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This study aimed at determining the efficiency of neutral detergent fiber ( NDF) reduction and conversion to reducing sugars by acid hydrolysis . Two kinds of strong acids as reaction catalysts were used : sulfuric acid (H 2 SO 4 ) at 0.05, 0.1 and 0.15 M concentrations and hydrochloric acid (HCl ) at 0.05 %, 0.1% and 0.2% concentrations. Different times ( 30, 45 and 60 minutes) and temperatures (80, 100, 120 °C) were applied . For H 2 SO 4 , the best hydrolysis was obtained in essay 4 with 60 minutes , at 120 °C and 0.05 mol L - 1 H 2 SO 4 concentration with 93.54 % conversion to reducing sugars. While for HCl, the best result was observed in essay 4 with 60 minutes, at 120 °C and 0.05% HCl concentration of  94.14 %. Hydrolysis with HCl showed the best results , with the lowest levels of fiber and the highest conversion efficiency in reducing sugars . The results were quite important , since it will be possible to use them in future projects , aiming at optimizing the hydrolysis in order to complete the anaerobic digestion process .

MEASUREMENT OF FIBER CONVERSION LEVELS IN REDUCING SUGARS FROM HYDROLYZED SUGARCANE BAGASSE WITH ACID CATALYSTS