Recently, partial denitrification (PDN) - anaerobic ammonium oxidation (anammox) process has been widely studied in activated sludge for nitrate wastewater treatment. However, achieving PDN-Anammox in biofilter for domestic wastewater treatment was never reported. In this study, two lab-scale PDN biofilter and Anammox biofilter were built up to treat simulated domestic wastewater. The results showed that stable nitrogen removal performance was kept with averaged effluent nitrogen of 10.2 mg/L. Stable nitrite accumulation performance was achieved with low abundance of nitrite reductase gene, while influent composition influenced nitrogen transformation pathway in PDN biofilter. When treating domestic wastewater, nitrification and partial denitrification led to the higher nitrite accumulation ratio of 75.4%. The percentage contribution of anammox biofilter was 74.6% for nitrogen removal, and Candidatus Brocadia was dominant genus. After long-term operation, limited substrate concentration caused interspecific competition among various anammox bacteria, leading to an increasing proportion of Candidatus Brocadia fulgida. PDN-Anammox biofilter is a feasible process to advanced wastewater treatment, which could save aeration consumption and carbon source addition, and reduce sludge production.

近年来，部分脱硝（PDN）-厌氧铵氧化（anammox）工艺已被广泛用于处理硝酸盐废水的活性污泥中。但是，从未报道过在生物滤池中实现用于家庭废水处理的PDN-Anammox。在这项研究中，建立了两个实验室规模的PDN生物滤池和Anammox生物滤池来处理模拟生活污水。结果表明，平均出水氮为10.2 mg / L时，脱氮性能保持稳定。亚硝酸还原酶基因的低丰度实现了稳定的亚硝酸盐积累性能，而进水组成影响了PDN生物滤池中氮的转化途径。在处理生活废水时，硝化和部分反硝化导致较高的亚硝酸盐积累率为75.4％。Brocadia假丝酵母是优势属。长期操作后，有限的底物浓度导致各种厌氧菌之间的种间竞争，导致枝假丝酵母的比例增加。PDN-Anammox生物滤池是一种用于废水深度处理的可行方法，可以节省曝气消耗和碳源添加，并减少污泥的产生。