Mainstream wastewater treatment in integrated fixed film activated sludge (IFAS) reactor by partial nitritation/anammox process
| Autor: | Jozef Trela, Andriy Malovanyy, Elzbieta Plaza |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Nitrogen Bioengineering Wastewater Waste Disposal Fluid chemistry.chemical_compound Bioreactors Nitrate Ammonia Biomass Nitrite Waste Management and Disposal Nitrites Biological Oxygen Demand Analysis Sewage Renewable Energy Sustainability and the Environment Moving bed biofilm reactor Continuous reactor Equipment Design General Medicine Pulp and paper industry Oxygen Activated sludge Chemical engineering chemistry Anammox Biofilms Denitrification Sewage treatment |
| Zdroj: | Bioresource Technology. 198:478-487 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2015.08.123 |
| Popis: | In this study the system based on the combination of biofilm and activated sludge (IFAS - integrated fixed film activated sludge) was tested and compared with a system that relies only on biofilm (MBBR - moving bed biofilm reactor) for nitrogen removal from municipal wastewater by deammonification process. By introduction of suspended biomass into MBBR the nitrogen removal efficiency increased from 36 ± 3% to 70 ± 4% with simultaneous 3-fold increase of nitrogen removal rate. Results of batch tests and continuous reactor operation showed that organotrophic nitrate reduction to nitrite, followed by anammox reaction contributed to this high removal efficiency. After sCOD/NH4-N ratio decreased from 1.8 ± 0.2 to 1.3 ± 0.1 removal efficiency decreased to 52 ± 4%, while still maintaining 150% higher removal rate, comparing to MBBR. Activity tests revealed that affinity of NOB to oxygen is higher than affinity of AOB with half-saturation constants of 0.05 and 0.41 mg/L, respectively. |
| Databáze: | OpenAIRE |
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