1. Department of Civil & Environmental Engineering, University of California, Berkeley, CA, USA
2. Center for Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
3. Center for Advanced Process Technology for Urban REsource recovery (CAPTURE), Ghent, Belgium
4. National Science Foundation Engineering Research Center for Re-inventing the Nation's Urban Water Infrastructure, Berkeley, CA, USA