An appropriate approach for biogas production and utilization from waste food and animal manure in Khon Kaen University

This research presents a study of an appropriate approach for biogas production and utilization from waste food and animal manure in Khon Kaen university. The quantity of waste food and animal manure were collected, and the economic feasibility of biogas production was studied. From the study, it was found that the average amount of waste food and animal manure were 989.88 and 1,716.57 kg/day, respectively. The appropriate size of digester to produce biogas is 500 cubic meters. From a study of feasibility of four projects proposed for biogas utilization in this study, it was found that using biogas as LPG substitution by compressing in the tank is a suitable method for the university community. The NPV is 482,470.38 , B/C ratio = 1.12, IRR = 17.37 % and the payback period is 4.7 years. The results showed that this project has the economic possibility and cost-effective investment for biogas production and utilization in Khon Kaen university.