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首页> 外文会议>2011 International Conference on Materials for Renewable Energy Environment >Dilute acid hydrolysis of cotton stalks and ethanol production from hydrolytic liquids
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Dilute acid hydrolysis of cotton stalks and ethanol production from hydrolytic liquids

机译：棉秆的稀酸水解和水解液生产乙醇

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Dilute acid hydrolytic condition of cotton stalks and ethanol producing from hydrolytic liquids were studied in this paper. Single factors experiments and orthogonal experiment were designed to explore effects of sulfuric acid concentration, hydrolysis time, solid-liquid ratio and hydrolysis temperature on the yield rates of xylose and glucose in the process of dilute acid hydrolysis of cotton stalks, and condition was optimized, the acid hydrolysis liquids were collected under the optimum condition and used in ethanol fermentation after detoxification, decoloration and condensation process. The ethanol fermentation parameters (concentration of reducing sugar, strain mixture proportion, original pH value, fermentation time) were examined and optimized by single factors and orthogonal design. The results showed that, the optimal dilute acid hydrolytic condition was determined as follows: sulfuric acid concentration 4.0%, hydrolysis time 30 min, solid solution ratio 1∶5, and hydrolysis temperature 121°C and the optimized parameters for ethanol fermentation were identified as reducing sugar 7.0%, inoculating Saccharomyces cerevisiae and Pachysolen tannophilus with proportion 1∶1, original pH value 5.0, and fermentation time between 36 h to 48 h.
机译：研究了棉秸秆稀酸水解条件和水解液生产乙醇的工艺条件。设计了单因素实验和正交试验，探讨了硫酸浓度，水解时间，固液比和水解温度对棉秸秆稀酸水解过程中木糖和葡萄糖产率的影响，并优化了工艺条件，在最佳条件下收集酸水解液，经解毒，脱色，缩合等工艺后用于乙醇发酵。通过单因素和正交设计检查并优化了乙醇发酵参数（还原糖浓度，菌株混合物比例，原始pH值，发酵时间）。结果表明：最佳的稀酸水解条件为：硫酸浓度4.0％，水解时间30min，固溶比1∶5，水解温度121℃，确定了乙醇发酵的最佳参数。还原糖7.0％，以1∶1的比例，原始pH值为5.0，发酵时间在36 h至48 h之间接种啤酒酵母和单宁帕氏菌。

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