E-Andrew Sindt Creative Component S11.pdf

Figure 2.7- Phoredox process (Rittman and McCarty, 2001)2.2.2.2 Bardenpho ProcessA similar modification can be made to the Barnard process as shown in Figure 2.8. With the addition ofan anaerobic tank to the front of the process, and a recycle line to bring mixed liquor back to it, thebiomass will experience alternating anaerobic and aerobic environments.Figure 2.8-Bardenpho process (Rittman and McCarty, 2001)2.2.2.3 EBPR in SBRsEBPR in SBRs is achieved with the additions of an anaerobic step followed by an aerobic step to the SBRcycle. Furthermore, in order for PAOs to compete favorably, it is important for substrate to be availablein the reactor during the anaerobic period (Manning and Irvine, 1985). As shown in Figure 2.9, substrateis consumed by the biomass under anaerobic conditions and phosphorus uptake occurs during thefollowing aerobic conditions while PHA is consumed. A summary of relevant research on nutrientremoval in SBR process is presented in the following section.21