School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
J Environ Manage. 2021 Sep 1;293:112906. doi: 10.1016/j.jenvman.2021.112906. Epub 2021 Jun 1.
Numerous researches have been carried out to study the effects of emerging contaminants in wastewater, such as antibiotics, nanomaterials, heavy metals, and microplastics, on the anammox process. However, they are fragmented and difficult to provide a comprehensive understanding of their effects on reactor performance and the metabolic mechanisms in anammox bacteria. Therefore, this paper overviews the effects on anammox processes by the introduced emerging contaminants in the past years to fulfill such knowledge gaps that affect our perception of the inhibitory mechanisms and limit the optimization of the anammox process. In detail, their effects on anammox processes from the aspects of reactor performance, microbial community, antibiotic resistance genes (ARGs), and functional genes related to anammox and nitrogen transformation in anammox consortia are summarized. Furthermore, the metabolic mechanisms causing the cell death of anammox bacteria, such as induction of reactive oxygen species, limitation of substrates diffusion, and membrane binding are proposed. By offering this review, the remaining research gaps are identified, and the potential metabolic mechanisms in anammox consortia are highlighted.
已经开展了大量研究来探讨废水中新兴污染物（如抗生素、纳米材料、重金属和微塑料）对厌氧氨氧化过程的影响。然而，这些研究较为分散，难以全面了解它们对反应器性能和厌氧氨氧化菌代谢机制的影响。因此，本文综述了近年来引入的新兴污染物对厌氧氨氧化过程的影响，以填补这些影响我们对抑制机制的认识并限制厌氧氨氧化过程优化的知识空白。具体而言，从反应器性能、微生物群落、抗生素抗性基因（ARGs）以及与厌氧氨氧化和氮转化相关的功能基因等方面总结了它们对厌氧氨氧化过程的影响。此外，还提出了导致厌氧氨氧化菌细胞死亡的代谢机制，如活性氧的诱导、底物扩散的限制和膜结合。通过提供这篇综述，确定了剩余的研究空白，并强调了厌氧氨氧化菌中的潜在代谢机制。
