Integrated Omic Analyses Provide Evidence that a “ Candidatus Accumulibacter phosphatis” Strain Performs Denitrification under Microaerobic Conditions

Camejo et al. (2019). mSystems 4 (1)
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Biochemistry Computer Science Applications Ecology, Evolution, Behavior and Systematics Genetics Microbiology Modelling and Simulation Molecular Biology Physiology
“ Candidatus Accumulibacter phosphatis” is widely found in full-scale wastewater treatment plants, where it has been identified as the key organism for biological removal of phosphorus. Since aeration can account for 50% of the energy use during wastewater treatment, microaerobic conditions for wastewater treatment have emerged as a cost-effective alternative to conventional biological nutrient removal processes. Our report provides strong genomics-based evidence not only that “ Ca . Accumulibacter phosphatis” is the main organism contributing to phosphorus removal under microaerobic conditions but also that this organism simultaneously respires nitrate and oxygen in this environment, consequently removing nitrogen and phosphorus from the wastewater. Such activity could be harnessed in innovative designs for cost-effective and energy-efficient optimization of wastewater treatment systems.
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