Popi Febrianti and Dwi Kemala Putri 2024. The Influence Of Chemical Oxygen Demand (COD) And pH Of Pome As Biogas Raw Material On The CH4 Produced. International Journal of Science and Mathematics Education. 1, 4 (Dec. 2024), 44–55. DOI:https://doi.org/10.62951/ijsme.v1i4.100.