title: Manufacture of fermentable sugar solutions from sugar cane bagasse hydrolyzed with phosphoric acid at atmospheric pressure.
abstract: Sugar cane bagasse, a renewable and cheap bioresource, was hydrolyzed at 100 degrees C using phosphoric acid at different concentrations (2, 4, or 6%) and reaction times (0-300 min) to obtain fermentable sugar solutions, which have a high concentration of sugars (carbon source for microorganism growth) and a low concentration of growth inhibitors (acetic acid and furfural). Xylose, glucose, arabinose, acetic acid, and furfural were determined following the hydrolysis. Kinetic parameters of mathematical models for predicting these compounds in the hydrolysates were obtained. Derived parameters such as efficiency of hydrolysis or purity of hydrolysates were considered to select as optimal conditions 6% phosphoric acid at 100 degrees C for 300 min. Using these conditions, 21.4 g of sugars L(-)(1) and <4 g of inhibitors L(-)(1) were obtained from the hydrolysis with a water/solid ratio of 8 g of water g(-)(1) of sugar cane bagasse on a dry basis.
authors.affiliation: Department of Food Science and Technology, U A M Reynosa-Aztlán, Universidad Autónoma de Tamaulipas, Apartado Postal 1015, Reynosa, Tamaulipas, 88700 Mexico.
authors.forename: Sara
authors.initials: S
authors.lastname: Gámez
authors.forename: José A
authors.initials: JA
authors.lastname: Ramírez
authors.forename: Gil
authors.initials: G
authors.lastname: Garrote
authors.forename: Manuel
authors.initials: M
authors.lastname: Vázquez
mesh_terms: D001274:Atmospheric Pressure; D002241:Carbohydrates / Q000737:chemistry*; D005285:Fermentation; D006868:Hydrolysis; D010756:Phosphoric Acids / Q000737:chemistry*; D006109:Poaceae / Q000737:chemistry*; D012996:Solutions
chemical_list: D002241:Carbohydrates; D010756:Phosphoric Acids; D012996:Solutions; C030242:phosphoric acid