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Updated: May 29, 2026
12:54
Operation of a Benchtop Bioreactor
Published on: September 12, 2013
Sequencing batch biofilm reactor: from support design to reactor operation
1IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
Environmental Technology
|September 3, 2011
Summary
This study enhanced understanding of sequencing batch biofilm reactors (SBBRs) by optimizing support selection for better biofilm formation and improving carbon and nitrogen removal efficiency. Reactor geometry and hydrodynamics were key factors for biofilm accumulation.
Area of Science:
- Environmental Engineering
- Biotechnology
- Wastewater Treatment
Background:
- Sequencing batch biofilm reactors (SBBRs) are effective for wastewater treatment.
- Optimizing support materials and reactor operation is crucial for enhancing SBBR performance.
Purpose of the Study:
- To improve the understanding of SBBRs from support selection to reactor operation.
- To investigate the influence of support characteristics and operational conditions on biofilm formation and pollutant removal.
Main Methods:
- Tested various support materials and geometries in lab-scale SBBRs (2.5 L).
- Evaluated biofilm accumulation based on surface area and material properties.
- Operated a larger-scale SBBR (28 L) to analyze carbon and nitrogen removal during operational cycles.
Main Results:
- Biofilm accumulation was favored on supports with higher internal surface area.
- Support geometry and hydrodynamics played a more significant role than thermodynamic interactions in biofilm formation.
- Observed typical nitrification and denitrification patterns, with acetate utilized for biomass growth and denitrification during the fill phase and stored as poly-beta-hydroxybutyrate during aeration.
Conclusions:
- Support geometry and hydrodynamics are critical for effective biofilm development in SBBRs.
- Optimized support selection and understanding operational phases are key to efficient carbon and nitrogen removal in SBBRs.
- SBBRs demonstrate robust performance for simultaneous nitrification and denitrification with appropriate operational strategies.
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