Ayuningtyas, R. M., & Fadilah, M. R. K. (2024). 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, 1(2), 99–110. https://doi.org/10.61511/jmarpt.v1i2.2024.2023