d) and the HRT of system is 2 d. Moreover,after studying on the operating conditions,the optimum is that pH is about 7.50;temperature is 30℃ without adding organic carbon. Under optimum conditions,the removal efficiencies of ammonia and nitrite nitrogen could be above 85% and 95%,the system is running well and has reproducibility. Finally,it reaches that the reaction rates of ammonia and nitrite nitrogen are 0.012·!6 d-1 and 0.013·!1 d-1 through dynamic analysis. So it can make the theory basis for spreading and application of after/continuous process,neural network simulation and "UASB+SBR shortcut nitrification+ANAMMOX+land treating system" newly combined process.