1. Civil and Environmental Engineering Department, Northeastern University, Boston, Massachusetts 02115, United States
2. School of Engineering, Institute for Bioengineering, The University of Edinburgh, Edinburgh, U.K.
3. Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
4. School of Civil and Environmental Engineering, Cornell University, Ithaca, New York 14853, United States