Effect of lime pretreatment to the enzymatic saccharification efficiency of three kinds of straws
SONG Li-li
XIE Jian-song
ZHANG Ning-liang
LU Mei-xia
Abstract：Corn straw,rice straw and wheat straw were chosen as the substrates,and the effect of lime pretreatment time and temperature were comparatively examined by determination of the enzymatic transformation ratio.Results showed the yield of reducing sugar of wheat straw and rice straw could reach 60.38% and 46.77% respectively after lime pretreatment of 2 h at the temperature of 90 ℃.In contrast,corn straw needed more higher pretreated temperature of 121 ℃ for 1 h,whose yield of reducing sugar reached 56.82%.Wheat straw was more suitable for the pretreatment using lime.Further microstructural analysis of the straw samples was investigated by infrared spectrum,results showed that lime pretreatment could significantly degrade lignin in wheat straw.The selective degradation of lignin promoted the destruction of the spatial structure barrier of lignocellulosic macromolecules,retained more cellulose for later enzymatic saccharification, and improved straw enzymatic saccharification efficiency.
Keywords：lime pretreatmentstrawenzymatic saccharificationlignocelluloseconversion ratio of reducing sugar
Publication Date：2017-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 21-29 )