“OPTIMIZING PALM OIL MILL EFFLUENT (POME) DECOLOURISATION: ENHANCED EFFICIENCY WITH TREATED COAL BOTTOM ASH”, ijps, vol. 4, no. 01, pp. 07–11, Jan. 2024, Accessed: Jan. 19, 2026. [Online]. Available: https://www.academicpublishers.org/journals/index.php/ijps/article/view/231