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Nitrification in a vertically moving biofilm system.

M Rodgers1, M G Healy, J Prendergast

  • 1Department of Civil Engineering, National University of Ireland, Galway, Ireland.

Journal of Environmental Management
|September 27, 2005
PubMed
Summary
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A continuous feed biofilm reactor effectively removed ammonium nitrogen from wastewater. The system achieved maximum removal rates under high ammonium loading conditions, demonstrating its efficiency in wastewater treatment.

Area of Science:

  • Environmental Engineering
  • Microbiology
  • Wastewater Treatment

Background:

  • Wastewater treatment is crucial for environmental protection.
  • Biofilm reactors offer a sustainable approach to removing pollutants.
  • Ammonium nitrogen (NH4+-N) is a common contaminant in domestic wastewater.

Purpose of the Study:

  • To evaluate the performance of a laboratory continuous feed biofilm reactor.
  • To assess ammonium nitrogen removal efficiency under increasing loading rates.
  • To determine the maximum ammonium nitrogen removal rate achievable.

Main Methods:

  • A continuous feed biofilm reactor was operated for 257 days.
  • The reactor treated domestic-strength synthetic wastewater.
  • A biofilm plastic module was subjected to vertical movement cycles.

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  • Increasing ammonium nitrogen loading rates were applied.

    • Main Results:

    • The reactor successfully treated wastewater under varying ammonium nitrogen loads.
    • The maximum ammonium nitrogen removal rate was achieved at the highest loading rate (0.70±0.02 kgm-3d-1).
    • An average ammonium nitrogen removal rate of 0.30±0.10 kgm-3d-1 was observed during the maximum loading phase.

    Conclusions:

    • The continuous feed biofilm reactor is effective for ammonium nitrogen removal.
    • The system demonstrates high removal efficiency even under elevated ammonium loading.
    • This technology shows promise for practical wastewater treatment applications.