nanda, N.P.M. 2025. Analysis of the Electrical Energy Potential and Economic Feasibility of Biogas from Coconut Residue in Riau Province: Analisis Potensi Energi Listrik dan Ekonomis Biogas dari Ampas Kelapa Provinsi Riau. Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE). 5, 2 (Dec. 2025), 159-170. DOI:https://doi.org/10.57152/ijeere.v5i2.2467.