摘要：The fallen teak leaves (Tectona grandis), represents an interesting substrate for biogas production. The chemical composition of leaves showed the C, H, N, S, and O content of 48.88, 5.83, 0.55, 0.18, and 30.04 %, respectively. In addition, the leaves contain 2.83% moisture, 11.33 % ash, 83.44% volatile matter and 2.4% fixed carbon, through dry weight determination. The content of total solids (TS), volatile solids (VS) and chemical oxygen demand (COD) in the leaves was measured and the results average were 982,151.93 mg/kg, 819,412.60 mg/kg and 21,333.33 mg/L, respectively. The biogas composition of carbon dioxide (43.57 %) and methane (55.47%) were estimated. Total biogas yield was 1.074 m3/kg achieved through theoretical estimation; and total methane yield reached 0.5964 m3. Based on COD estimation, our study showed that the fallen teak leaves biomass is a potentially valuable fermentation substrate, and produce 7.467 L (0.007 m3) of methane gas. Consequently, the study results confirmed that fallen teak leaves are suitable substrate for biogas production.
