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首页> 外文期刊>Environmental Science: Water Research & Technology >Enhancing the stability and efficiency of the anammox process in plug-flow integrated fixed-film activated sludge (IFAS) reactors through alternating anoxic/aerobic (A~3) conditions
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Enhancing the stability and efficiency of the anammox process in plug-flow integrated fixed-film activated sludge (IFAS) reactors through alternating anoxic/aerobic (A~3) conditions

机译：通过交替的缺氧/好氧（A〜3）条件提高活塞流集成固定膜活性污泥（IFAS）反应器中厌氧氨氧化工艺的稳定性和效率

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摘要

The breakthrough of this study was the development of plug-flow integrated fixed-film activated sludge (IFAS) reactors operated with alternating anoxic/aerobic (A(3)) conditions for enhanced anammox processes. The energy-saving capacity and efficiency of this A(3)-IFAS system was compared with an identical IFAS reactor operated with continuous low oxygen aeration (CLOA) through a test period of 141 days. At the nitritation start-up phase, the nitrite in the effluent of the A(3)-IFAS system quickly accumulated to 77.9%, which was higher than that of the CLOA-IFAS system (61.7%). The A(3)-IFAS system reached 94.1 +/- 4.0% of total inorganic nitrogen (TIN) removal in the stabilization stage, which was higher than that in the CLOA-IFAS system (66.7 +/- 5.3%). A(3)-IFAS maintained stable partial nitrification and TIN removal, whereas the nitritation in CLOA-IFAS was disturbed on the 96th day and the TIN removal became unstable. Quantitative real-time polymerase chain reaction (qPCR) analysis indicated that ammonia-oxidizing bacteria (AOB) were dominant in both IFAS reactors, while the amount of nitrite-oxidizing bacteria (NOB) in the CLOA-IFAS system was 5.27 times that in the A(3)-IFAS system. The kinetic analysis revealed that the ratio of the AOB specific growth rate (mu(AOB)) and NOB specific growth rate (mu(NOB)) in A(3)-IFAS was 4.09, which was higher than that (3.1) in the CLOA-IFAS system, implying that the low growth rate of NOB in anoxic zones is the main reason for the stable nitritation and high TN removal in A(3)-IFAS.
机译：这项研究的突破是开发了可在缺氧/好氧（A（3））交替条件下运行的活塞流集成固定膜活性污泥（IFAS）反应器，以增强厌氧氨氧化工艺。该A（3）-IFAS系统的节能能力和效率与通过连续低氧曝气（CLOA）运行的相同IFAS反应器进行了141天的测试期进行了比较。在硝化启动阶段，A（3）-IFAS系统流出物中的亚硝酸盐迅速累积至77.9％，高于CLOA-IFAS系统的61.7％。在稳定阶段，A（3）-IFAS系统达到去除总无机氮（TIN）的94.1 +/- 4.0％，高于CLOA-IFAS系统中的去除率（66.7 +/- 5.3％）。 A（3）-IFAS保持稳定的部分硝化和TIN去除，而第96天CLOA-IFAS中的硝化受到干扰，TIN去除变得不稳定。实时定量聚合酶链反应（qPCR）定量分析表明，氨氧化细菌（AOB）在两个IFAS反应器中均占主导地位，而CLOA-IFAS系统中亚硝酸盐氧化细菌（NOB）的数量是FIA-IFAS系统中的5.27倍。 A（3）-IFAS系统。动力学分析表明，A（3）-IFAS中AOB比生长速率（mu（AOB））和NOB比生长速率（mu（NOB））之比为4.09，高于在A（3）-IFAS中的（3.1）。 CLOA-IFAS系统，表明缺氧区NOB的低增长率是A（3）-IFAS中稳定硝化和高TN去除的主要原因。

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    Liu Chao; Liu Wenlong; Wu Lei; Peng Yongzhen;

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    Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China;

    Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Heilongjiang, Peoples R China;

    Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China;

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