TY - JOUR
T1 - Robustness of sludge enriched with short SBR cycles for biological nutrient removal
AU - Freitas, Filomena
AU - Temudo, Margarida F.
AU - Carvalho, Gilda
AU - Oehmen, Adrian Michael
AU - Reis, Maria D'ascensão Carvalho Fernandes Miranda
N1 - Sem PDF.
PY - 2009/3
Y1 - 2009/3
N2 - In this study, it is proposed that short sequencing batch reactor (SBR) cycles select and maintain a robust and active biomass, able to cope with typical disturbances occurring in wastewater treatment plants. In order to test this hypothesis, an SBR system was subjected to COD, N and P shock loads. It was shown that the sludge enriched in the SBR operated with short cycles was able to rapidly recover from the tested disturbances. COD and N removal recovered within 1-2 days for shock loads of 10 times the standard concentration. The P removal took up to 2-3 sludge ages to fully recover from the COD spike, but the enhanced biological phosphorus removal (EBPR) performance was still able to be totally re-established after each of the tests, even in theoretically adverse conditions for the growth of polyphosphate accumulating organisms.
AB - In this study, it is proposed that short sequencing batch reactor (SBR) cycles select and maintain a robust and active biomass, able to cope with typical disturbances occurring in wastewater treatment plants. In order to test this hypothesis, an SBR system was subjected to COD, N and P shock loads. It was shown that the sludge enriched in the SBR operated with short cycles was able to rapidly recover from the tested disturbances. COD and N removal recovered within 1-2 days for shock loads of 10 times the standard concentration. The P removal took up to 2-3 sludge ages to fully recover from the COD spike, but the enhanced biological phosphorus removal (EBPR) performance was still able to be totally re-established after each of the tests, even in theoretically adverse conditions for the growth of polyphosphate accumulating organisms.
KW - SEQUENCING BATCH REACTOR
KW - STRATEGY
KW - TEMPERATURE
KW - WASTE-WATER
KW - PHOSPHORUS REMOVAL
KW - SIMULTANEOUS NITROGEN
KW - GLYCOGEN-ACCUMULATING ORGANISMS
KW - DENITRIFICATION
KW - PHOSPHATE REMOVAL
KW - PERFORMANCE
KW - Enhanced biological phosphorus removal (EBPR)
KW - Glycogen accumulating organisms (GAO)
KW - Nitrogen removal
KW - Polyphosphate accumulating organisms (PAO)
KW - Temperature
U2 - 10.1016/j.biortech.2008.10.031
DO - 10.1016/j.biortech.2008.10.031
M3 - Article
C2 - 19056261
SN - 0960-8524
VL - 100
SP - 1969
EP - 1976
JO - Bioresource Technology
JF - Bioresource Technology
IS - 6
ER -