The amount of carbon stored by fermentative organisms has potentially important implications for phosphorus removal – as they compete for substrates with the Tetrasphaera PAO and stored carbon is not made available to the “ Candidatus Accumulibacter” PAO under anaerobic conditions. This physiology is markedly different from the classical GAO model. Fermentation was not directly demonstrated for the abundant members of the genus in situ, but was strongly supported by the confirmation of anaerobic uptake of carbon and glycogen storage in the absence of detectable polyhydroxyalkanoates or polyphosphate reserves. were observed to take up carbon, including sugars and amino acids, under anaerobic conditions, which were partly fermented to lactic acid, acetate, propionate, and ethanol, and partly stored as glycogen for potential aerobic use. Lg2 T and compared to the in situ physiology of members of the genus in EBPR plants using state-of-the-art single cell techniques. In the current study, genomic and metabolomic studies were performed on Micropruina glycogenica str. are among the most abundant of the proposed GAO, yet little is known about their ecophysiology. In full-scale systems the Micropruina spp. The most studied are the glycogen accumulating organisms (GAOs), which utilize aerobically stored glycogen to energize anaerobic substrate uptake and storage. However, several alternate metabolic strategies, without polyphosphate storage, are possessed by other organisms, which can compete with the PAO for carbon at the potential expense of EBPR efficiency. 2School of Agriculture, Food, and Wine, The University of Adelaide, Adelaide, SA, AustraliaĮnhanced biological phosphorus removal (EBPR) involves the cycling of biomass through carbon-rich (feast) and carbon-deficient (famine) conditions, promoting the activity of polyphosphate accumulating organisms (PAOs).1Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark. Grbin 2 Reinhard Wimmer 1 Per Halkjær Nielsen 1* Onetto 2 Bianca McIlroy 1 Florian-Alexander Herbst 1 Morten S.
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