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首页> 外文期刊>Environmental Science & Technology >Importance of Species Sorting and Immigration on the Bacterial Assembly of Different-Sized Aggregates in a Full-Scale Aerobic Granular Sludge Plant
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Importance of Species Sorting and Immigration on the Bacterial Assembly of Different-Sized Aggregates in a Full-Scale Aerobic Granular Sludge Plant

机译：物种分类和移民对全规模的有氧颗粒污泥植物中不同尺寸骨料细菌组装的重要性

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摘要

In aerobic granular sludge (AGS) systems, different-sized microbial aggregates having different solids retention time (SRT) coexist in the same reactor compartment and are subjected to the same influent wastewater. Thus, the AGS system provides a unique ecosystem to study the importance of local (species sorting) and regional (immigration) processes in bacterial community assembly. The microbial communities of different-sized aggregates (flocs 0.2 mm, small granules (0.2-1.0 mm) and large granules 1.0 mm), influent wastewater, excess sludge and effluent of a full-scale AGS plant were characterized over a steady-state operation period of 6 months. Amplicon sequencing was integrated with mass balance to determine the SRT and net growth rate of operational taxonomic units (OTUs). We found strong evidence of species sorting as opposed to immigration, which was significantly higher at short SRT (i.e., flocs and small granules) than that at long SRT (large granules). Rare OTUs in wastewater belonging to putative functional groups responsible for nitrogen and phosphorus removal were progressively enriched with an increase in microbial aggregates size. In contrast, fecal- and sewage infrastructure-derived microbes progressively decreased in relative abundance with increase in microbial aggregate size. These findings highlight the importance of AGS as a unique model ecosystem to study fundamental microbial ecology concepts.
机译：在有氧颗粒污泥（AGS）系统中，具有不同固体保留时间（SRT）在相同的反应器室中共存的不同尺寸的微生物聚集体，并进行相同的流水废水。因此，AGS系统提供了独特的生态系统，以研究本地（种类分类）和区域（移民）过程在细菌群落组件中的重要性。不同尺寸的聚集体（Flocs <0.2mm，小颗粒（0.2-1.0mm）和大颗粒> 1.0mm）的微生物群落，流水废水，过量污泥和完整的AGS植物的流出物的特征在于稳定 - 国家运营期为6个月。扩增子测序与质量平衡一体化，以确定运营分类单位（OTUS）的SRT和净生长速率。我们发现了对物种分类的强有力证据，而不是移民，在短的SRT（即絮状物和小颗粒）下显着高于Long SRT（大颗粒）。属于调用官能团的废水中的罕见Otus逐步富集，逐渐富集微生物聚集体大小。相比之下，粪便和污水结构衍生的微生物在相对丰度中逐渐降低，随着微生物聚集体大小的增加。这些调查结果突出了AGS作为研究基本微生物生态学概念的独特模型生态系统的重要性。

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  • 来源
    《Environmental Science & Technology》 |2019年第14期|8291-8301|共11页
  • 作者

    Ali Muhammad; Wang Zhongwei; Salam Khaled W.; Hari Ananda Rao; Pronk Mario; van Loosdrecht Mark C. M.; Saikaly Pascal E.;

  • 作者单位

    King Abdullah Univ Sci & Technol Water Desalinat & Reuse Ctr Biol & Environm Sci & Engn Div Thuwal 239556900 Saudi Arabia;

    King Abdullah Univ Sci & Technol Water Desalinat & Reuse Ctr Biol & Environm Sci & Engn Div Thuwal 239556900 Saudi Arabia;

    Univ Washington Dept Civil & Environm Engn Seattle WA 98195 USA;

    King Abdullah Univ Sci & Technol Water Desalinat & Reuse Ctr Biol & Environm Sci & Engn Div Thuwal 239556900 Saudi Arabia|Hamad Bin Khalifa Univ Div Sustainable Dev Doha Qatar;

    Delft Univ Technol Dept Biotechnol NL-2629 HZ Delft Netherlands;

    Delft Univ Technol Dept Biotechnol NL-2629 HZ Delft Netherlands;

    King Abdullah Univ Sci & Technol Water Desalinat & Reuse Ctr Biol & Environm Sci & Engn Div Thuwal 239556900 Saudi Arabia;

  • 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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