I am generally interested in microbial ecology (i.e., how organisms interact with each and with their environment), but I usually study microbial ecology within the context of issues of interest to environmental engineers. My primary expertise is in the area of biological wastewater treatment, where I have focused on developing new biotechnologies for the treatment of municipal and industrial waste streams. My current research focus is on the spread of antibiotic resistant bacteria, although I have on-going research in limnology, microbial fuel cells, and the biodegradation of hazardous pollutants.

1. Linking ecological stoichiometry with bacterial diversity in lakes
2. Antibiotic Resistant Bacteria in the Environment
3. The biodegradation of haloacetic acids in Drinking Water
4. Microbial fuel cells

1. Cultivation-independent community analysis of municipal wastewater treatment bioreactors
2. Ecology of methanotrophic bacteria in wetland sediments
3. Membrane bioreactors for wastewater treatment
4. Thermophilic aerobic biological wastewater treatment