Parameswaran’s research interests pertain to the capture and reuse of energy and resources at the waste-energy-water nexus. His research focus to achieve this goal includes: anaerobic digestion, pretreatment technologies for bioprocessing of wastes and biomass, microbial electrochemical cells for valuable products generation (electric power, hydrogen gas and advanced oxidation products such as hydrogen peroxide), downstream resource capture from photosynthetic microalgae through novel environmental biotechnology for a sustainable and green biorefinery.