Sugarcane bagasse (SCB), one of major agricultural residues in sugar processing, is normally wasted after crushing fresh sugarcane to produce juice prior to crystallization and decolorization to produce different grades of sugar [1]. SCB is commonly utilized as solid fuel for com- bustion in boilers to produce steam for electricity generation and heat exchange used in their own sugar processing. However, tons of SCB are still stored in the plant to start-up the sugar processing in the next season [2]. Moreover, during the combustion of SCB in steam boilers, bottom and fly ash, including unburnt carbon residues is another biomass waste remaining in the plant. SCB-ash mainly consists of silica (SiO2) in its composition that includes other inorganic compounds like alumina (Al2O3) and alkaline metal oxides such as CaO, MgO, Na2O, and K2O.