数字农科院2.0

Biochar-Mediated Enhanced Ethanol Fermentation (Bmeef) In Zymomonas Mobilis Under Furfural And Acetic Acid Stress

文献类型： 外文期刊

作者： Wang, WT; Dai, LC; Wu, B; Qi, BF; Huang, TF; Hu, GQ; He, MX

作者机构：

关键词： Lignocellulosic Hydrolysate; Furfural; Acetic Acid; Biochar; Zymomonas Mobilis

期刊名称： BIOTECHNOLOGY FOR BIOFUELS

ISSN：

年卷期： 2020 年 13 卷 1 期

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Background Pretreatment of lignocellulosic biomass generates different types of inhibitors (e.g., furfural and acetic acid), which could remarkably inhibit subsequent ethanol fermentation. Here, biochar as an additive in the fermentation broth was first applied to enhance ethanol production by Z. mobilis wild-type strain ZM4 in the presence of typical inhibitors. Results This study showed that the biochar-mediated tolerance to furfural and acetic acid for the strain Z. mobilis ZM4 was the highest reported level, resulting in much higher ethanol productivity under stress conditions than that in non-treated conditions. Further analysis showed that adsorptive detoxification was not the controlling factor for enhanced ethanol production under stress conditions, attributed to its low removal of furfural (< 20%) and incapability of acetic acid removal. When biochar was filtered from the biochar-treated inhibitor-containing broth, it still showed enhanced ethanol production. Furthermore, Z. mobilis immobilized on biochar was also observed. Thus, biochar extracts in the fermentation broth and cell immobilization on biochar might be the controlling factors for enhanced ethanol production under stress conditions. Conclusions These results indicate that biochar-mediated enhanced ethanol fermentation (BMEEF) might be a promising strategy for ethanol production from lignocellulosic biomass.

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