Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rethinking the Mechanisms of Biological Phosphorus Removal
Barnard et al.
Enhanced biological phosphorus removal (EBPR) was observed in high‐rate, non‐nitrifying plants in the United States that were operated in a plug‐flow mode. In facilities designed for nitrification and denitrification, a first‐stage anaerobic zone, free of nitrate and nitrite was needed to accomplish EBPR, and this is referred to as the Phoredox (a.k.a. the AO and A2O) process. When a biological mechanism responsible for EBPR was proposed, these treatment configurations were accepted as normal practice, but many later observations showed that more reliable phosphorus removal could be achieved with alternative configurations. This paper discusses the development of alternative configurations for EBPR and the likelihood that a host of phosphate accumulating organisms (PAOs) that react to different environmental conditions might play a much bigger role in reliable and sustainable biological phosphorus removal. The conclusion is that conventional designs might have inadvertently selected for less efficient PAOs, while alternative configurations allowed for the growth of multiple PAO species such as Tetrasphaera, which can ferment higher carbon forms and take up phosphorus under anoxic conditions.
Rethinking the Mechanisms of Biological Phosphorus Removal
Barnard et al.
Enhanced biological phosphorus removal (EBPR) was observed in high‐rate, non‐nitrifying plants in the United States that were operated in a plug‐flow mode. In facilities designed for nitrification and denitrification, a first‐stage anaerobic zone, free of nitrate and nitrite was needed to accomplish EBPR, and this is referred to as the Phoredox (a.k.a. the AO and A2O) process. When a biological mechanism responsible for EBPR was proposed, these treatment configurations were accepted as normal practice, but many later observations showed that more reliable phosphorus removal could be achieved with alternative configurations. This paper discusses the development of alternative configurations for EBPR and the likelihood that a host of phosphate accumulating organisms (PAOs) that react to different environmental conditions might play a much bigger role in reliable and sustainable biological phosphorus removal. The conclusion is that conventional designs might have inadvertently selected for less efficient PAOs, while alternative configurations allowed for the growth of multiple PAO species such as Tetrasphaera, which can ferment higher carbon forms and take up phosphorus under anoxic conditions.
Rethinking the Mechanisms of Biological Phosphorus Removal
Barnard et al.
Barnard, James L. (Autor:in) / Dunlap, Patrick (Autor:in) / Steichen, Mark (Autor:in)
Water Environment Research ; 89 ; 2043-2054
01.11.2017
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Theoretical Limits to Biological Phosphorus Removal: Rethinking the Influent Cod:N:P Ratio
| British Library Conference Proceedings | 2010
Secondary Phosphorus Release in Biological Phosphorus Removal Systems
| British Library Conference Proceedings | 1998
Enhanced Biological Phosphorus Removal and Recovery
| Wiley | 2008
The beginning of biological phosphorus removal
| Wiley | 2019