Candidatus

Candidatus

Candidatus is in scientific classification a component of the taxonomic name for a bacterium that cannot be maintained in a Bacteriology Culture Collection. It is an interim taxonomic status for noncultivable organisms. An example would be "Candidatus Phytoplasma allocasuarinae"...

 Accumulibacter is an unclassified group of Betaproteobacteria

Betaproteobacteria

Betaproteobacteria is a class of Proteobacteria. Betaproteobacteria are, like all Proteobacteria, gram-negative.The Betaproteobacteria consist of several groups of aerobic or facultative bacteria which are often highly versatile in their degradation capacities, but also contain chemolithotrophic...

 that currently contains only a single member, Candidatus Accumulibacter Phosphatis

Candidatus Accumulibacter phosphatis

Candidatus Accumulibacter phosphatis is an unclassified Betaproteobacteria that is a common bacterial community member of wastewater treatment plants performing Enhanced biological phosphorus removal and is a Polyphosphate-accumulating organisms...

. C. Accumulibacter phosphatis is a common bacterial community member of wastewater treatment plants performing enhanced biological phosphorus removal

Enhanced biological phosphorus removal

Enhanced biological phosphorus removal is a wastewater treatment configuration applied to activated sludge systems for the removal of phosphate....

 and is a polyphosphate-accumulating organisms. There are currently no cultured representatives, however due to the importance of C. Accumulibacter phosphatis in the biotechnology industry these has been much research into the physiology of these bacteria.