Biological and Chemical Phosphorus Elimination

Bacterial Metabolism in Wastewater Treatment Systems

“…If no presedimentation of sludge is available or the sedimentation efficiency is low, no ferrous ions have to be added (van Loosdrecht et al, 1997b). A detailed descrip-tion of the state of the art concerning biological phosphate elimination was given by Schön (1999).…”

Biological nutrient removal in bench-scale membrane bioreactor and full-scale sequencing batch reactor under various configurations and conditions

“…For conventional activated sludge processes, phosphorus contents are observed in the range of 1 -2% of the total solids (TS) whereas enhanced biological phosphorus removal (EBPR) mixed liquor contains generally more than 2% phosphorus of the TS and can reach values of 5% phosphorus of the TS (Schôn and Jardin, 2001). Although we have a fairly good understanding of EBPR for the conventional activated sludge process, EBPR for MBR has not been optimized due to the fact that MBR are operated at long SRTs, high suspended solids concentrations, and short HRTs.…”