title: Hydrothermal pre-treatment of rapeseed straw.
abstract: As a first step for ethanol production from alternative raw materials, rapeseed straw was studied for fermentable sugar production. Liquid hot water was used as a pre-treatment method and the influence of the main pre-treatment variables was assessed. Experimental design and response surface methodology were applied using pre-treatment temperature and process time as factors. The pretreated solids were further submitted to enzymatic hydrolysis and the corresponding yields were used as pre-treatment performance evaluation. Liquid fractions obtained from pre-treatment were also characterized in terms of sugars and no-sugar composition. A mathematical model describing pre-treatment effects is proposed. Results show that enzymatic hydrolysis yields near to 100% based on pretreated materials can be achieved at 210-220 degrees C for 30-50 min, equivalent to near 70% of glucose present in the raw material. According to the mathematical model, a softer pre-treatment at 193 degrees C for 27 min results in 65% of glucose and 39% of xylose available for fermentation.
authors: Department of Chemical, Environmental and Materials Engineering, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain.
authors: Manuel J
authors: MJ
authors: Díaz
authors: Cristóbal
authors: C
authors: Cara
authors: Encarnación
authors: E
authors: Ruiz
authors: Inmaculada
authors: I
authors: Romero
authors: Manuel
authors: M
authors: Moya
authors: Eulogio
authors: E
authors: Castro
mesh_terms: D029741:Brassica rapa / Q000033:anatomy & histology*; D002480:Cellulase / Q000378:metabolism; D005947:Glucose / Q000032:analysis; D006868:Hydrolysis / Q000187:drug effects; D008954:Models, Biological; D013499:Surface Properties / Q000187:drug effects; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000494:pharmacology*; D014994:Xylose / Q000032:analysis
chemical_list: D014867:Water; D014994:Xylose; D002480:Cellulase; D005947:Glucose