Deterioration of the anammox process at decreasing temperatures and long SRTs
The implementation of autotrophic nitrogen removal in the mainstream of a municipal wastewater treatment plant is currently pursued. Among the crucial unknown factors are the kinetic properties of anaerobic ammonium oxidising (anammox) bacteria at low temperatures. In this study we investigated the...
| Veröffentlicht in: | Environmental technology. - 1998. - 39(2018), 5 vom: 11. März, Seite 658-668 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2018
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Anammox low temperature membrane bioreactor nitrogen removal wastewater Ammonium Compounds Waste Water Water Pollutants, Chemical Nitrogen |
| Zusammenfassung: | The implementation of autotrophic nitrogen removal in the mainstream of a municipal wastewater treatment plant is currently pursued. Among the crucial unknown factors are the kinetic properties of anaerobic ammonium oxidising (anammox) bacteria at low temperatures. In this study we investigated the adaptation of a fast-growing anammox culture to a lower temperature. In a membrane bioreactor a highly enriched anammox community was obtained at 30°C, 25°C and 20°C. This culture was exposed to long- and short-term temperature changes. In short-term experiments the decrease in biomass-specific activity due to decrease in temperature can be described by an activation energy of 64 ± 28 kJ mol-1. Prolonged cultivation (months) implies that cultivation at low temperatures resulted in deterioration of biomass-specific activity (EaLT 239 kJ mol-1). The growth rate and specific anammox activity in the system decreased from 0.33 d-1 and 4.47 g NO2-N g VSS-1 d-1 at 30°C to 0.0011 d-1 and 0.037 g NO2-N g VSS-1 d-1 at 20°C. The reason for the deterioration of the system was related to the required long SRT in the system. The long SRT leads to an increase of non-active and non-anammox cells in the reactor, thereby decreasing the biomass-specific activity |
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| Beschreibung: | Date Completed 09.03.2018 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2017.1309078 |