Abstract Rice straw and corn stalks were used as fermentation substrate for the evaluation of
cellulases activity secreted by different organisms. The substrates were pretreated with alkaline
hydrogen peroxide (AHP) for 6 h at 30 and 60 C. From the fermentation studies, rice straw and
corn stalks substrates showed the highest cellulases activity after 96 h at 60 C of pre-treatment.