Merab (Mellanskånes Renhållnings AB) operates a waste management and recycling center at Rönneholms Mosse. The facility also includes three landfills—two closed and one active. When it rains or snows over the landfill areas, the water carries pollutants, organic matter, and nutrients such as nitrogen. If released untreated into natural water systems, this can harm the environment or lead to eutrophication. To prevent this, the water is treated in various leachate ponds. In one of these ponds, Merab sought to optimize the separation of nitrogen and organic matter while improving the pond’s hydraulics.