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首页> 外文期刊>Applied Microbiology and Biotechnology >Evolution of microbial dynamics with the introduction of real seawater portions in a low-strength feeding anammox process
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Evolution of microbial dynamics with the introduction of real seawater portions in a low-strength feeding anammox process

机译：低强度饲料厌氧工艺中真正海水部分引入微生物动力学的演变

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The salinity effect on anammox bacteria has been widely reported; however, rare studies describe the microbial dynamics of anammox-based process response to the introduction of real seawater at mainstream conditions. In this study, an anammox process at mainstream conditions without pre-enriching anammox bacteria was shifted to the feeds of a synthetic wastewater with a portion of seawater mixture. It achieved over 0.180 kg-N/(m(3) day) of nitrogen removal rate with an additional seawater proportion of 20% in the influent. The bacterial biodiversity was significantly increased with the increase of seawater proportions. High relative abundance of anammox bacteria (34.24-39.92%) related to Ca. Brocadia was enriched and acclimated to the saline environment. However, the introduction of seawater caused the enrichment of nitrite-oxidizing Ca. Nitrospira, which was responsible for the deterioration of nitrogen removal efficiency. Possible adaptation metabolisms in anammox bacteria and other nitrogen transforming bacteria are discussed. These results highlight the importance of microbial diversity for anammox process under the saline environments of 20% and 40% seawater composition.
机译：盐度对厌氧菌的影响已被广泛报道;然而，罕见的研究描述了基于厌氧的过程的微生物动态，以在主流条件下引入真正的海水。在该研究中，在没有预先富集的厌氧菌细菌的主流条件下的厌氧过程被移位为具有一部分海水混合物的合成废水的进料。它以超过0.180kg-n /（m（3）天）的氮去除率，在流动的额外海水比例为20％。随着海水比例的增加，细菌生物多样性显着增加。与CA相关的厌氧菌相对丰富的厌氧菌（34.24-39.92％）。繁殖和适应盐水环境的富集。然而，引入海水导致氮石氧化的富集。 Nitrospira，负责氮去除效率的恶化。讨论了厌氧菌细菌和其他氮转化细菌的可能适应代谢。这些结果突出了20％和40％海水组合物的盐环境下厌氧过程的微生物多样性的重要性。

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