Arief Rahman, Mulyadi Abdul Wahid, & Sapriyadi. (2025). COD REMOVAL PERFORMANCE USING COMBINATION OF SPENT COFFEE GROUNDS ACTIVATED CARBON AND RIVER SAND AS FILTRATION MEDIA IN TOFU INDUSTRIAL WASTEWATER. Indonesian Journal of Environmental Sustainability, 3(1), 26–31. https://doi.org/10.22373/ijes.v3i1.7663