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  • comparison of different alkali-based pretreatments of corn stover for improving enzymatic saccharification

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
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     corn stover was treated with naoh, naoh + anthraquinone (aq), naoh + na2so3(alkaline), naoh + na2so3 (neutral), and naoh + na2s, respectively. the treated corn stover was subjected to hydrolysis with cellulase (20 fpu/g dry biomass) and β-glucosidase (10 iu/g dry biomass). compared with other pretreatment methods, alkaline sodium sulfite pretreatment (assp) at a relatively low temperature of 140 °c provided for the best lignin removal of about 92%. after assp with 10 wt.% of the total alkali charge (na2so3:naoh = 1:1) at 140 °c for 30 min and subsequent enzymatic hydrolysis, a total sugar yield of 78.2% was obtained on the basis of the amount of glucose and xylose released from raw corn stover. this yield was 24.0% higher than that achieved with naoh only under the same conditions. therefore, the supplement of na2so3 in alkali pretreatment can facilitate delignification and significantly improve the enzymatic saccharification.

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