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
- mgr inż. Kamil Wiśniewski link open in new tab ,
- Carla Santos,
- Dr. Marcelo Zaiat,
- M. H. R. Z. Damianovic,
- prof. dr hab. inż. Jacek Mąkinia link open in new tab
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2015
