Critical Role of Aerobic Uptake in Biological Phosphorus Removal

High-Level Biological Phosphorus Removal Failure and Recovery

“…Previous work (Drury et al, 2005) had indicated that higher DOs (greater than 3 mg/L) in the initial aerobic zones would improve BPR stability and performance. The effects of DO are discussed in another paper (Narayanan et al, 2006). This paper is focused on the other methods that were used to improve BPR reliability during this testing period.…”

Hydrodynamic optimization of multi-environment reactors for biological nutrient removal: A methodology combining computational fluid dynamics and dimensionless indexes

“…These indexes help to evaluate the hydrodynamic performance of a water treatment unit quantifying key features such as mixing, shortcircuiting or dead volumes. Plug flow conditions are usually pursued as they guarantee more rapid substrate uptake kinetics than in completely mixed conditions (Stensel, 1991;Jeyanayagam, 2007;Narayanan et al 2006;Water Environment Federation, 2011).…”

From Total Suspended Solids to Molecular Biology Tools—A Personal View of Biological Wastewater Treatment Process Population Dynamics

“…It is necessary to reduce the dissolved phosphate concentration to low values as early as possible in the aerobic zone, so that the high-affinity transporter can operate over as much of the aerobic zone as possible. Narayanan et al (2006) found that it was possible to consistently achieve dissolved orthophosphate concentrations of less than 0.1 mg/L, by staging the aerobic zone and by making conditions favorable for rapid dissolved orthophosphate uptake (adequate dissolved oxygen) in the first stage.…”