I. Syaichurrozi, J. Jayanudin, L. N. Sari, and A. P. Apriantika, “Effect of Alum Dose in the Coagulation Process for Decreasing the Pollutant in the Palm Oil Mill Effluent: Experimental and Kinetic Analysis”, Eksergi, vol. 19, no. 3, pp. 91–96, Nov. 2022.