“THE UTILIZATION OF BIOGAS SLUDGE BIOCHAR TO LEAD ZERO WASTE SYSTEM IN BIOGAS IMPLEMENTATION: THE EFFECT OF VOLUME ON CARBON DIOXIDE AND METHANE CONTENT”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 20, no. 79, pp. 119–124, Mar. 2021, Accessed: Jun. 22, 2026. [Online]. Available: https://geomatejournal.com/geomate/article/view/237