TY - JOUR
T1 - Kinetics and stoichiometry in the biological phosphorus removal process with short cycle times
AU - Kuba, T.
AU - Van Loosdrecht, M. C.M.
AU - Murnleitner, E.
AU - Heijnen, J. J.
N1 - Funding Information:
Acknowledgements--This research was financially supported in part by the Netherlands Agency for the Environment and Energy (NOVEM, 351230/1110), the Foundation for Water Research (STOWA), and the Institute for Inland Water Management and Waste Water Treatment (RIZA), within the framework of the programme Future Treatment Techniques for Municipal Waste Water (RWZI 2000-3234/5). Sincere thanks go to S. van Hateren, C. Ras, D. Reuvers, G. van der Steen and M. Zomerdijk for analyses of the samples, and to P. Kroon and S. Lispet for technical assistance in the experimental set-up,
PY - 1997/4
Y1 - 1997/4
N2 - Aerobic or denitrifying biological phosphorus removal in a sequencing batch rector (SBR) with short repetitive anaerobic-aerobic (A/O) or anaerobic-anoxic (A2) cycling has been studied. These conditions resemble processes with large internal recycle flows. Under these conditions the fatty acid dosage per anaerobic phase is low compared to a conventional SBR or plug flow process. It was shown that at the same sludge retention time (SRT) the average poly-β-hydroxybutyrate (PHB) content of the biomass decreased, with increasing the number of A/O or A2 cycles. This had no direct effect on the biological phosphorus removal. In the A2 SBR, however, phosphorus removal was deteriorating due to transfer of nitrate to the anaerobic phase. Most mathematical models for biological phosphorus removal processes show a relation between the biomass growth rate and the PHB content. This research shows that such a unique relation does not exist, since at one SRT different `steady state' PHB levels could be obtained, depending on the cycle number and the use of oxygen or nitrate as an electron acceptor. This indicates the need for an alternative kinetic model.
AB - Aerobic or denitrifying biological phosphorus removal in a sequencing batch rector (SBR) with short repetitive anaerobic-aerobic (A/O) or anaerobic-anoxic (A2) cycling has been studied. These conditions resemble processes with large internal recycle flows. Under these conditions the fatty acid dosage per anaerobic phase is low compared to a conventional SBR or plug flow process. It was shown that at the same sludge retention time (SRT) the average poly-β-hydroxybutyrate (PHB) content of the biomass decreased, with increasing the number of A/O or A2 cycles. This had no direct effect on the biological phosphorus removal. In the A2 SBR, however, phosphorus removal was deteriorating due to transfer of nitrate to the anaerobic phase. Most mathematical models for biological phosphorus removal processes show a relation between the biomass growth rate and the PHB content. This research shows that such a unique relation does not exist, since at one SRT different `steady state' PHB levels could be obtained, depending on the cycle number and the use of oxygen or nitrate as an electron acceptor. This indicates the need for an alternative kinetic model.
UR - https://www.scopus.com/pages/publications/0031128031
UR - https://www.scopus.com/pages/publications/0031128031#tab=citedBy
U2 - 10.1016/S0043-1354(96)00371-5
DO - 10.1016/S0043-1354(96)00371-5
M3 - Article
AN - SCOPUS:0031128031
SN - 0043-1354
VL - 31
SP - 918
EP - 928
JO - Water Research
JF - Water Research
IS - 4
ER -