Effects of different carbon sources on enhanced biological phosphorus removal and "Candidatus Accumulibacter" community composition under continuous aerobic condition

Nittami T 1 , Mukai M 2 , Uematsu K 2 , Yoon LW 3 , Schroeder S 4 , Chua ASM 5 Show all authors , Fukuda J 6 , Fujita M 7 , Seviour RJ 4

Affiliations 

  • 1 Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan. nittami@ynu.ac.jp
  • 2 Department of Materials Science and Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
  • 3 School of Engineering, Program of Chemical Engineering, Taylor's University, Lakeside Campus, No 1, Jalan Taylor's, 47500, Subang Jaya, Selangor, Malaysia
  • 4 Department of Microbiology, La Trobe University, Bundoora, VIC3086, Australia
  • 5 Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
  • 6 Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
  • 7 Department of Urban and Civil Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki, 316-8511, Japan
Appl Microbiol Biotechnol, 2017 Dec;101(23-24):8607-8619.
PMID: 29063174 DOI: 10.1007/s00253-017-8571-3

Abstract

Previous studies have shown that enhanced biological phosphorus removal (EBPR) performance under continuous aerobic conditions always eventually deteriorates; however, the speed at which this happens depends on the carbon source supplied. The published data suggest that propionate is a better carbon source than acetate is for maintaining operational stability, although it is not clear why. A lab-scale sequencing batch reactor was run initially under conventional anaerobic/aerobic conditions with either acetate or propionate as the carbon source. Chemical and microbiological analyses revealed that both sources performed as expected for such systems. When continuous aerobic conditions were imposed on both these established communities, marked shifts of the "Candidatus Accumulibacter" clades were recorded for both carbon sources. Here, we discuss whether this shift could explain the prolonged EBPR stability observed with propionate.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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