초록
A process of anaerobic digestion of agricultural biomass was simulated by SuperPro Designer software v 8.5 to analyze the cost of production. The simulated project used fruits and vegetable wastes as a feedstock. The concentration of methane produced is 55% (v/v) from a total of 936.8 m<SUP>3.</SUP> h<SUP>-1</SUP> biogas and after purification, the concentration of methane is upgraded up to 95% (v/v). The system was designed to treat the agricultural waste, and was able to reduce more than 60% of the initial COD (chemical oxygen demand). From the study, economic analysis shows that the profit margin is achieved at 11% and the rate of return of investment is at 12% which gives a payback period of 8.2 years.