Abstract
Lignocellulosic biomasses (LCB) differ in their chemical composition and cell wall architecture from one another and within the same LCB due to varying geographical conditions. Thus, pretreatment parameters need optimization for recovery of sugars across different biomasses. In the current study, Acacia mangium has been investigated at bench scale for its potential as a feedstock for fermentable sugar production. Attempts were first made to target hydrolysis of hemicellulose using dilute acid (DA) as a catalyst. Pretreatment at temperature of 160 °C, residence time of 30 min and H2SO4 concentration of 2% (w/w) yielded highest overall saccharification efficiency (50%) corresponding to a glucan conversion in enzymatic hydrolysis (57.8%). Further enhancement in glucan conversion and reduction in the formation of inhibitors was brought about by using sodium sulfite (SS). It was observed that SS caused a significant increase in overall sugar recovery. Interestingly, the order in which SS and DA were added to t...
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