Assay conditions for xylanase have also been reported to be 50 °C temperature and pH 4–5 [93]. Therefore, enzymatic hydrolysis is advantageous because of its low toxicity, low utility cost and low corrosion compared to acid or alkaline hydrolysis [28] and [59]. Moreover, no inhibitory by-product is formed in enzymatic hydrolysis [58]. However, enzymatic hydrolysis is carried out by cellulase enzymes that are highly substrate specific [23] and [59].