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首页> 外文期刊>Environmental Science & Technology >Effect of Flow Configuration on Nitrifiers in Biological Activated Carbon Filters for Potable Water Production
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Effect of Flow Configuration on Nitrifiers in Biological Activated Carbon Filters for Potable Water Production

机译：流动配置对饮用水生产生物活性炭过滤器中氮化物的影响

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摘要

Up-flow biological activated carbon (BAC) filters have been empirically employed in drinking water treatment plants (DWTPs) to address the challenges of its down-flow counterparts (e.g., high head loss and insufficient use of BAC beds), yet their performances and mechanisms toward ammonia removal are not fully evaluated. This study characterized the occurrence, distribution, and diversities of nitrifiers in up-flow and down-flow BAC filters by investigating 18 full-scale drinking water treatment trains in different geographic locations. Quantitative polymerase chain reaction analysis of gene markers of target microorganisms demonstrated higher numbers of total bacteria, ammonia-oxidizing bacteria (AOB), and Nitrospira in the up-flow filters relative to the down-flow filters (P < 0.05), implying enhanced biological activities and nitrification potential within up-flow filters. The dominance of ammonia-oxidizing archaea (AOA) over AOB (i.e., 1.3-4.0 log_(10) gene copies higher) in 17 BAC filters illustrated the critical role of AOA in drinking water nitrification. Stratification of biomass was mainly found in the down-flow filters rather than the up-flow filters, suggesting better mixing of filter media across up-flow filter beds. Analysis of similarity results revealed that the AOA and Nitrospira community compositions were mainly affected by water sources and locations (P < 0.05) but not flow configurations. These results provide insight into nitrification mechanisms in BAC filters with different flow configurations in real-world DWTPs.
机译：上流生物活性炭（BAC）过滤器已经经验用于饮用水处理植物（DWTPS），以解决其下流路边的挑战（例如，高头损失和BAC床的使用不足），但其性能和没有完全评估氨氨的机制。本研究通过研究不同地理位置的18个全规模饮用水处理列车，其特征在于通过调查18个全规模的饮用水处理列车在上流和羽流量的BAC过滤器中的发生，分布和多样性。靶微生物基因标志物的定量聚合酶链反应分析显示出较高数量的总细菌，氨氧化细菌（AOB），相对于下流滤光器（P <0.05），暗示增强的生物学上流滤波器内的活动和硝化潜力。 17个BAC过滤器中AOB（即1.3-4.0 log_（10）基因拷贝更高）氨氧化archaea（AOA）的优势显示了AOA在饮用水硝化中的关键作用。生物质的分层主要发现在下流滤波器中而不是上流滤波器，表明过滤介质跨越上流过滤床的更好混合。相似性的分析表明，AOA和Nitrospira群落组合物主要受水源和位置的影响（P <0.05）但不流动配置。这些结果在具有不同流动配置中，在现实世界DWTPS中提供了对BAC过滤器中的硝化机制的洞察力。

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  • 来源
    《Environmental Science & Technology》 |2020年第22期|14646-14655|共10页
  • 作者

    Min Rui; Haoshen Chen; Yinyin Ye; Huiping Deng; Hong Wang;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Municipal Engineering Design Institute (Group) Co. Ltd. Shanghai 200092 China;

    State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Municipal Engineering Design Institute (Group) Co. Ltd. Shanghai 200092 China;

    Biological Sciences Division Pacific Northwest National Laboratory Richland Washington 99354 United States Department of Civil Structural and Environmental Engineering University at Buffalo Buffalo New York 14260 United States;

    State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P.R China;

    State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P.R 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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