RT Journal Article
T1 Understanding the microbial trends in a nitritation reactor fed with primary settled municipal wastewater
A1 Pedrouso Fuentes, Alba
A1 Correa Galeote, David
A1 Maza Márquez, Paula
A1 Juárez Jiménez, Belén
A1 González López, Jesús
A1 Rodelas, Belén
A1 Campos, José Luis
A1 Mosquera Corral, Anuska
A1 Val del Río, Ángeles
K1 Autotrophic nitrogen removal
K1 Free nitrous acid
K1 Low temperature
K1 Mainstream
K1 Nitrite oxidation inhibition
AB Partial nitritation was pointed out as the key step to implement the autotrophic nitrogen+ removal processes at low temperature. This study investigated the initiation and maintenance of a nitritation process with simultaneous COD removal in a sequencing batch reactor (SBR) run at 15 ◦C and fed with primary settled urban wastewater characterized by 42 ± 10 mg TOC/L and 45 ± 4 mg NH4+-N/L. A nitrite accumulation ratio of nearly100% was observed and the long-term (354 days) process stability was successfully maintained despite the municipal wastewater composition fluctuations. The absence of nitrite oxidizing bacteria (NOB) activity was attributed to the free nitrous acid (FNA) in-situ accumulated at high levels (0.02–0.20 mg HNO2-N/L). Despitenitrate production was not observed, the quantification of bacterial groups indicated that NOB were present in the SBR sludge throughout the entire operational period. Ammonium oxidizing bacteria (AOB) abundance and community structure were significantly influenced by the organic matter present in the feeding. Average organic matter removal efficiencies of 80% were obtained without observing any detrimental effect over the nitritation process performance, due to the functional redundancy within both the chemoheterotrophic and AOB communities
PB Elsevier
YR 2020
FD 2020
LK http://hdl.handle.net/10347/29328
UL http://hdl.handle.net/10347/29328
LA eng
NO Pedrouso, A.; Correa-Galeote, D.; Maza-Márquez, P.; Juárez-Jiménez, B.; González- López, J.; Rodelas, B.; Val del Rio, A. (2021). Understanding the microbial trends in a nitritation reactor fed with primary settled municipal wastewater. Separation and Purification Technology, 256, 117828. https://doi.org/10.1016/j.seppur.2020.117828
NO This work was funded by Pioneer_STP (PCIN-2015-022 MINECO (AEI)/ID 199 (UE)) project funded by the WaterWorks2014 Cofunded Call (Water JPI/Horizon 2020) and by the Spanish Government (AEI) through TREASURE (CTQ2017-83225-C2-1-R) project. Authors from the USC belong to CRETUS Strategic Partnership (ED431E 2018/01) and to the Galician Competitive Research Group (GRC ED431C 2017/29). All these programs are co-funded by FEDER (UE)
DS Minerva
RD 24 abr 2026