Ambar Pertiwiningrum, Margaretha Arnita Wuri, Andang Widi Harto, Rachmawan Budiarto, Misri Gozan. HEATING VALUE ENHANCEMENT BY BIOGAS PURIFICATION USING NATURAL ZEOLITE AND RICE STRAW-BASED BIOCHAR. INTERNATIONAL JOURNAL OF GEOMATE [Internet]. 2019 Mar. 30 [cited 2024 May 3];16(55):80-5. Available from: https://geomatejournal.com/geomate/article/view/2483