Daigger’s research has focused on the fundamental science and engineering supporting the advancement of technologies and practices which have been transformational for environmental engineering. These have included topics such as wastewater nutrient removal and recovery (biological and chemical), treatment process optimization and control (particularly biological treatment systems), control of activated sludge bulking and foaming, which can be debilitating and lead to excessive treatment costs if not properly addressed, and the highly efficient coupled attached and suspended growth systems.
- Belmont Forum Collaborative Research: The Moveable Nexus: Design-led urban food, water and energy management innovation in new boundary conditions of change
- FEW Workshop: "Scaling Up" Urban Agriculture to Mitigate Food-Energy-Water Impacts
- M-CUBED 2.0: Uncovering the Food-Energy-Water Nexus for Urban Sustainability
- Life Cycle Assessment of Urine Diversion Wastewater Treatment: Results and Software Tool
- Quantifying the Urban Food-Energy-Water (FEW) Nexus: The Case of the Detroit Metropolitan Area
- Quantifying the Urban Food–Energy–Water Nexus: The Case of the Detroit Metropolitan Area
- Scaling Up Agriculture in City-Regions to Mitigate FEW System Impacts