Paper Title
Biogas Production from Fallen Teak (Tectonagrandis) Leaves with Co-Digestion of Algae

Abstract
The fallen teak leaves (Tectonagrandis), represents an interesting substrate for biogas production. The codigestion could be beneficial for produce highest amount methane content compared to the mono-substrate. The content of total solids (TS), volatile solids (VS) and chemical oxygen demand (COD) in the leaves. Our study shows the fallen teak leaves biomass is a potentially valuable fermentation substrate The methane concentration increases, while the carbon dioxide decreases, basically in the same proportion. It is also observed that, in the biogas reaches 71.9% in the methane concentration in the teak leaves whereas, for the teak leaves, the biogas reaches the 62.9% higher methane concentration more than non-pretreatment. Therefore, teak leaves are the potential biogas fermentation raw material and can be applicable through co-digestion as well. Consequently, the study results confirm that fallen teak leaves are very suitable as a substrate for biogas production. Keywords: Tectonagrandis, biomass, Co-digestion, Biogas production.