Ambar Pertiwiningrum, AndangWidi Harto, MargarethaArnita Wuri, Adam Gemilang, Rachmawan Budiarto, and Misri Gozan. “ORGANIC CYCLE SYSTEM: THE RECYCLING OF BIOGAS SLUDGE OF COW MANURE AS BIOCHAR FOR BIOGAS PURIFICATION”. GEOMATE Journal 19, no. 72 (August 30, 2020): 96–101. Accessed February 10, 2026. https://geomatejournal.com/geomate/article/view/1130.