M. B. Ridzuan, Z. Daud, A. A. Abdul Latiff, Z. Ahmad, and Z. Zakariah, “Landfill Leachate Treatment Using Hybrid Up-Flow Anaerobic Sludge Blanket (HUASB) Reactor”, ijie, vol. 5, no. 1, Nov. 2013, Accessed: May 06, 2024. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/773