Dias, Marina O.S.; Junqueira, Tassia L.; Cavalett, Otá vio; Cunha, Marcelo P.; Jesus, Charles D.F.; Rossell, Carlos E.V.; Maciel Filho, Rubens; Bonomi, Antonio
초록
<P><B>Graphical abstract</B></P><P><ce:figure id='f0040'></ce:figure></P><P><B>Highlights</B></P><P>► Second generation (2G) ethanol is often conceived in stand-alone production plants. ► First generation ethanol from sugarcane produces surplus lignocellulosic materials. ► Integration of first (1G) and second generation ethanol production was simulated. ► Economic and environmental analyses were carried out for 1G, 2G and integrated 1G 2G. ► Integrated 1G 2G has advantages over stand-alone 2G.</P> <P><B>Abstract</B></P><P>Ethanol production from lignocellulosic materials is often conceived considering independent, stand-alone production plants; in the Brazilian scenario, where part of the potential feedstock (sugarcane bagasse) for second generation ethanol production is already available at conventional first generation production plants, an integrated first and second generation production process seems to be the most obvious option. In this study stand-alone second generation ethanol production from surplus sugarcane bagasse and trash is compared with conventional first generation ethanol production from sugarcane and with integrated first and second generation; simulations were developed to represent the different technological scenarios, which provided data for economic and environmental analysis. Results show that the integrated first and second generation ethanol production process from sugarcane leads to better economic results when compared with the stand-alone plant, especially when advanced hydrolysis technologies and pentoses fermentation are included.</P>