Study of Carbohydrate Hydrolysis From Arracacha Roots (Arracacia Xanthorriza Bancroft) to Produce Fermentable Sugars

In Colombia, approximately 855 840 tons of arracacha are produced each year. The unsalable postharvest root (Arracacia xanthorriza Bancroft) is not commercialized, mainly due to mechanical damage or small and misshapen roots. this work, dry samples were characterized subjected two treatments: one using thermal hydrolysis, applying saturated steam at pressures 0,1034 MPa, 0,2068 0,4137 MPa; another hydrolysis with sulfuric acid in concentrations between 0,252,00 M. Then, the cake resulting from filtration process was enzymatically hydrolyzed (Liquozyme SC DS, Novozymes) 1,5, 5 10 KNU/g (pH 6, 80 _C, 2 h). Fermentation inhibitors (acetic furfural) evaluated best pretreatment. results showed that treatment 1,00 M (2 h) has high yields reducing sugars added enzymatic hydrolysis. maximum level fermentable carbohydrates per gram sample (1,04 g/g) also reached. Regarding fermentation sugar, a higher concentration acetic found lower furfural content. Therefore, discards promising raw material increase supply bioethanol.