Ayuningtyas, Rahayu Murti, and M. Rizki Khoerul Fadilah. “Optimization of the Use of Shellfish Waste As a Coagulant Material for Liquid Waste from the Paper Industry in Waste Processing Using the Knorr Method ”. Journal of Marine Problems and Threats, vol. 1, no. 2, Aug. 2024, pp. 99-110, doi:10.61511/jmarpt.v1i2.2024.2023.