The PM 2 was able to match the decreasing trends of ammonium and orthophosphate concentrations due to microalgal nutrient uptake, with RMSESNH of 1.86 g-N•m -3 and RMSESP of 0.01 g-P•m -3 , respectively (Figure ). The EcoRecover process was intentionally designed to be phosphorus-limited and relatively rich in nitrogen to meet stringent phosphorus effluent permit requirements. The influent ammonium and orthophosphate concentrations to the EcoRecover system at the Roberts Wastewater Treatment Plant from March 12, 2022 through April 25, 2022 ranged from 18.22 to 45.97 g-N•m -3 and 0.00 to 0.62 g-P•m -3 , respectively. Similar to full-scale performance, rapid phosphorus uptake and depletion was also observed in the benchscale batch experiment because the inoculum and substrate were taken directly from the fullscale PBR.