Yindong Tong

Abstract Wastewater treatment, especially nitrogen removal, is a major contributor to global energy consumption and greenhouse gas emissions, driving the need for more sustainable nitrogen removal technologies. However, the practical application of anaerobic ammonium oxidation (anammox) systems is limited by persistent nitrate accumulation, as efficient cross-feeding between anammox bacteria and denitrifiers is hindered by metabolite diffusion and retention challenges.

Abstract The relative retention of nitrogen (N) and phosphorus (P) in lakes and their roles in nutrient cycling remain debated. Although the United States has implemented long-term P control measures in lakes, inexplicable eutrophication exacerbation still reoccurred over the past two decades. Here we geographically track and analyze the nutrient retention changes of 121 lakes in the USA during 2012-2022 using a combination of machine learning and Bayesian hierarchical methods.

Abstract Anthropogenic nutrient discharges drive lake eutrophication and can consequently enhance greenhouse gas (GHG) emissions, amplifying climate change. Managing nutrient levels can substantially reduce GHG emissions from lakes, yet the climate benefits and the cost-effectiveness of managing diverse nutrient sources remain insufficiently quantified.