Filamentous members of cluster III Defluviicoccus have the in situ phenotype expected of a glycogen‐accumulating organism in activated sludge

摘要: The in situ ecophysiology of alphaproteobacterial filamentous Cluster III Defluviicoccus present enhanced biological phosphorus removal (EBPR)-activated sludge systems was evaluated using FISH-MAR and histochemical staining methods. These organisms, sharing the Nostocoida limicola morphotype, are known to be responsible for serious episodes activated bulking. data presented here also demonstrate an ability assimilate short-chain fatty acids synthesize poly-β-hydroxyalkanoates (PHA) anaerobically, then utilize this stored PHA under aerobic conditions, but with no corresponding synthesis polyphosphate. features consistent phenotype glycogen-accumulating organisms (GAO), populations thought lower efficiency EBPR by outcompeting polyphosphate-accumulating (PAO) substrates their anaerobic feed phase. Survey indicate that these GAO as commonly seen PAO full-scale EBPR-activated systems, which suggest they might play important roles there, therefore should not viewed just laboratory curiosities.