Response Surface Methodologies to Investigate the Pretreatment of Sugarcane Bagasse via Alkaline Hydrogen Peroxide

Abstract

This study aims to assess a large number of information related to the process of sugarcane bagasse delignification process using alkaline hydrogen peroxide (H2O2). For this purpose, it was used a central composite rotatable design (CCRD) 23, with three central and six axial points, totalling 17 runs this matrix was applied in the temperature (25.0 to 60.0 °C), H2O2 concentration (2.0 to 15.0 %) and pH (10.0 to 13.0) optimization, using the percentage of insoluble lignin analyzed by the Klason Method as response. The experiments were performed in duplicate. The statistical modelling was confirmed by analysis of variance (ANOVA) and the model was able to predict the response with 92.16% certainty. Through the investigation of response surface and contour curves, it was identified that the conditions optimized for the process are temperature of 60 °C, H2O2 concentration of 10 % m/v and pH of 11.5.