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首页> 外文期刊>Journal of atomic and molecular physics >Improving Anaerobic Digestion of Wheat Straw by Plasma-Assisted Pretreatment
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Improving Anaerobic Digestion of Wheat Straw by Plasma-Assisted Pretreatment

机译：等离子辅助预处理改善小麦秸秆的厌氧消化

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Plasma-assisted pretreatment (PAP) of lignocellulosic biomass has been shown to be an efficient method to decompose lignin and consequently facilitate microbial access to cellulose and hemicellulose. In the present study, PAP was tested for its suitability to enhance bioconversion of wheat straw to methane. In thermophilic batch experiments, methane yields of up to 366 mL/g volatile solids (VSs) were achieved, accounting for a yield increase of 45%. Common lignin-derived inhibitors like 5-hydroxymethylfurfural (5-HMF) and furfural were not detected after PAP, but toxicity test resulted in lower methane yields at higher substrate concentrations, indicating the presence of other unidentified inhibitors. However, in a continuous lab-scale biogas reactor experiment, stable codigestion of cattle manure with 20% PAP wheat straw was demonstrated, while no signs of adverse effects on the anaerobic digestion process were observed. After the introduction of the pretreated wheat straw to the reactor, volatile fatty acid concentrations remained low and stable, while gas production increased. In co-digestion, the PAP wheat straw was converted at an average yield of 343 mL CH4/gVS.
机译：木质纤维素生物质的等离子体辅助预处理（PAP）已被证明是分解木质素并因此促进微生物获取纤维素和半纤维素的有效方法。在本研究中，对PAP进行了测试，以提高小麦秸秆向甲烷的生物转化率。在嗜热的分批实验中，甲烷的挥发物含量高达366 / mL / g（VSs），增加了45％。 PAP后未检测到常见的木质素衍生抑制剂，如5-羟甲基糠醛（5-HMF）和糠醛，但毒性试验导致底物浓度较高时甲烷产量降低，表明存在其他未知的抑制剂。但是，在实验室规模的连续沼气反应器实验中，证明了牛粪与20％PAP小麦秸秆的稳定共消化，同时没有观察到对厌氧消化过程产生不利影响的迹象。将预处理过的小麦秸秆引入反应器后，挥发性脂肪酸的浓度仍保持较低且稳定，同时天然气产量增加。在共消化中，PAP小麦秸秆的转化平均产量为343 mL CH4 / gVS。

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