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首页> 外文期刊>Environmental Science & Technology >Anammox Granules Acclimatized to Mainstream Conditions Can Achieve a Volumetric Nitrogen Removal Rate Comparable to Sidestream Systems
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Anammox Granules Acclimatized to Mainstream Conditions Can Achieve a Volumetric Nitrogen Removal Rate Comparable to Sidestream Systems

机译：厌氧颗粒适应主流条件，可以实现与侧流系统相当的体积氮去除率

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摘要

The implementation of mainstream anammox has gained increasing attention. In this study, the feasibility of using sidestream anammox granules to start up mainstream reactors was investigated by comparing two switching strategies. A maximum nitrogen removal potential of 3.6 ± 0.2 kg N m~3 d~1 was obtained for the reactor after direct switching to mainstream conditions (70 mg TN L~1, 15°C). Nevertheless, the reactor preacclimatized to 25 °C (Ma) exhibited a higher nitrogen removal potential of 7.0 ± 0.3 kg N m~3 d~1 at 15 °C, which is the highest volumetric nitrogen removal rate of mainstream anammox reactors to date. Candidatus Kuenenia stuttgartiensis was identified as the dominant anammox bacterium, and its relative abundance in two reactors remained stable throughout the whole operation (200 days). Moreover, with the aid of acclimatization, the activation energy was reduced and the specific growth rate became higher. These results indicated that the physiological evolution of the dominant anammox bacterium instead of interspecies selection was the main reason for the high potential during the switch to mainstream conditions. Therefore, using sidestream anammox granules as seed sludge to start up mainstream reactors was demonstrated to be feasible, and a switching strategy of acclimatization at 25 °C was recommended.
机译：主流厌氧的实施增加了越来越关注。在这项研究中，通过比较两种切换策略，研究了使用侧流厌氧氧氧氧氧颗粒开始主流反应器的可行性。在直接切换到主流条件（70mg Tn L〜1,15℃）后，在反应器中获得最大氮去除电位为3.6±0.2kg N m〜3d〜1。然而，将反应器定义为25℃（mA），在15℃下表现出7.0±0.3kg N m〜3 d〜1的氮去除电位。至今的主流厌氧反应器的最高体积氮去除率。 Candidatus Kuenenia Stuttgartiensis被鉴定为主要的厌​​氧菌细菌，其两个反应器中的相对丰度在整个操作中保持稳定（200天）。此外，借助于适应性化，降低了活化能量，并且具体的生长速率变得更高。这些结果表明，优势厌氧菌细菌的生理演变而不是占星症的选择是开关到主流条件的高潜力的主要原因。因此，使用SiveStream anammox颗粒作为种子污泥以启动主流反应器是可行的，建议使用25℃的适应性的切换策略。

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  • 来源
    《Environmental Science & Technology》 |2020年第20期|12959-12966|共8页
  • 作者

    Ya-Fei Cheng; Zheng-Zhe Zhang; Gui-Feng Li; Qian Zhang; Xia-Ping Zheng; Shuang Cai; Yuan Xue; Bao-Cheng Huang; Ren-Cun Jin;

  • 作者单位

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

    Laboratory of Water Pollution Remediation School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 311121 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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