生物接触氧化法同步短程硝化反硝化影响因素研究

Study on the Influencing Factors of Short-cut Simultaneous Nitrification-denitrification in Biological Contact Oxidation Process

通过调控系统DO、HRT和p H,成功实现流化床生物接触氧化法同步短程硝化反硝化,并探讨各参数对系统亚硝态氮积累的影响规律。实验结果表明亚硝态氮累积率随着DO和HRT的增加而降低,随p H的升高先增加后降低,峰值出现在p H=7,系统实现同步短程硝化反硝化最佳参数为p H=7,DO=2.5 mg/L,HRT=4 h,且在最优参数条件下能稳定维持亚硝态氮累积率为78%,同时保证氨氮的去除率在90%以上。

The shout-cut simultaneous nitrification-denitrification in fluidized bed biological contact oxidation process was implemented successfully by regulating DO （dissolved oxygen）, HRT （hydraulic retention time） and pH of the system. The effects rules of these parameters on nitrite nitrogen accumulation in biological contact oxidation process were investigated. The results demonstrated that the nitrite nitrogen accumulation rate reduced with the increase of DO and HRT. and the rate increased first and declined then with the increase of pH, the peak appeared when pH was 7. Optimal parameters of the shout-cut simultaneous nitrification-denitrification was determined, which were pH=7, DO=2.5 mg/L, HRT=4 h. The nitrite nitrogen accumulation rate was 78 % and the removal rate of NH4＇-N was above 90 % when the system was running under the optimal parameters.