Exploring the operating factors controlling Kouleothrix (type 1851), the dominant filamentous bacterial population, in a full-scale A2O plant
Exploring the operating factors controlling Kouleothrix (type 1851), the dominant filamentous bacterial population, in a full-scale A2O plant
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DOI：
10.1038/s41598-020-63534-2
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发表时间：
2020-04
影响因子：
4.6
通讯作者：
Tadashi Nittami;Risa Kasakura;Toshimasa Kobayashi;Kota Suzuki;Y. Koshiba;J. Fukuda;M. Takeda;Tomohiro Tobino;F. Kurisu;Daniel T. F. Rice;S. Petrovski;R. Seviour
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作者：
Tadashi Nittami;Risa Kasakura;Toshimasa Kobayashi;Kota Suzuki;Y. Koshiba;J. Fukuda;M. Takeda;Tomohiro Tobino;F. Kurisu;Daniel T. F. Rice;S. Petrovski;R. Seviour
这项研究表明，丰富的pesticentKouleothrix（Eikelboom型1851）正相关的活性污泥生物量在日本全面的营养物去除废水处理厂采样超过一年的时间内，与穷人的沉降能力。16SrRNA扩增产物序列分析结果表明，红藻是红藻的优势丝状体，其相对丰度与污泥体积指数（SVI）呈显著正相关（R= 0.691），相关系数为3.06%。此外，Kouleothrix（1851型）似乎形成interfloc桥，典型的膨胀污泥，无论季节。与早期的研究表明，ofKouleothrix（1851型）的膨胀事件的责任，这些数据表明，他们的高相对丰度单独可能是负责污泥膨胀。该丝状体的16S rRNA qPCR数据显示其相对丰度的变化与几个操作参数的变化相关，包括混合液温度，污泥停留时间和悬浮固体浓度，并且可能是操纵这些可能有助于控制Kouleothrixbulking。
This study reveals that the abundance of the filamentKouleothrix(Eikelboom type 1851) correlated positively with poor settleability of activated sludge biomass in a Japanese full-scale nutrient removal wastewater treatment plant sampled over a one-year period. 16S rRNA amplicon sequence data confirmed thatKouleothrixwas the dominant filament in the plant, with a relative abundance of 3.06% positively correlated with sludge volume index (SVI) (R= 0.691). Moreover,Kouleothrix(type 1851) appeared to form interfloc bridges, typical of bulking sludge, regardless of season. Together with earlier studies that indicated the responsibility ofKouleothrix(type 1851) on bulking events, these data suggest that their high relative abundances alone may be responsible for sludge bulking. 16S rRNA qPCR data for this filament showed changes in its relative abundance correlated with changes in several operational parameters, including mixed liquor temperature, sludge retention time, and suspended solids concentration, and it may be that manipulating these may help controlKouleothrixbulking.