In order to explore the effect of pretreatment on corn straw degradation and biogas production, corn straw was pretreated with mixed microbes and composting at 30°C for 14 days. The characteristics of material were measured and analyzed in the pretreatment process. Then, the pretreated and untreated corn straw was digested by anaerobic fermentation. Gas production and methane content of corn straw were analyzed. The results showed that the biological pretreatment process with mixed microbes could accelerate the degradation rate of straw and increase the degradation efficiency of lignin. The pH value of material was more stable, and the content of organic matter in the material was higher in the pretreatment process of corn straw with mixed microbes. The Scanning Electron Microscope (SEM) images showed that the structure of the lignocellulose was changed by mixed microbes, increasing the exposed area of cellulose and hemicellulose, which was beneficial to improve the utilization efficiency of straw. The degradation rates of hemicellulose, cellulose and lignin were 44.4%, 34.9% and 39.2%, respectively, after the pretreatment process with mixed microbes. Pretreatment was more helpful to increase the methane content in the anaerobic fermentation process of corn straw pretreated with mixed microbes, and could also shorten the fermentation period.

中文翻译：

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玉米秸秆的生物预处理可提高降解效率和沼气产量。

为了探索预处理对玉米秸秆降解和沼气生产的影响，玉米秸秆经过混合微生物预处理，并在30°C下堆肥14天。在预处理过程中测量并分析了材料的特性。然后，将经过预处理和未经处理的玉米秸秆通过厌氧发酵进行消化。分析了玉米秸秆的产气量和甲烷含量。结果表明，混合微生物的生物预处理可以加快秸秆的降解速度，提高木质素的降解效率。在玉米秸秆混合微生物预处理过程中，物料的pH值较为稳定，物料中有机物含量较高。扫描电子显微镜（SEM）图像显示，混合菌改变了木质纤维素的结构，增加了纤维素和半纤维素的暴露面积，有利于提高秸秆的利用效率。经过混合微生物预处理后，半纤维素，纤维素和木质素的降解率分别为44.4％，34.9％和39.2％。预处理对混合微生物预处理的玉米秸秆厌氧发酵过程中甲烷含量增加有帮助，也可以缩短发酵时间。分别经过混合微生物的预处理过程。预处理对混合微生物预处理的玉米秸秆厌氧发酵过程中甲烷含量增加有帮助，也可以缩短发酵时间。分别经过混合微生物的预处理过程。预处理对混合微生物预处理的玉米秸秆厌氧发酵过程中甲烷含量增加有帮助，也可以缩短发酵时间。