The content of trace element iron is a key factor for competition between anaerobic ammonium oxidation and methane-dependent denitrification processes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yong-Ze Lu
  • Liang Fu
  • Na Li
  • Jing Ding
  • Petros Samaras
  • Raymond Jianxiong Zeng

Detail(s)

Original languageEnglish
Pages (from-to)370-376
Journal / PublicationChemosphere
Volume198
Online published1 Feb 2018
Publication statusPublished - May 2018

Abstract

Coupling of anaerobic ammonium oxidation (Anammox) with denitrifying anaerobic methane oxidation (DAMO) is a sustainable pathway for nitrogen removal and reducing methane emissions from waste-water treatment processes. However, studies on the competitive relation between Anammox bacteria and DAMO bacteria are limited. Here, we investigated the effects of variations in the contents of trace element iron on Anammox and DAMO microorganisms. The short-term results indicated that optimal concentrations of iron, which obviously stimulated the activity of Amammox bacteria, DAMO bacteria and DAMO archaea, were 80, 20, and 80 µM, respectively. The activity of Amammox bacteria increased more significant than DAMO bacteria with increasing contents of trace element iron. After long-term incubation with high content of trace element iron of 160 µM in the medium, Candidatus Brocadia (Amammox bacteria) outcompeted Candidatus Methylomirabilis oxyfera (DAMO bacteria), and ANME-2d (DAMO archaea) remarkably increased in number and dominated the co-culture systems (64.5%). Meanwhile, with further addition of iron, the removal rate of ammonium and nitrate increased by 13.6 and 9.2 times, respectively, when compared with that noted in the control. As far as we know, this study is the first to explore the important role of trace element iron contents in the competition between Anammox bacteria and DAMO bacteria and further enrichment of DAMO archaea by regulating the contents of trace element iron.

Research Area(s)

  • Anaerobic ammonium oxidation (Anammox), Denitrifying anaerobic methane oxidation (DAMO), Trace element iron, Competition, Co-culture systems, MEMBRANE BIOFILM REACTOR, ANAMMOX BACTERIA, NITROGEN REMOVAL, SIMULTANEOUS ENRICHMENT, OXIDIZING BACTERIA, WASTE-WATER, NITRITE, COOCCURRENCE, REDUCTION, SOIL

Citation Format(s)

The content of trace element iron is a key factor for competition between anaerobic ammonium oxidation and methane-dependent denitrification processes. / Lu, Yong-Ze; Fu, Liang; Li, Na et al.
In: Chemosphere, Vol. 198, 05.2018, p. 370-376.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review