Sustainable nitrogen removal in anammox-mediated systems: Microbial metabolic pathways, operational conditions and mathematical modelling.
Sustainable nitrogen removal in anammox-mediated systems: Microbial metabolic pathways, operational conditions and mathematical modelling.
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DOI：
10.1016/j.scitotenv.2023.161633
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
H. Al-Hazmi;Xi Lu;Dominika Grubba;J. Majtacz;M. Badawi;J. Mąkinia
中科院分区：
文献类型：
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作者：
H. Al-Hazmi;Xi Lu;Dominika Grubba;J. Majtacz;M. Badawi;J. Mąkinia
厌氧氨氧化物介导系统作为可持续去除废水中氮（N）的替代性成本效益技术引起了相当大的关注。本文综述了厌氧氨氧化系统中微生物代谢的重要性，指出了微生物代谢在含氮废水可持续处理中的广泛应用前景。部分硝化-厌氧氨氧化（PN-A）、同步硝化-反硝化（SNAD）工艺已经证明了侧流废水的可持续脱氮。部分酸化-厌氧氨氧化（PD-A）和酸化-厌氧甲烷氧化-厌氧氨氧化（DAMO-A）工艺提高了主流污水处理系统的可持续脱氮效率。此外，N2 O的生产/排放热点被广泛讨论，在厌氧氨氧化工艺和相关的优势氨氧化细菌（AOB）和反硝化异养生物。与此相反，N2 O是不产生的AnAOB和DAMO-古菌的代谢途径;此外，N2 O生产的异化硝酸盐还原铵（DNRA）和DAMO-细菌在其物种的实际贡献仍然不确定。因此，PD-A和DAMO-A工艺将实现温室气体产生的减少，以及能量消耗的可靠性的N去除效率。除了反应机理外，本文还综述了同时厌氧氨氧化、部分硝化和/或反硝化的数学模型（即，PN-A、PD-A和SNAD）。还讨论了通过内源PD、硫驱动的自养反硝化和通过厌氧氨氧化的DNRA的有前途的NO3−还原技术。总之，这篇综述提供了一个更好的理解，可持续的脱氮在厌氧氨氧化物介导的系统，从而鼓励未来的研究和探索的可持续的N生物处理废水。
Anammox-mediated systems have attracted considerable attention as alternative cost-effective technologies for sustainable nitrogen (N) removal from wastewater. This review comprehensively highlights the importance of understanding microbial metabolism in anammox-mediated systems under crucial operation parameters, indicating the potentially wide applications for the sustainable treatment of N-containing wastewater. The partial nitrification-anammox (PN-A), simultaneous PN-A and denitrification (SNAD) processes have demonstrated sustainable N removal from sidestream wastewater. The partial denitrification-anammox (PD-A) and denitrifying anaerobic methane oxidation-anammox (DAMO-A) processes have advanced sustainable N removal efficiency in mainstream wastewater treatment. Moreover, N2O production/emission hotspots are extensively discussed in anammox-based processes and are related to the dominant ammonia-oxidizing bacteria (AOB) and denitrifying heterotrophs. In contrast, N2O is not produced in the metabolism pathways of AnAOB and DAMO-archaea; Moreover, the actual contribution of N2O production by dissimilatory nitrate reduction to ammonium (DNRA) and DAMO-bacteria in their species remains uncertain. Thus, PD-A and DAMO-A processes would achieve reduction in greenhouse gas production, as well as energy consumption for the reliability of N removal efficiencies. In addition to reaction mechanisms, this review covers the mathematical models for simultaneous anammox, partial nitrification and/or denitrification (i.e., PN-A, PD-A, and SNAD). Promising NO3−reduction technologies by endogenous PD, sulfur-driven autotrophic denitrification, and DNRA by anammox are also discussed. In summary, this review provides a better understanding of sustainable N removal in anammox-mediated systems, thereby encouraging future investigation and exploration of the sustainable N bio-treatment from wastewater.