Lackner, Susanne ; Terada, Akihiko ; Horn, Harald ; Henze, Mogens ; Smets, Barth F. (2010)
Nitritation Performance in Membrane Aerated Biofilm Reactors differs from conventional Biofilm Systems.
In: Water Research, 44 (20)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nitrogen removal via nitrite has gained increasing attention in recent years due to its potential cost savings. Membrane-aerated biofilm reactors (MABRs) are one potential technology suitable to achieve nitritation. In this study we compared lab scale MABRs with conventional biofilm reactors to evaluate the influence of environmental conditions and operational parameters on nitritation performance. The oxygen mass transfer rate is postulated as a crucial parameter to control nitritation in the MABR: Clean water measurements showed significant underestimation of the total oxygen mass transfer, however, accurate determination of the oxygen mass transfer coefficient (k(m)) of the system could be achieved by adjusting the liquid-phase mass transfer resistance in the constructed model. Batch experiments at different initial ammonium concentrations revealed that the conventional biofilm geometry was superior for nitritation compared to MABRs. These differences were reflected well in estimates of the oxygen affinity constants of the key microbial players, AOB and NOB (K(O,AOB) < K(O,NOB) (in both systems) and K(O,NOB) values smaller in the MABR vs. the conventional biofilm system). It also appeared that - in addition to oxygen limitation - the absolute and relative substrate concentrations in the biofilm (esp. of oxygen) are very important for successful nitritation. Initial biomass composition, furthermore, impacted reactor performance in the MABR systems indicating the need for appropriate inoculum choice.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Lackner, Susanne ; Terada, Akihiko ; Horn, Harald ; Henze, Mogens ; Smets, Barth F. |
| Art des Eintrags: | Bibliographie |
| Titel: | Nitritation Performance in Membrane Aerated Biofilm Reactors differs from conventional Biofilm Systems |
| Sprache: | Englisch |
| Publikationsjahr: | 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Water Research |
| Jahrgang/Volume einer Zeitschrift: | 44 |
| (Heft-)Nummer: | 20 |
| Kurzbeschreibung (Abstract): | Nitrogen removal via nitrite has gained increasing attention in recent years due to its potential cost savings. Membrane-aerated biofilm reactors (MABRs) are one potential technology suitable to achieve nitritation. In this study we compared lab scale MABRs with conventional biofilm reactors to evaluate the influence of environmental conditions and operational parameters on nitritation performance. The oxygen mass transfer rate is postulated as a crucial parameter to control nitritation in the MABR: Clean water measurements showed significant underestimation of the total oxygen mass transfer, however, accurate determination of the oxygen mass transfer coefficient (k(m)) of the system could be achieved by adjusting the liquid-phase mass transfer resistance in the constructed model. Batch experiments at different initial ammonium concentrations revealed that the conventional biofilm geometry was superior for nitritation compared to MABRs. These differences were reflected well in estimates of the oxygen affinity constants of the key microbial players, AOB and NOB (K(O,AOB) < K(O,NOB) (in both systems) and K(O,NOB) values smaller in the MABR vs. the conventional biofilm system). It also appeared that - in addition to oxygen limitation - the absolute and relative substrate concentrations in the biofilm (esp. of oxygen) are very important for successful nitritation. Initial biomass composition, furthermore, impacted reactor performance in the MABR systems indicating the need for appropriate inoculum choice. |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung > Fachgebiet Abwasserwirtschaft 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung 13 Fachbereich Bau- und Umweltingenieurwissenschaften |
| Hinterlegungsdatum: | 11 Apr 2018 08:19 |
| Letzte Änderung: | 11 Apr 2018 08:19 |
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