1. Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA
2. Carollo Engineers, Inc., Broomfield, Colorado, USA
3. Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
4. Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, Wisconsin, USA
5. Carollo Engineers, Inc., San Diego, California, USA
6. Madison Metropolitan Sewerage District, Madison, Wisconsin, USA
7. Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA