Growth characteristic of anaerobic ammonium-oxidizing bacteria in an anaerobic biological filtrated reactor

Kazuichi Isaka, Yasuhiro Date, Tatsuo Sumino, Sachiko Yoshie, Satoshi Tsuneda

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

The doubling time of anaerobic ammonium-oxidizing (anammox) bacteria in an anaerobic biological filtrated (ABF) reactor was determined. Fluorescence in situ hybridization analysis was used to detect and count anammox bacteria cells in anammox sludge. As a result, the populations of anammox bacteria at 14th and 21st days were 1.1×106 and 1.7×107 cells/ml reactor, respectively. From these results, the doubling time of anammox bacteria was calculated as 1.8 days, and the specific growth rate (μ) was 0.39 day-1. This result indicated that the anammox bacteria have higher growth rate than the reported value (doubling time, 11 days). Furthermore, it was clearly demonstrated that nitrogen conversion rate was proportional to the population of anammox bacteria. Maintaining the ideal environment for the growth of anammox bacteria in the ABF reactor might lead to faster growth. This is the first report of the growth rate of anammox bacteria based on the direct counting of anammox bacteria.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalApplied Microbiology and Biotechnology
Volume70
Issue number1
DOIs
Publication statusPublished - 2006 Mar 1

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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