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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
Summary
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.
- 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.