Afisna, L., Verdia, V., Syaukani, M. and Saputra, A. 2022. Adsorbent-based Biogas Quality Analysis through Purification Process. Jurnal Pendidikan Teknologi Kejuruan. 5, 3 (Oct. 2022), 70-75. DOI:https://doi.org/10.24036/jptk.v5i3.27623.