RT Journal Article
T1 Microalgae-bacterial biomass outperforms PN-anammox biomass for oxygen saving in continuous-flow granular reactors facing extremely low-strength freshwater aquaculture streams
A1 Val del Río, Ángeles
A1 Amorim, Catarina L.
A1 Couto, Ana T.
A1 Arregui Maraver, Luz
A1 Castro, Paula M. L.
A1 Mosquera Corral, Anuska
A1 Santorio Aldariz, Sergio
K1 Aquaculture effluents
K1 Continuous-flow reactors
K1 Extremely low-strength wastewater
K1 Water recycling
K1 Granular sludge
K1 Microalgae-bacteria consortium
K1 PN-Anammox
AB The dissolved oxygen (DO) concentration in water streams is one of the most important and critical quality parameters in aquaculture farms. The main objective of this study was to evaluate the potential of two Continuous Flow Granular Reactors, one based on Partial Nitrification-Anammox biomass (Aquammox CFGR) and the other on Microalgae-Bacteria biomass (AquaMab CFGR), for improving dissolved oxygen availability in the recirculation aquaculture systems (RAS). Both reactors treated the extremely low-strength effluents from a freshwater trout farm (1.39 mg NH4+-N/L and 7.7 mg TOC/L). The Aquammox CFGR, removed up to 68% and 100% of ammonium and nitrite, respectively, but the DO concentration in the effluent was below 1 mg O2/L while the anammox activity was not maintained. In the AquaMab CFGR, bioaugmentation of aerobic granules with microalgae was attained, producing an effluent with DO concentrations up to 9 mg O2/L and removed up to 77% and 80% of ammonium and nitrite, respectively, which is expected to reduce the aeration costs in fish farms
PB Elsevier
YR 2022
FD 2022
LK http://hdl.handle.net/10347/29450
UL http://hdl.handle.net/10347/29450
LA eng
NO Chemosphere 308 (2022) 136184
NO The authors would like to thank the EU, the Spanish Government (AEI) (PCIN-2017-047) and Fundação para a Ciência e Tecnologia (FCT) (Water JPI/0003/2016) for funding, in the frame of the collaborative international Consortium AQUAVAL financed under the ERA-NET WaterWorks2015 Cofunded Call. This ERA-NET is an integral part of the 2016 Joint Activities developed by the Water Challenges for a Changing World Joint Programme Initiative (Water JPI) and the CDTI (Centro para Desarrollo Tecnológico Industrial, E.P.E., Spain). Authors also thank the Spanish Government (AEI) for funding in the frame of the project TREASURE (CTQ 2017-83225-C2-1-R) and the FCT for funding in the frame of the project UIDB/50016/2020. S. Santorio, A. Val del Rio and A. Mosquera-Corral belong to the Galician Competitive Research Groups (GRC)_ED431C-2021/37 co-funded by FEDER (EU)
DS Minerva
RD 24 abr 2026