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Arief Rahman, Mulyadi Abdul Wahid, Sapriyadi. COD REMOVAL PERFORMANCE USING COMBINATION OF SPENT COFFEE GROUNDS ACTIVATED CARBON AND RIVER SAND AS FILTRATION MEDIA IN TOFU INDUSTRIAL WASTEWATER. IJES [Internet]. 2025 Jun. 30 [cited 2025 Jul. 6];3(1):26-31. Available from: https://journal.ar-raniry.ac.id/IJES/article/view/7663