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Abstract
An up-flow structured-bed reactor subjected to recirculation and intermittent aeration (SBRRIA) was operated under varying influent conditions. The influent COD/N ratio was adjusted by maintaining a stable organic loading rate (average of 1.07 kgCOD m-3 d-1) and changing the nitrogen loading rate from 0.1 to 0.4 kg N m-3. Therefore, three different COD/N ratios were tested: 9.7±1 (Scenario 1); 7.6±1 (Scenario 2) and 2.9±1 (Scenario 3). In conditions with the reduced COD/N ratio (Scenario 3), the reactor removed 0.339 kg N m-3, achieving total-N and COD removal efficiencies of 85% and 96%, respectively. Subsequently, the start-up and operation of this reactor was modeled with the Activated Sludge Model No 1 (ASM1), extended for two-step nitrification-denitrification and anammox process. Simulations demonstrated a good prediction for NH4-N removal, i.e. R² = 0.95 for simulated NH4-N effluent concentration, resulting from inclusion of the anammox activity under conditions of low electron availability for heterotrophic denitrification.
Authors (5)
-
Carla Santos
- School of Engineering of Sao Carlos, University of Sao Paulo Department of Hydraulics and Sanitation
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Marcelo Zaiat Dr.
- School of Engineering of Sao Carlos, University of Sao Paulo Department of Hydraulics and Sanitation
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M. H. R. Z. Damianovic
- School of Engineering of Sao Carlos, University of Sao Paulo Department of Hydraulics and Sanitation
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Keywords
Details
- Category:
- Conference activity
- Type:
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Title of issue:
- CONFERENCE PROCEEDINGS: IWA Specialist Conference on NUTRIENT REMOVAL AND RECOVERY: MOVING INNOVATION INTO PRACTICE strony 799 - 806
- Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Wiśniewski K., Santos C., Zaiat M., Damianovic M., Mąkinia J.: Nitrogen mass balance and mathematical model of a Structured- Bed Reactor (SBRRIA)// CONFERENCE PROCEEDINGS: IWA Specialist Conference on NUTRIENT REMOVAL AND RECOVERY: MOVING INNOVATION INTO PRACTICE/ : , 2015, s.799-806
- Verified by:
- Gdańsk University of Technology
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