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Chemical and structural analysis of alkali pretreated pinewood for efficient ethanol production

机译：碱预处理松木有效乙醇生产​​的化学和结构分析

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Improvement of enzymatic hydrolysis and ethanol production from softwood pine was conducted by pretreatment with 8% (w/v) NaOH at different temperatures of 0, 25, and 80 degrees C for 2 h. Compared with the untreated wood, the lowest temperature resulted in the highest improvement of 271.1 and 218.2% in glucose and ethanol production yields, respectively. In addition to the pretreatment, Tween-20 as a non-ionic surfactant was used to enhance the enzymatic hydrolysis and fermentation yields by decreasing the ineffective adsorption of cellulases to the substrate. Addition of Tween-20 modified the glucose and ethanol yields from 10.9 and 10.4% for untreated wood to 39.2 and 47.8%, respectively. Structural analyses, including SEM and FTIR along with swelling and buffering capacity measurements, indicated that alkaline pretreatment modified the structure of pinewood by decreasing cellulose crystallinity and lignin content as well as increasing water absorbance and resistance to pH.
机译：通过用8％（w / v）NaOH在0、25和80摄氏度的不同温度下预处理2小时，可以改善软木松的酶促水解和乙醇生产。与未处理的木材相比，最低的温度分别使葡萄糖和乙醇的产量最高提高了271.1％和218.2％。除预处理外，还使用Tween-20作为非离子表面活性剂，通过减少纤维素酶对底物的无效吸附来提高酶促水解和发酵产量。吐温20的添加使未处理木材的葡萄糖和乙醇收率分别从10.9％和10.4％增至39.2％和47.8％。包括SEM和FTIR在内的结构分析以及溶胀和缓冲能力的测量结果表明，碱性预处理通过降低纤维素的结晶度和木质素含量以及提高吸水率和抗pH值来改变松木的结构。

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