EFFECT OF γ-RAYS IRRADIATION AND ALKALI SOLUTION PRETREATMENT ON HYDROLYZING ENZYME AND MICROCOSMIC STRUCTURE OF CORN STRAW

To increase yield of reducing sugar enzymatic hydrolyzed from corn straw yield of corn stalk on Enzymatic hydrolysis,γ-rays radiation and NaOH solution pretreatment were used.The changes of microstructure of the corn straw before and after pretreatments were characterized by IR,X-rays diffraction and SEM.The result shows that the γ-rays radiation can significantly decrease the essential concentration of NaOH solution and shorten the immersion time,but it could not affected the yield of reducing sugar remarkably.The scanning electron microscopy(SEM) results show that the sample which was treated at the 200 kGy irradiation dose and NaOH solution circumstance has the biggest surface area increase.The reducing sugar content of enzyme hydrolyzed corn straw treated at 200 kGy irradiation dose and 2% NaOH solution was achieved 48.34%,which provides the theoretical basis for industry ethanol production using enzyme hydrolyzed corn straw.