Sharipuddin, Nur Shaza Syahirah, and Zarizi Awang. “Biofilm System Design and Comparative Study of Biomedia Using in Domestic Wastewater Treatment”. Progress in Engineering Application and Technology 2, no. 2 (December 2, 2021): 001–010. Accessed June 26, 2022. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/714.