Dr. Craig L. Just is a Professor of Civil and Environmental Engineering at the University of Iowa, where his research integrates environmental biotechnology, analytical chemistry, artificial intelligence, and process systems engineering to advance sustainable water and resource recovery. His work focuses on developing intelligent monitoring and decision-support tools for biological treatment processes, with particular emphasis on anaerobic digestion, co-digestion, nutrient removal, and wastewater lagoon intensification. Dr. Just leads interdisciplinary research on the application of machine learning, diffuse reflectance spectroscopy, and deployable sensor technologies to provide real-time insight into biological treatment performance. His group develops predictive models and digital tools that enable wastewater utilities, agricultural producers, and renewable energy facilities to optimize operations, improve process resilience, and maximize resource recovery. Current projects include AI-enabled monitoring of anaerobic digesters, rapid characterization of organic wastes, methane emissions from wastewater treatment systems, algal-based nutrient recovery, and innovative technologies for ammonia removal in municipal lagoons.