1 Ralph M. Parsons Laboratory for Environmental Science and Engineering, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
2 Institute for Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland.
3 Center of Microbiology and Environmental Systems Science, Division of Microbial Ecology, University of Vienna, Vienna, Austria.
4 School of Engineering, Institute for Bioengineering, The University of Edinburgh, Edinburgh, UK.
5 The Comammox Research Platform, University of Vienna, Vienna, Austria.
6 Ralph M. Parsons Laboratory for Environmental Science and Engineering, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. [email protected].
7 Institute for Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland. [email protected].