RT Journal Article
T1 Operating strategies to optimize a membrane bioreactor enriched in nitrite-dependent anaerobic methane-oxidizing bacteria
A1 Arias Baño, Adrián
A1 Allegue Martínez, Tomás Francisco
A1 Darwich, Alaa
A1 Fachal, Manuel
A1 Martínez Quintela, Miguel
A1 Omil Prieto, Francisco
A1 Garrido Fernández, Juan Manuel
K1 Anaerobic methane oxidation
K1 N-damo bacteria
K1 Nitrogen removal
K1 Trace elements
K1 Macronutrients
K1 MBR
AB The use of N-damo bacteria, which can simultaneously remove nitrite and dissolved methane, could represent a cost-effective and sustainable alternative to minimize the environmental impact of effluents from methanogenic reactors treating domestic sewage. The operation of N-damo bacteria reactors is often not stable, and their activity decrease with no proven reason over time. This study aims to optimize the nitrite removal capacity of a lab-scale MBR by using different operating strategies for 878 days. The reactor was operated in continuous mode and with biomass highly enriched in these microbes. It was found that adjustments in the mineral medium concentration (reduction of Ca, P, and K) and composition (EDTA addition, increasing the Cu and Fe bioavailability), contributed to achieving remarkable and prolonged nitrite removal rates of up to 285.7 mg NO2–-N/L/d. N-damo bacteria dominated the culture, up to 57 %. To the best of our knowledge, the rates attained are the highest reported in an N-damo bacteria enrichment
PB Elsevier
YR 2022
FD 2022
LK http://hdl.handle.net/10347/29173
UL http://hdl.handle.net/10347/29173
LA eng
NO Chemical Engineering Journal  450 (2022) 138289
NO The authors acknowledge the financial support received from the Spanish Ministry of Science and Innovation through the project ANTARES (PID2019-110346RB-C21), co-funded by FEDER. T. Allegue would also like to express his gratitude to the same Ministry for awarding a research scholarship (BES-2014-069114). The authors belong to the Galician Competitive Research Groups (GRC) ED431C-2021/37, a program co-funded by FEDER
DS Minerva
RD 24 abr 2026