IsoMol
IsoMol: Advanced understanding of autotrophic nitrogen removal and associated N2O emissions in mixed nitritation-anammox systems through combined stable ISOtopic and MOLecular constraints
Autotrophic nitrogen removal by anaerobic ammonium oxidation (anammox) is an important mechanism of fixed N elimination, both in engineered and natural systems. In wastewater treatment plants, it may permit operation under energy autarky and with a better carbon footprint. The SNSF Sinergia funded project “IsoMol” seeks to understand the functioning of mixed microbial populations featuring alternative biogeochemical pathways and to characterize its dependence on environmental conditions and microbial composition.
Experimental setup established at Empa for simultaneous, semi-continuous analysis of 15N in nitrate, nitrite and ammonium in wastewater.
Related publications
Hausherr, D.; Niederdorfer, R.; Bürgmann, H.; Lehmann, M. F.; Magyar, P.; Mohn, J.; Morgenroth, E.; Joss, A. Successful mainstream nitritation through NOB inactivation. Sci. Total Environ. 2022, 822, 153546 (11 pp.). https://doi.org/10.1016/j.scitotenv.2022.153546
Hausherr, D.; Niederdorfer, R.; Bürgmann, H.; Lehmann, M. F.; Magyar, P.; Mohn, J.; Morgenroth, E.; Joss, A. Successful year-round mainstream partial nitritation anammox: assessment of effluent quality, performance and N2O emissions. Water Res. X 2022, 16, 100145 (11 pp.). https://doi.org/10.1016/j.wroa.2022.100145
Magyar, P. M.; Hausherr, D.; Niederdorfer, R.; Stöcklin, N.; Wei, J.; Mohn, J.; Bürgmann, H.; Joss, A.; Lehmann, M. F. Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems. Sci. Rep. 2021, 11 (1), 7850 (12 pp.). https://doi.org/10.1038/s41598-021-87184-0
Wei, J.; Ibraim, E.; Brüggemann, N.; Vereecken, H.; Mohn, J. First real-time isotopic characterisation of N2O from chemodenitrification. Geochim. Cosmochim. Acta 2019, 267, 17-32. https://doi.org/10.1016/j.gca.2019.09.018