Defining microbial community composition and seasonal variation in a sewage treatment plant in India using a down-flow hanging sponge reactor

Naoki Nomoto, Masashi Hatamoto, Yuga Hirakata, Muntjeer Ali, Komal Jayaswal, Akinori Iguchi, Tsutomu Okubo, Masanobu Takahashi, Kengo Kubota, Tadashi Tagawa, Shigeki Uemura, Takashi Yamaguchi, Hideki Harada

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The characteristics of the microbial community in a practical-scale down-flow hanging sponge (DHS) reactor, high in organic matter and sulfate ion concentration, and the seasonal variation of the microbial community composition were investigated. Microorganisms related to sulfur oxidation and reduction (2–27%), as well as Leucobacter (7.50%), were abundant in the reactor. Anaerobic bacteria (27–38% in the first layer) were also in abundance and were found to contribute to the removal of organic matter from the sewage in the reactor. By comparing the Simpson index, the abundance-based coverage estimator (ACE) index, and the species composition of the microbial community across seasons (summer/dry, summer/rainy, autumn/dry, and winter/dry), the microbial community was found to change in composition only during the winter season. In addition to the estimation of seasonal variation, the difference in the microbial community composition along the axes of the DHS reactor was investigated for the first time. Although the abundance of each bacterial species differed along both axes of the reactor, the change of the community composition in the reactor was found to be greater along the vertical axis than the horizontal axis of the DHS reactor.

Original languageEnglish
Pages (from-to)4381-4392
Number of pages12
JournalApplied Microbiology and Biotechnology
Volume102
Issue number10
DOIs
Publication statusPublished - 2018 May 1

Keywords

  • DHS (down-flow hanging sponge)
  • Developing country
  • Microbial community composition
  • Sewage treatment

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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