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 [Internet]. 2021 Mar. 28 [cited 2026 Apr. 19];20(79):119-24. Available from: https://geomatejournal.com/geomate/article/view/237