TY - JOUR
T1 - Effects of the cycle distribution on the performance of SBRs with aerobic granular biomass
AU - Val Del Río, A.
AU - Morales, N.
AU - Figueroa, M.
AU - Mosquera-Corral, A.
AU - Campos, J. L.
AU - Méndez, R.
N1 - Funding Information:
This work was supported by the Spanish Government (NOVEDAR_Consolider CSD 2007-00055; PLASTICWATER -CTQ2011-22675; FPU AP2006-01478) and Xunta de Galicia (10MDS265003PR). The authors belong to the Galician Competitive Research Group GRC2010/37. The authors also want to thank Mónica Dosil, Mar Orge and Miriam Vieites for their support in the analytical techniques.
PY - 2013/6/1
Y1 - 2013/6/1
N2 - The aerobic granular systems are mainly sequencing batch reactors where the biomass is submitted to feast-famine regimes to promote its aggregation in the form of granules. In these systems, different cycle distributions can be applied for the simultaneous removal of organic matter, nitrogen and phosphorus. In this work two strategies were followed in order to evaluate the effects of the cycle distribution. In the first experiment, the length of the operational cycle was decreased in order to maximize the treatment capacity and consequently the famine/feast ratio was also decreased. In the second experiment, an initial anoxic phase was implemented to improve nitrogen removal efficiency. The results obtained showed that to reduce the famine/feast ratio from 10 to 5 was possible by increasing the treated organic and nitrogen loading rates in the system to 33%, without affecting the removal efficiencies of organic matter (97%) and nitrogen (64%) and producing a slight detriment of the granules characteristics. On the other hand, the implementation of an anoxic phase of 30 min previous to the aerobic one with a pulse-fed mode increased the nitrogen removal of pig manure from 20 to 60%, while the cycle configuration comprising a continuous feeding simultaneous with an anoxic phase of 60 min did not enhance the nitrogen removal and even worsen the ammonia oxidation.
AB - The aerobic granular systems are mainly sequencing batch reactors where the biomass is submitted to feast-famine regimes to promote its aggregation in the form of granules. In these systems, different cycle distributions can be applied for the simultaneous removal of organic matter, nitrogen and phosphorus. In this work two strategies were followed in order to evaluate the effects of the cycle distribution. In the first experiment, the length of the operational cycle was decreased in order to maximize the treatment capacity and consequently the famine/feast ratio was also decreased. In the second experiment, an initial anoxic phase was implemented to improve nitrogen removal efficiency. The results obtained showed that to reduce the famine/feast ratio from 10 to 5 was possible by increasing the treated organic and nitrogen loading rates in the system to 33%, without affecting the removal efficiencies of organic matter (97%) and nitrogen (64%) and producing a slight detriment of the granules characteristics. On the other hand, the implementation of an anoxic phase of 30 min previous to the aerobic one with a pulse-fed mode increased the nitrogen removal of pig manure from 20 to 60%, while the cycle configuration comprising a continuous feeding simultaneous with an anoxic phase of 60 min did not enhance the nitrogen removal and even worsen the ammonia oxidation.
KW - aerobic granulation
KW - feast-famine period
KW - nitrification-denitrification
KW - pig manure
KW - sequencing batch reactor
UR - http://www.scopus.com/inward/record.url?scp=84879696674&partnerID=8YFLogxK
U2 - 10.1080/09593330.2012.753470
DO - 10.1080/09593330.2012.753470
M3 - Article
C2 - 24191480
AN - SCOPUS:84879696674
SN - 0959-3330
VL - 34
SP - 1463
EP - 1472
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 11
ER -