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首页> 外文期刊>Environmental Science & Technology >Overcoming Nitrite Oxidizing Bacteria Adaptation through Alternating Sludge Treatment with Free Nitrous Acid and Free Ammonia
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Overcoming Nitrite Oxidizing Bacteria Adaptation through Alternating Sludge Treatment with Free Nitrous Acid and Free Ammonia

机译：通过用亚硝酸和游离氨交替处理污泥来克服亚硝酸盐氧化细菌的适应性

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摘要

Stable suppression of nitrite oxidizing bacteria (NOB) is one of the major bottlenecks for achieving mainstream nitrite shunt or partial nitritation/anammox (PN/A). It is increasingly experienced that NOB could develop resistance to suppressions over an extended time, leading to failure of nitrite shunt or PN/A. This study reports and demonstrates the first effective strategy to overcome NOB adaptation through alternating sludge treatment with free nitrous acid (FNA) and free ammonia (FA). During over 650 days of reactor operation, NOB adaptation to both FNA and FA was observed, but the adaptation was successfully overcome by deploying the alternate treatment strategy. Microbial community analysis showed Nitro-spira and Nitrobacter, the key NOB populations in the reactor, have the ability to adapt to FNA and FA, respectively, but do not adapt to the alternation. Stable nitrite shunt with nitrite accumulation ratio over 95% and excellent nitrogen removal were maintained for the last 10 months with only one alternation applied. N2O emission increased initially as the attainment of nitrite shunt but exhibited a declining trend during the study. By using on-site-produced nitrite and ammonium, the proposed strategy is feasible and sustainable. This study brings the mainstream nitrite shunt and PN/A one step closer to wide applications.
机译：稳定抑制亚硝酸盐氧化细菌（NOB）是实现主流亚硝酸盐分流或部分亚硝化/厌氧氨（PN / A）的主要瓶颈之一。越来越多的经验表明，NOB在较长的时间内会产生抑制作用，导致亚硝酸盐分流或PN / A失效。这项研究报告并证明了通过交替使用游离亚硝酸（FNA）和游离氨（FA）处理污泥来克服NOB适应性的第一个有效策略。在超过650天的反应堆运行期间，观察到NOB对FNA和FA都适应，但是通过采用替代处理策略成功克服了这种适应。微生物群落分析表明，反应器中关键的NOB种群硝化螺菌和硝化细菌分别具有适应FNA和FA的能力，但不适应轮换。在过去的10个月中，仅需进行一次交替操作，即可保持亚硝酸盐积累率超过95％的稳定亚硝酸盐分流器和出色的脱氮效果。 N2O排放最初随着亚硝酸盐分流的实现而增加，但在研究过程中呈下降趋势。通过使用现场生产的亚硝酸盐和铵盐，该策略是可行和可持续的。这项研究使主流的亚硝酸盐分流器和PN / A更接近于广泛的应用。

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  • 来源
    《Environmental Science & Technology》 |2019年第4期|1937-1946|共10页
  • 作者

    Duan Haoran; Ye Liu; Lu Xuanyu; Yuan Zhiguo;

  • 作者单位

    Univ Queensland, AWMC, St Lucia, Qld 4072, Australia;

    Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia;

    Univ Queensland, AWMC, St Lucia, Qld 4072, Australia|Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia;

    Univ Queensland, AWMC, St Lucia, Qld 4072, Australia;

  • 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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  • 正文语种 eng
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