Sugar cane bagasse as feedstock for second generation ethanol production. Part I: Diluted acid pretreatment optimization

Restructuring the processes for furfural and xylose production from sugarcane bagasse in a biorefinery concept for ethanol production

“…This condition was selected considering the toxic potential of the hydrolysate produced under the conditions that promoted the highest xylose recovery. These results were very similar to the one reported by Vargas and Pereira [19], where they report a xylose concentration of 50.1 g/L and xylose yield of 60.2% under their optimized conditions (acid concentration: 1.09% v/v; solid/liquid ratio: 1/2.8 g/mL and time: 27 min). It is important emphasizing that these hydrolysis experiments were performed in autoclave, but the hydrolysis of the sugarcane bagasse under these experimental conditions in the same reactor used for furfural production gave similar results (xylose concentration of 38.3 AE 1.5 g/L and xylose yield of 15.5 AE 0.9 g/100 g sugarcane bagasse).…”

“…In this case, the xylose concentration obtained in the hydrolysate was much higher than the values achieved in the other experiments, as a consequence of an elevated extraction yield. Similar performance was obtained by Vargas and Pereira [19].…”

“…2 clearly shows the increase in the furfural yield when the values of the variables were increased, with the reaction time and acid concentration presenting more pronounced effects on this response than the temperature. Other authors have also reported an increase in the xylose degradation to furfural when the temperature, the reaction time, and/or the acid concentration used during the hydrolysis were increased [18,19].…”

Oil-Water Adsorptive Properties of Chemically Treated Sugarcane Bagasse

“…Different pretreatment methods applied to SB may alter the celluose crystallinity of or selectively remove the hemicellulose and lignin in the lignocellulosic substrate. The methods include physical process such as milling (Chang & Holtzapple, 2000;Gharpuray et al, 1983) and irradiation (Taherzadeh & Karimi, 2008;Lafitte-Trouqué and Forster, 2002), physical-chemical methods such as using ammonia explosion (Gollapalli et al, 2002) and acids and bases (Betancur & Pereira, 2010;Deschamps et al, 1996;Sun et al, 1995), and biological methods such as using bacteria and fungi (Kurakake et al, 2007;Srilatha et al, 1995). Acids hydrolyse hemicellulose and minor amounts of lignin (Geddes et al, 2010;Rocha et al, 2011) while bases hydrolyse hemicellulose and lignin (Zhang & Lynd, 2004;Jackson, 1977).…”

Bioeconomy: Fermented Waste Management and Pectinases Purification from Thermomyceslanuginosus

“…Among industrial applications of pectinases are using these enzymes as an animal feed supplementation [4].Sugar cane bagasse is one of the main by-products generated during production of first generation bioethanol and is also recognized as a very promising feedstock for cellulosic ethanol or second generation bioethanol due to the high carbohydrate content that remains in the fibre [5,6]. However, the low yield from the conversion into fermentable sugars is a challenge because the recalcitrance of lignocellulose limits the access of cellulases to the cellulose chains [7][8][9]. Solid-state fermentation involves the growth of microorganisms on moist substrate.…”