Study on the optimum conditions for anaerobic digestion based biogas production from pineapple leaves

Abstract

The objective of this research was to find the optimum conditions for maximum biogas production from pineapple leaves using the anaerobic digestion method. The experiments were performed in one-litre bottles at the lab-scale; the mesophilic anaerobic digestion process took place at the constant temperature 37±1⁰C. The factor that affected the biogas production efficiency such as type of microorganism, carbon to nitrogen ratio, as well as organic load were investigated. The results showed that pineapple leaves could generate methane with the productivity of 410±7.5 ml/gCOD after 28 days with the following conditions the microorganism source from the Thanh Hoa biogas tank, the organic load of 15 gCOD/L/day at the COD/TN ratio of 70:1, and the COD removal efficiency of 69.5±4.7%.