Aerobic biodegradation of p-nitrophenol in a nitrifying sludge bioreactor: System performance, sludge property and microbial community shift
Aerobic biodegradation of p-nitrophenol in a nitrifying sludge bioreactor: System performance, sludge property and microbial community shift
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硝化污泥生物反应器中对硝基苯酚的好氧生物降解：系统性能、污泥特性和微生物群落变化。
DOI：
10.1016/j.jenvman.2020.110542
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发表时间：
2020
影响因子：
8.7
通讯作者：
Hongxun Hou
中科院分区：
文献类型：
--
作者：
Mingrun Li;Dong Wei;Liangguo Yan;Qingwei Yang;Lulu Liu;Weiying Xu;Bin Du;Qian Wang;Hongxun Hou
在同时处理对硝基苯酚（PNP）和高氨废水的硝化污泥（NS）生物反应器中评估了系统性能、污泥性质和微生物群落变化。经过80天的长期驯化，PNP和NH4+-N的去除率分别达到99.9%和99.5%。同时，通过污泥的驯化，出水 PNP 逐渐从 7.9 mg/L 降至 0.1 mg/L。 NS 的粒径从 115.2 μm 增加到 226.3 μm，同时降低 Zeta 电位作为自我保护策略。 PNP 暴露的存在改变了流出物可溶性微生物产物 (SMP) 的荧光成分和分子组成。 Thaauera、Nitrospiraceae和Nitrosomonas相对丰度的增加表明NS的硝化和反硝化能力增强，这可能是PNP的共代谢生物降解效应。此外，Ignavibacteria和Aeromonas是硝化系统中降解PNP的优势菌。
The system performance, sludge property and microbial community shift were evaluated in a nitrifying sludge (NS) bioreactor for simultaneous treatingp-Nitrophenol (PNP) and high ammonia wastewater. After long-term acclimation for 80 days, the removal efficiencies of PNP and NH4+-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 ofThauera, NitrospiraceaeandNitrosomonasindicated the nitrification and denitrification capacities of NS increased, which maybe the PNP cometabolic biodegradation effect. Moreover,IgnavibacteriaandAeromonaswere responsible as the dominant bacteria for degrading PNP in the nitrifying system.