Enhanced biological phosphorus removal (EBPR)
from domestic wastewater in activated sludge plants is
accomplished by alternate stages, where sludge is
subjected to anaerobic and aerobic conditions.
Phosphorus is released from bacterial biomass in
the anaerobic stage and is assimilated by these bacteria
in excess as polyphosphate (poly-P) during the aerobic
stage. Phosphorus is removed from the process stream