This work addresses the techno-economic analysis for a multi-feedstock biorefinery system using plantain and avocado residues as raw materials. The experimental procedures were performed to obtain biogas and avocado seed oil. Ethanol was included as a third product by the simulation of the whole biorefinery based on reported literature data. The mass and energy balances were obtained using Aspen Plus V.9.0, while the economic assessment was performed using Aspen Process Economic Analyzer. The results demonstrate the potential of integrating avocado and plantain residues as raw materials to produce biogas, ethanol, and avocado seed oil. The integration of raw materials showed an overall improvement of the biorefinery. Experimental extraction of avocado seed oil had a yield of 1.33 +/- 0.95% w/w. In the anaerobic digestion, 282, 116, and 304 ml of CH4 per g of VS were obtained during 15 days of the experiment for plantain peel, exhausted avocado seed, and 1:5 avocado to plantain samples, respectively. These results demonstrate the increase on biogas production when the integration occurs. Therefore, the proposed biorefinery scheme based on 1:5 avocado to plantain integration rate showed techno-economic pre-feasibility, with a profit margin of 3.56 MUSD/yr and a positive NPV in less than 2 years of the project lifetime.
