Accelerated start-up of a partial nitritation-anammox moving bed biofilm reactor
| Autor: | Somnath Basu, Alessandro di Biase, Maciej S. Kowalski, Jan A. Oleszkiewicz, Tanner R. Devlin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Environmental Engineering Moving bed biofilm reactor Biomedical Engineering Biofilm Biomass Bioengineering Pulp and paper industry complex mixtures 01 natural sciences Dewatering 03 medical and health sciences chemistry.chemical_compound chemistry Wastewater Anammox 010608 biotechnology Specific surface area Nitrite 030304 developmental biology Biotechnology |
| Zdroj: | Biochemical Engineering Journal. 145:83-89 |
| ISSN: | 1369-703X |
| DOI: | 10.1016/j.bej.2019.02.015 |
| Popis: | The formation of anammox biofilm is a lengthy process, leading to reactor start-up times of several months even with addition of anammox inoculum. To demonstrate the effectiveness of combining bio-primer technique with seed carriers in further accelerating the start-up time of anammox reactors a pilot moving bed biofilm reactor was set-up at a dewatering facility of a municipal wastewater treatment plant. The reactor was filled to 40% with plastic media with a specific surface area of 402 m2 m−3 and was operated at 34 ± 1 °C. Using bio-primer coated media it was shown that a surface nitrogen removal rate of 2.5 g-N m-2 d-1 could be achieved in as little as 56 days. Free ammonia (FA) was thought to be the predominant inhibitor of nitrite oxidizing bacteria activity rather than the selective wash-out of nitrifying biomass. A minimum FA concentration of 2 mg NH3-N L-1 was suggested for optimal performance of partial nitritation and to prevent the build-up of nitrates. Biomass from the pilot reactor had developed a specific anammox activity of 19 ± 2 mg-N g-VSS-1 h-1 which was 75% higher than the seed biomass from an anammox-only reactor fed with synthetic wastewater. |
| Databáze: | OpenAIRE |
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