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Statistical Optimization of the Total Reducing Sugars Yield from the Dilute Acid Hydrolysis of Sugarcane Bagasse

Journal: International Research Journal of Advanced Engineering and Science (IRJAES) (Vol.3, No. 3)

Publication Date:

Authors : ;

Page : 127-134

Keywords : Sugarcane bagasse; reducing sugar; acid hydrolysis; surface response; statistical modelling and optimization;

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Abstract

The dilute acid hydrolysis of sugarcane bagasse using sulphuric acid at different concentrations (2.32-5.68% w/w), hydrolysis times (18-52 min) and hydrolysis temperatures (76-144°C) were studied. The total reducing sugar present in the hydrolysate was quantified using DNS Method. A five level Central Composite Design (CCD) was used to develop a statistical model for the optimization of process variables which are acid concentration, hydrolysis time and hydrolysis temperature. Response Surface Methodology (RSM) was employed for the optimization of the dilute acid hydrolysis conditions. The optimal hydrolysis conditions that resulted in the maximum total reducing sugar concentration were acid concentration of 4.99% (w/w), hydrolysis temperature of 90.41°C and hydrolysis time of 44.84 minutes. Under these conditions, the total reducing sugar concentration was obtained to be 21.7383 g/L. Quadratic model selected for the analysis was then validated.

Last modified: 2018-09-07 19:55:37