前处理对玉米秸秆蒸汽爆破效果的影响

为提高纤维乙醇生产过程中秸秆的预处理效果,该文研究了水预浸和CaO前处理对蒸汽爆破和酶解糖化的影响,并利用场发射扫描电镜（FE-SEM）、X-射线衍射仪（XRD）及傅里叶红外光谱仪（FTIR）对其影响机制进行了分析。结果表明：玉米秸秆经30%水（水料质量比30：100）预浸5d、经2%CaO（CaO与秸秆质量比2：100）处理3d或经30%水和2%CaO协同处理1d后再进行蒸汽爆破均可显著提高蒸汽爆破对木质素的降解,降解率由单独蒸汽爆破的20.6%分别提高到27.8%、35.1%和30.9%。玉米秸秆经3种复合预处理和酶解糖化后总糖浓度分别为3.81、3.59和3.46g/100mL,糖得率分...

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Bibliographic Details
Published in农业工程学报 Vol. 28; no. 12; pp. 273 - 280
Main Author 王风芹 尹双耀 谢慧 任天宝 宋安东
Format Journal Article
LanguageChinese
Published 河南农业大学生命科学学院,郑州450002 2012
河南科技学院资源与环境学院,新乡453003
农业部农业微生物酶工程重点实验室,郑州450002%河南农业大学生命科学学院,郑州450002
Subjects
CaO
复合预处理
水处理
玉米秸秆
糖
蒸汽
蒸汽爆破
CaO
蒸汽
糖
复合预处理
水处理
蒸汽爆破
玉米秸秆
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2012.12.044

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Summary:为提高纤维乙醇生产过程中秸秆的预处理效果,该文研究了水预浸和CaO前处理对蒸汽爆破和酶解糖化的影响,并利用场发射扫描电镜（FE-SEM）、X-射线衍射仪（XRD）及傅里叶红外光谱仪（FTIR）对其影响机制进行了分析。结果表明：玉米秸秆经30%水（水料质量比30：100）预浸5d、经2%CaO（CaO与秸秆质量比2：100）处理3d或经30%水和2%CaO协同处理1d后再进行蒸汽爆破均可显著提高蒸汽爆破对木质素的降解,降解率由单独蒸汽爆破的20.6%分别提高到27.8%、35.1%和30.9%。玉米秸秆经3种复合预处理和酶解糖化后总糖浓度分别为3.81、3.59和3.46g/100mL,糖得率分别为42.2%、39.8%和38.3%,比单独蒸汽爆破预处理分别提高了23.7%、16.6%和12.3%。水预浸或CaO复合蒸汽爆破预处理后秸秆结构破坏严重,秸秆相对结晶度由单独蒸汽爆破的42.6%分别提高到47.0%和54.5%。水浸泡或CaO前处理可提高蒸汽爆破预处理效果和后期糖化效果,且所用试剂价格低廉,可以应用推广。
Bibliography:steam; water treatment; sugars; corn stalk; steam explosion; compound pretreatment; CaO
11-2047/S
Wang Fengqin, Yin Shuangyao, Xie Hui, Ren Tianbao, Song Andong,※ （1. College of Life Science, Henan Agricultural University, Zhengzhou 450002, China; 2. Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou 450002, China; 3. College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang 453003, China）
To enhance the pretreatment effect for production of cellulose ethanol, the influences of water immersion and CaO treatments before steam explosion on the structure destruction of corn stalks and enzymatic saccharification were studied. Field emission scanning electron microscopy （FE-SEM）, X-ray diffraction （XRD） and Fourier transform infrared spectroscopy （FT-IR） were involved in this study. The results showed that compared to the control （corn stalks pretreated with steam explosion）, corn stalk immersed with 30% water （mass ratio of water to c
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2012.12.044