A GAO hiding among the PAO: The role of the Propionivibrio spp. in biological phosphorus removal

Publikation: Forskning - peer reviewPoster

Abstrakt

Enhanced biological phosphorus removal (EBPR) is widely used to remove phosphorus from wastewater. The process relies on polyphosphate accumulating organisms (PAOs) that are able to take up phosphorus in excess of what is needed for growth, whereby phosphorus can be removed from the wastewater by wasting the biomass. However, glycogen accumulating organisms (GAOs) may reduce the EBPR efficiency as they compete for substrates with PAOs, but do not store excessive amounts of polyphosphate. PAOs and GAOs are thought to be phylogenetically unrelated, with the model PAO being the betaproteobacterial “Candidatus Accumulibacter phosphatis” (Accumulibacter) and the model GAO being the gammaproteobacterial “Candidatus Competibacter phosphatis” (see Oehmen et al., 2007). Here, we report the discovery of a GAO from the genus Propionivibrio, which is closely related to Accumulibacter. Propionivibrio is often found in similar abundance to Accumulibacter in full-scale plants and has, until now, been mistakenly quantified as Accumulibacter using the canonical PAOmix FISH probes.
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Detaljer

Enhanced biological phosphorus removal (EBPR) is widely used to remove phosphorus from wastewater. The process relies on polyphosphate accumulating organisms (PAOs) that are able to take up phosphorus in excess of what is needed for growth, whereby phosphorus can be removed from the wastewater by wasting the biomass. However, glycogen accumulating organisms (GAOs) may reduce the EBPR efficiency as they compete for substrates with PAOs, but do not store excessive amounts of polyphosphate. PAOs and GAOs are thought to be phylogenetically unrelated, with the model PAO being the betaproteobacterial “Candidatus Accumulibacter phosphatis” (Accumulibacter) and the model GAO being the gammaproteobacterial “Candidatus Competibacter phosphatis” (see Oehmen et al., 2007). Here, we report the discovery of a GAO from the genus Propionivibrio, which is closely related to Accumulibacter. Propionivibrio is often found in similar abundance to Accumulibacter in full-scale plants and has, until now, been mistakenly quantified as Accumulibacter using the canonical PAOmix FISH probes.
OriginalsprogEngelsk
Publikationsdato5 sep. 2016
StatusUdgivet - 5 sep. 2016
Begivenhed - Copenhagen, Danmark

Konference

KonferenceMicrobial Ecology & Water Engineering and Biofilm IWA Specialist Conference
LokationRadisson Falkoner
LandDanmark
ByCopenhagen
Periode04/09/201607/09/2016
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