曝气生物流化床处理高氨氮粪便污水

Treatment of high-strength ammonium fecal wastewater by aeration biological fluidized bed

应用好氧曝气生物流化床反应器处理动车集便器粪便污水,研究反应器同步硝化反硝化脱氮及去除COD效能,以及DO对处理效能的影响,通过镜检观察反应器内微生物特性,探究反应器同步硝化反硝化脱氮机理。结果表明,反应器维持DO在2.5 mg/L左右时,对粪便污水中氨氮、TN和COD的去除率分别达99.8%、84.1%和95.5%,在好氧曝气生物流化床反应器中,实现同步硝化反硝化脱氮并去除有机物。分析认为,反硝化脱氮主要发生在生物膜内的厌氧微环境,反硝化反应主要由厌氧反硝化菌完成,曝气生物流化床反应器同步硝化反硝化脱氮机理主要从微环境理论解释。

The performance of simultaneous nitrification and denitrification （SND） and COD removal under different dissolved oxygen （DO） concentrations in the aeration biological fluidized bed （ABFB） treating the fecal wastewater from the CRH train toilet were studied. The simultaneous nitrification and de-nitrification mechanism was also studied based on the observation on the characteristic of microorganism by microscopic examination. The results show that oxidation of organic matter, nitrification and denitrification happened simultaneously, at the DO concentration of 2.5 mg/L, the removal rates of NH3-N, TN and COD were 99.8% , 84.1% , and 95.5% , re- spectively. The denitrification mainly occurred in anaerobic microenvironment within the biomembrane, and the anaerobic de-nitrifying bacteria were in charge of the de-nitrification. Simuhaneous nitrification and de-nitrifica- tion mechanism occurred in the ABFB could be explained by micro-environment theory.