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Aggregate Formation by a Microbial Community Developing in a Phosphorus-Removing Laboratory Reactor

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Abstract—

During long-term cultivation in a laboratory sequencing batch reactor in the phosphorus removal mode, granule-like aggregates of two morphotypes, differing in their physical structure and microbial composition, with predominance of different microbial physiological groups, were formed out of the activated sludge floccules. Phosphate-accumulating bacteria Candidatus “Accumulibacter” prevailed in one morphotype, and glycogen-accumulating bacteria Candidatus “Competibacter,” in the other. These are aerobic microorganisms, known to compete for the substrate during the anaerobic period of the anaerobic/aerobic cultivation cycle. Aggregate formation paralleled development of phosphate-accumulating microorganisms, increase in their relative abundance, and higher phosphorus removal efficiency.

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Funding

The work was supported by the Russian Science Foundation, grant no. 21-64-00019 and by the Russian Federation Ministry of Science and Higher Education.

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Authors and Affiliations

  1. Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia

    A. V. Pelevina, Yu. Yu. Berestovskaya, A. G. Dorofeev, Yu. A. Nikolaev & N. V. Pimenov

  2. Skryabin Institute of Bioengineering, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia

    E. V. Grouzdev & A. V. Mardanov

Authors
  1. A. V. Pelevina
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  2. Yu. Yu. Berestovskaya
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  3. A. G. Dorofeev
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  4. Yu. A. Nikolaev
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  5. E. V. Grouzdev
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  6. N. V. Pimenov
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  7. A. V. Mardanov
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Corresponding author

Correspondence to Yu. Yu. Berestovskaya.

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Translated by P. Sigalevich

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Pelevina, A.V., Berestovskaya, Y.Y., Dorofeev, A.G. et al. Aggregate Formation by a Microbial Community Developing in a Phosphorus-Removing Laboratory Reactor. Microbiology 92 (Suppl 1), S33–S36 (2023). https://doi.org/10.1134/S0026261723603469

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  • DOI: https://doi.org/10.1134/S0026261723603469

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