Biogas production from food waste added with crude glycerin produced from biodiesel production

摘要

The objective of this study was to produce biogas from food waste added with crude glycerin produced from biodiesel processes by using 200 L of a semi-batch anaerobic reactor. In start-up state, food waste was fed to the reactor at the range of average organic loading rate of 0.306-1.245 g/Lreactor-day (56.6-230.2 g/day) giving the average methane yield at room temperature of 0.465 m3CH4/kgCOD and average biogas yield of 0.789 m3biogas/kgCOD. In addition of crude glycerin at food waste loading of 1.245 g/Lreactor-day, average biogas volumes was increased from 36.8 L/day to 72.2 L/day and 90.4 L/day after adding with 30.8 mL/day and 46.3 mL/day of glycerin, respectively.