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首页> 外文期刊>Fuel >Adsorption of inhibitors using a CO_2-activated sugarcane bagasse fly ash for improving enzymatic hydrolysis and alcoholic fermentation in biorefineries
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Adsorption of inhibitors using a CO_2-activated sugarcane bagasse fly ash for improving enzymatic hydrolysis and alcoholic fermentation in biorefineries

机译：使用CO_2活化的甘蔗渣粉煤灰吸附抑制剂以改善生物精炼厂的酶促水解和酒精发酵

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摘要

Many compounds released during the pretreatment of lignocellulosic biomass inhibit enzymes and yeasts, leading to a negative impact on the overall efficiency of biorefineries. Here, we propose the removal of phenolic compound and furaldehyde inhibitors by adsorption using CO2-activated sugarcane bagasse fly ash in order to improve both the enzymatic hydrolysis of cellulose and the alcoholic fermentation processes. The activation of fly ash resulted in a substantial enhancement of the specific surface area and pore volume of the adsorbent, improving the adsorption capacity for phenolics by 4.5-fold. The treatment of an inhibitor cocktail with 2% (w/v) activated fly ash resulted in removal of 97% of the phenolic compounds. The enzymatic hydrolysis of microcrystalline cellulose in the presence of the treated inhibitor cocktail resulted in glucose concentration values equivalent to that obtained for the control without the inhibitors. Moreover, the alcoholic fermentation performed using the fly ash-detoxified hydrolysate resulted in a remarkable 5.5-fold increase of the fermentation efficiency. These findings demonstrated that the CO2 activation of the fly ash resulted in an efficient adsorbent for the removal of inhibitors from both the enzymatic hydrolysis and the alcoholic fermentation processes, and could be used to improve the overall efficiency of future biorefineries.
机译：在木质纤维素生物质预处理期间释放的许多化合物会抑制酶和酵母，从而对生物精炼厂的整体效率产生负面影响。在这里，我们建议通过使用CO2活化的甘蔗渣粉煤灰吸附来去除酚类化合物和糠醛抑制剂，以改善纤维素的酶促水解和酒精发酵过程。飞灰的活化导致吸附剂的比表面积和孔体积的显着增加，从而使酚醛树脂的吸附能力提高了4.5倍。用2％（w / v）的活性粉煤灰处理抑制剂混合物可除去97％的酚类化合物。在处理的抑制剂混合物的存在下，微晶纤维素的酶促水解产生的葡萄糖浓度值等于没有抑制剂的对照所获得的浓度。此外，使用粉煤灰脱毒的水解产物进行的酒精发酵导致发酵效率显着提高了5.5倍。这些发现表明，粉煤灰的CO2活化产生了一种有效的吸附剂，可从酶促水解和酒精发酵过程中去除抑制剂，并可用于提高未来生物精炼厂的整体效率。

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