THE EFFECT OF MASS AND PH ON DECREASING CHEMIXAL OXYGENT DEMAND (COD) ON PALM OIL MILL EFFLUENT (POME) BY CACAO SHELL ADSORBENT. Stannum [Internet]. 2025 Nov. 4 [cited 2026 Aug. 4];7(2):54-9. Available from: https://www.journal.ubb.ac.id/index.php/stannum/article/view/3781