Effectiveness Of Activated Nipah Bark Charcoal In Reducing Free Fatty Acids And Peroxide Numbers In Waste-Cooked Oil. SINTA Journal (Science, Technology, and Agricultural), [S. l.], v. 7, n. 1, p. 189–200, 2026. DOI: 10.37638/sinta.7.1.189–200. Disponível em: http://journal.pdmbengkulu.org/index.php/sinta/article/view/1898. Acesso em: 15 aug. 2026.