M. B. Ridzuan, Z. Daud, Z. Ahmad, A. A. Abd Latiff, and H. Awang, “Leachate Treatment Using Up-Flow Anaerobic Sludge Blanket System”, IJIE, vol. 10, no. 1, May 2018, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/1501