Cellulose, the main component of rice straw, can be enzymat-ically converted to glucose and fermented to bioethanol (Salehiet al., 2012). However, like many other lignocelluloses, the strawhas a recalcitrant structure for enzymatic attacks which subse-quently causes low hydrolysis yield. Therefore, a pretreatmentstep prior to enzymatic hydrolysis and fermentation is requiredto increase the yield of hydrolysis and consequently fermentation(da Costa Sousa et al., 2009; Vandenbossche et al., 2014).