School of Resources and Environment, University of Jinan, Jinan, 250022, PR China.
School of Resources and Environment, University of Jinan, Jinan, 250022, PR China; Anhui Guozhen Environmental Protection Technology Joint Stock Co., Ltd, Hefei, 230088, PR China.
J Environ Manage. 2020 Jul 1;265:110542. doi: 10.1016/j.jenvman.2020.110542. Epub 2020 Apr 7.
The system performance, sludge property and microbial community shift were evaluated in a nitrifying sludge (NS) bioreactor for simultaneous treating p-Nitrophenol (PNP) and high ammonia wastewater. After long-term acclimation for 80 days, the removal efficiencies of PNP and NH-N reached to 99.9% and 99.5%, respectively. Meanwhile, the effluent PNP gradually decreased from 7.9 to 0.1 mg/L by acclimation of sludge. The particle size of NS increased from 115.2 μm to 226.3 μm accompanied by the decreased zeta potential as a self-protection strategy. The presence of PNP exposure altered the effluent soluble microbial products (SMP) fluorescent components and molecular composition. The increase in the relative abundance of Thauera, Nitrospiraceae and Nitrosomonas indicated the nitrification and denitrification capacities of NS increased, which maybe the PNP cometabolic biodegradation effect. Moreover, Ignavibacteria and Aeromonas were responsible as the dominant bacteria for degrading PNP in the nitrifying system.
该系统性能、污泥特性和微生物群落变化在硝化污泥（NS）生物反应器中进行了评价，该生物反应器同时处理对硝基苯酚（PNP）和高氨废水。经过 80 天的长期驯化，PNP 和 NH-N 的去除效率分别达到 99.9%和 99.5%。同时，随着污泥驯化，出水 PNP 逐渐从 7.9 降至 0.1mg/L。NS 的粒径从 115.2μm 增加到 226.3μm，同时zeta 电位降低，这是一种自我保护策略。PNP 暴露改变了出水可溶微生物产物（SMP）荧光成分和分子组成。Thauera、Nitrospiraceae 和 Nitrosomonas 的相对丰度增加表明 NS 的硝化和反硝化能力增强，这可能是 PNP 共代谢生物降解的效果。此外，Ignavibacteria 和 Aeromonas 是硝化系统中降解 PNP 的主要细菌。
