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首页> 外文期刊>Journal of industrial and engineering chemistry >Improvement of ethanol fermentation from lignocellulosic hydrolysates by the removal of inhibitors
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Improvement of ethanol fermentation from lignocellulosic hydrolysates by the removal of inhibitors

机译：通过去除抑制剂改善木质纤维素水解物中乙醇的发酵

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摘要

In this study, the removal efficiency of fermentation inhibitors in a lignocellulosic hydrolysate by electrodialysis (ED) and the ethanol performance of ED-treated hydrolysate were investigated. The fermentable sugars and inhibitors concentrations in the hydrolysate differed significantly depending on the kind of biomass and acid catalysts. In the mixed hardwood, acetic acid and furfural in the hydrolysate were high as 8.41-8.57 g/L and 2.68-4.23 g/L, respectively, but 5-hydroxymethylfurfural (HMF) concentration was relatively low compared with that of mixed softwood. The ED process showed the high effectiveness for removing acetic acid and total phenolic compounds in the hydrolysate without loss of fermentable sugars. However, most of the HMF and furfural remained in the hydrolysate after ED. Ethanol fermentation was not completed in untreated and mixed hardwood ED-treated hydrolysates due to the high concentration of furfural. Meanwhile, ethanol fermentation was successfully performed in a mixed softwood ED-treated hydrolysate pretreated with dicarboxylic acid. The maximum ethanol concentration attained after fermentation with an initial fermentable sugar level of 27.78 g/L was 10.12 g/L after 48 h.
机译：在这项研究中，研究了通过电渗析（ED）去除木质纤维素水解产物中发酵抑制剂的效率和经过ED处理的水解产物的乙醇性能。水解产物中可发酵糖和抑制剂的浓度根据生物质和酸催化剂的种类而显着不同。在混合硬木中，水解产物中的乙酸和糠醛分别高达8.41-8.57 g / L和2.68-4.23 g / L，但与混合软木相比，5-羟甲基糠醛（HMF）的浓度相对较低。 ED法显示出在去除水解产物中的乙酸和总酚类化合物上的高效率而不会损失可发酵糖。但是，ED处理后，大多数HMF和糠醛保留在水解物中。由于糠醛浓度高，乙醇发酵在未经处理的混合硬木ED处理过的水解物中无法完成。同时，在经二羧酸预处理的混合的经ED处理的针叶木水解产物中成功进行了乙醇发酵。发酵后初始可发酵糖水平为27.78 g / L时，达到的最大乙醇浓度在48小时后为10.12 g / L。

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