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The Start-up of Mainstream Anammox Process Is Limited Only by Nitrite Supply

  • Y. Law
  • S. Swa Thi
  • X. M. Chen
  • T. Q. N. Nguyen
  • T. W. Seviour
  • R. B. H. Williams
  • B. Ni
  • S. Wuertz
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 4)

Abstract

In this study, we investigated start-up of an Anammox bioprocess from a secondary activated sludge seed fed primary effluent from a domestic used water reclamation plant (WRP). To test the hypothesis that an anammox-enriched sludge could still be achieved under such conditions given enough nitrite and ammonium, nitrite was supplemented at a molar ratio of 2:1 to ammonium. Anammox activity was observed within 50 d of operation and the relative abundance of Anammox bacteria increased from <0.1% gradually up to 4% after 100 d of operation, concomitant with complete ammonium removal. Despite consumption of chemical oxygen demand (COD) by heterotrophic denitrifiers, the Anammox biomass continued to accumulate up to 20% of relative abundance, contributing to biofilm and granule formation in the reactor. Thus, a high influent COD concentration is not inhibitory to the start-up of an Anammox system as long as sufficient nitrite is provided.

Keywords

Nitrogen removal Denitrification Biofilm 

Notes

Acknowledgements

This research was supported by the Singapore National Research Foundation under its Environment & Water Research Programme and administered by PUB, project number 1301-IRIS-59.

References

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Y. Law
    • 1
  • S. Swa Thi
    • 1
  • X. M. Chen
    • 2
  • T. Q. N. Nguyen
    • 1
  • T. W. Seviour
    • 1
  • R. B. H. Williams
    • 3
  • B. Ni
    • 2
  • S. Wuertz
    • 1
  1. 1.Singapore Centre for Environmental Life Sciences EngineeringNanyang Technological UniversitySingaporeSingapore
  2. 2.Advanced Water Management CentreThe University of QueenslandSt LuciaAustralia
  3. 3.Singapore Centre for Environmental Life Sciences EngineeringNational University of SingaporeSingaporeSingapore

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