Paper Title
Efficacy Of Sodium Hydroxide Impregnation In The Hydrolysis Of Dicksonia And Cactus Lgnocellulosic Biomass At Optimized Conditions.

Abstract
1g/l lignocellulosic feedstock of Dicksonia and Cactus were characterized to determine the hydrolysis of the material biomass which includes; cellulose, lignin, hemicelluloses and total sugar contents. The Analyzed sample materials were impregnated with different concentrations of NaOH (1%, 2.5%, 5%, 10%, 15%, 20% and 25%), assessed at varying temperatures (10OC, 30, 60, 90, 120, 1500C ), time in minutes (10, 20, 30, 45, and 60) and raw material concentrations (0.35g/l, 0.75g/l and 1.0g/l) respectively. Total carbohydrate (TCH) yield for the above parameters were determined using phenol sulfuric acid method for monomericc sugars (xylose, arabinose, mannose, glucose, and galactose). Maximum TCH yields were realized at 20% concentration of sodium hydroxide in 1g/l of Dicksonia and cactus lignocellulosic material for 20 minutes and at maximum temperature of 300C. A control was also run intermittently at the same optimized conditions on temperature of 300C, for 20 minutes and 1g/l substrate concentration, using the same impregnating medium of 20% sodium hydroxide. However, after the pretreatment, the percentage w/w of lignocellulosic sample materials was determined. Assessment by weight reduction of the substrate materials and total sugar yıeld showed the effectiveness of 20% sodium hydroxide concentration in the removal of lignin content, with weight loss in hemicelluloses and cellulose. However, further investigations are required for enzymatic hydrolysis and fermentation in this study. Keywords- Lignocellulosic feedstock, Pretreatment, Optimized conditions, Bioethanol, Dicksonia and Cactus.