Abstract：
Low-energy nitrogen removal from ammonium-rich wastewater is crucial in preserving the water environment. A one-stage nitritation/anammox process with two inflows treating ammonium-containing wastewater, supplied from inside and outside the wound filter, is expected to stably remove nitrogen. Laboratory-scale reactors were operated using different start-up strategies; the first involved adding nitritation inoculum after anammox biomass formation in the filter, which presented a relatively low nitrogen removal rate (0.171 kg N/m3 · d), at a nitrogen loading rate of 1.0 kg N/m3 · d. Conversely, the second involved the gradual cultivation of anammox and nitritation microorganisms, which increased the nitrogen removal rate (0.276 kg N/m3 · d). Furthermore, anammox (Candidatus Brocadia) and nitritation bacteria (Nitrosomonadaceae) coexisted in the biofilm formed on the filter surface. The abundance of nitritation bacteria (10.5%) in the reactor biofilm using the second start-up strategy was higher than that using the first (3.7%). Thus, the two-inflow nitritation/anammox process effectively induced habitat segregation using a suitable start-up strategy.
摘要：
富铵废水中的低能脱氮对于保护水环境至关重要。具有两个流入的单级硝化/厌氧氨氧化工艺处理含铵废水，从伤口过滤器的内部和外部供应，有望稳定地去除氮。使用不同的启动策略操作实验室规模的反应器；首先涉及在过滤器中形成厌氧氨氧化生物质后添加亚硝酸化接种物，表现出相对较低的氮去除率(0.171kgN/m3·d)，在1.0kgN/m3·d的氮气负荷下。相反，第二个涉及逐步培养厌氧氨氧化和亚硝化微生物，提高了氮去除率(0.276kgN/m3·d)。此外，anammox（CandidatusBrocadia）和亚硝化细菌（Nitrosomonadaceae）共存于过滤器表面形成的生物膜中。使用第二种启动策略的反应器生物膜中亚硝酸化细菌的丰度（10.5％）高于使用第一种（3.7％）。因此，双流入亚硝化/厌氧氨氧化过程使用合适的启动策略有效地诱导了栖息地隔离。
