Produksi Gas Metana Dari Limbah Jerami Padi Dengan Inokulasi Mikroorganisme Rumen Sebagai Sumber Energi Terbarukan

Oil and natural gas resources that comes from fossil energy keeps diminishing. So research developments of alternative energy sources are increasingly being carried out, one of which is anaerobic production of methane gas. Methane gas produces a large enough ratio of energy output/input of 28 Mj/Mj. The source of methane gas used in this study was berlignoselulosa biomass in the form of rice straw waste, because its number reaches 180 million tons per year and as much as 36-62% of it is discharged and burned by the public. Currently, anaerobic fermentation of biomass berlignoselulosa experiences many obstacles, because of the difficulty of three polymers which are cellulose, lignocellulose and hemicellulose to be broken down by methane-producing bacteria. The purpose of this study was to investigate the effect of rumen microorganisms in the production of biogas from rice straw waste. It was expected that by rumen microorganisms inoculation, the resulting methane yield would be better and faster so that rice straw waste could be utilized as a source of renewable energy. The research methodology was first to pretreatment rice straw backs with thermal and mechanical degradation of the lignin to facilitate disruptive anaerobic fermentation of rice straw, then to inoculate the rumen microorganisms with volume variable of 5%, 10% and 15%. Operating conditions of the study with a batch system for 21 days, pH 6-7, a temperature of 30 - 40 ° C, and a pressure of 1 atm. The best research result so far was the concentration of CH4 in the variable 15% at 21st day with the amount of 56484 ppm.