碱性氧化物预处理玉米秸秆维管柱_皮层和表皮研究(2)

固液比

维管柱皮层表皮

1∶201∶151∶15

发酵时间/d

510515510

碱性氧化物质量分数/%

111

预处理时间/d

310315310

还原糖含量/%

15192121435193

图6　预处理时间对发酵液中还原糖含量的影响

Fig.6　Effectofpretreatmenttimeonreducing

sugarconcentration

3　结束语

通过研究发现不同玉米秸秆组分(包括维管

柱、皮层和表皮)的不同预处理方式显著影响秸秆发酵液中的还原糖含量。维管柱、皮层和表皮在优化条件后发酵液的还原糖含量分别为15192%、12143%和5193%,预处理后的木质纤维素糖化率

215　正交试验结果

通过正交试验,考察各秸秆组分发酵液中的最高还原糖含量以及各相应因素条件(表4),结果表明,通过优化维管柱、皮层和表皮为底物发酵液中还原糖含量分别为15192%、12143%和5193%。通过相应固液比参数,计算出总还原糖量分别为63618、37219和17719mg;预处理后木质纤维素糖化率(2g底物)分别为31184%、18165%和819%。

参

考

分别为31184%、18165%和819%。发酵液中还原

糖含量处于较低水平时,FPA文

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