In addition to being used as fuels in bioethanol production generating steam and electricity, sugarcane bagasse and trash may be used as feedstock for second generation ethanol production. The amount of surplus lignocellulosic material used as feedstock depends on the energy consumption of the production process. In this work simulations of the integrated first and second generation ethanol production processes from sugarcane were carried out using Aspen Plus, comparing different configurations of the cogeneration systems. Economic and environmental analyses were carried out, for comparison of different configurations. It is shown that surplus electricity sell can benefit second generation ethanol. © 2012 Elsevier B.V.30 172176Čuček, L., Martín, M., Rossmann, I.E.G., Kravanja, Z., Energy, water and process technologies integration for the simultaneous production of ethanol and food from the entire corn plant (2011) Comp. Chem. Eng., 35, pp. 1547-1557Dias, M., Ensinas, A.V., Nebra, S.A., Maciel Filho, R., Rossell, C.E.V., Maciel, M.R.W., Production of bioethanol and other bio-based materials from sugarcane bagasse: Integration to conventional bioethanol production process (2009) Chem. Eng. Res. Des., 87, pp. 1206-1216Dias, M.O.S., Junquiera, T.L., Cavalett, O., Cunha, M.P., Jesus, C.D.F., Rossell, C.E.V., Maciel Filho, R., Bonomi, A., Integrated versus stand-alone second generation ethanol production from sugarcane bagasse and trash (2012) Bioresource Technology, 103, pp. 152-161Guineé, J., (2002) Handbook on Life Cycle Assessment: Operational Guide to the ISO Standards, , Kluwer Academic Publishers, DordrechtNigam, P., Singh, A., Production of liquid biofuels from renewable resources (2011) Prog. Energy Combust. Sci., 37, pp. 52-68