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Degradation and transformation of furfural derivatives from hydrothermal pre-treated algae and lignocellulosic biomass during hydrogen fermentation
Renewable and Sustainable Energy Reviews ( IF 15.9 ) Pub Date : 2020-06-24 , DOI: 10.1016/j.rser.2020.109983
Chihe Sun , Qiang Liao , Ao Xia , Qian Fu , Yun Huang , Xianqing Zhu , Xun Zhu , Zhengxin Wang

The inhibitory effects of typical intermediate degradation products of furfural including furfuralcohol and furoic acid, as well as the transformation characteristics and the corresponding rate-limiting step, were analysed during hydrogen fermentation in this study. The results showed that furfural inhibition on hydrogen production were much higher than its derivatives, resulting in a maximum inhibition coefficient in the range of 7.1%–99.8%. Furfural at the concentrations ranging from 1 to 4 g/L was completely degraded after 48 h of fermentation, whereas 49%–70% of furfuralcohol remained unconverted after 96 h of fermentation. The degradation of furfural was actually an aldehyde-alcohol transformation process. Although adding furfuralcohol prolonged the lag-phase time and reduced the hydrogen production peak rate, it had slightly negative impacts on the accumulative hydrogen yield. Additionally, furoic acid exhibited a higher degradation rate than that of furfural and furfuralcohol, which was completely degraded after 24 h of fermentation. The typical metabolic product was acetic acid, and this process may simultaneously produce hydrogen. However, the transformation of furfuralcohol to furoic acid was still a rate-limiting step. Compared with the control group, the energy conversion efficiencies with the addition of furfural derivatives could decrease by 12.7%–91.7%. A high concentration (above than 2 g/L) of furfural and its derivatives would also significantly decrease the species richness and diversity.



中文翻译:

氢发酵过程中水热预处理藻类和木质纤维素生物质中糠醛衍生物的降解和转化

分析了氢发酵过程中糠醛的典型中间降解产物(包括糠醇和糠酸)的抑制作用,以及转化特性和相应的限速步骤。结果表明,糠醛对产氢的抑制作用远大于其衍生物,导致最大抑制系数在7.1%〜99.8%范围内。发酵48小时后,糠醛的浓度范围为1至4 g / L完全降解,而发酵96小时后,糠醛中49%–70%的糠醛仍未转化。糠醛的降解实际上是醛-醇转化过程。尽管加入糠醇可延长滞后时间并降低制氢峰值速率,它对累积氢产量有轻微的负面影响。此外,糠酸比糠醛和糠醇具有更高的降解率,糠醛和糠醇在发酵24小时后被完全降解。典型的代谢产物是乙酸,该过程可能同时产生氢。然而,糠醇向糠酸的转化仍然是限速步骤。与对照组相比,添加糠醛衍生物的能量转换效率可降低12.7%–91.7%。高浓度(高于2 g / L)的糠醛及其衍生物也会显着降低物种的丰富度和多样性。发酵24小时后,其完全降解。典型的代谢产物是乙酸,该过程可能同时产生氢。然而,糠醇向糠酸的转化仍然是限速步骤。与对照组相比,添加糠醛衍生物的能量转换效率可降低12.7%–91.7%。高浓度(高于2 g / L)的糠醛及其衍生物也会显着降低物种的丰富度和多样性。发酵24小时后,其完全降解。典型的代谢产物是乙酸,该过程可能同时产生氢。然而,糠醇向糠酸的转化仍然是限速步骤。与对照组相比,添加糠醛衍生物的能量转换效率可降低12.7%–91.7%。高浓度(高于2 g / L)的糠醛及其衍生物也会显着降低物种的丰富度和多样性。添加糠醛衍生物的能量转换效率可能下降12.7%–91.7%。高浓度(高于2 g / L)的糠醛及其衍生物也会显着降低物种的丰富度和多样性。添加糠醛衍生物的能量转换效率可能会降低12.7%–91.7%。高浓度(高于2 g / L)的糠醛及其衍生物也会显着降低物种的丰富度和多样性。

更新日期:2020-06-24
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