1. Department of Biological and Environmental Engineering, Riley Robb Hall, Cornell University, Ithaca, New York 14853, USA
2. Cornell Energy Systems Institute, Cornell University, Ithaca, New York 14853, USA
3. Cornell Facilities Engineering, 201 Humphreys Service Building, Cornell University, Ithaca, New York 14853, USA
4. Electrochaea GmbH, Semmelweisstraße 3, 82152 Planegg, Germany
5. Centrum for Applied Geosciences, University of Tübingen, Schnarrenbergstraße 94-96, 72076 Tübingen, Germany
6. School of Chemical and Biomolecular Engineering, Olin Hall, Cornell University, Ithaca, New York 14853, USA