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Hyper-thermal acid hydrolysis and adsorption treatment of red seaweed, Gelidium amansii for butyric acid production with pH control

机译:酸碱度控制下红海藻(Gelidium amansii)的超高温酸水解和吸附处理

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摘要

Optimal hyper-thermal (HT) acid hydrolysis conditions for Gelidium amansii were determined to be 12% (w/v) seaweed slurry content and 144 mM H2SO4 at 150 A degrees C for 10 min. HT acid hydrolysis-treated G. amansii hydrolysates produced low concentrations of inhibitory compounds and adsorption treatment using 3% activated carbon. An adsorption time of 5 min was subsequently used to remove the inhibitory 5-hydroxymethylfurfural from the medium. A final maximum monosaccharide concentration of 44.6 g/L and 79.1% conversion from 56.4 g/L total fermentable monosaccharides with 120 g dw/L G. amansii slurry was obtained from HT acid hydrolysis, enzymatic saccharification, and adsorption treatment. This study demonstrates the potential for butyric acid production from G. amansii hydrolysates under non-pH-controlled as well as pH-controlled fermentation using Clostridium acetobutylicum KCTC 1790. The activated carbon treatment and pH-controlled fermentation showed synergistic effects and produced butyric acid at a concentration of 11.2 g/L after 9 days of fermentation.
机译:确定了金缕梅的最佳高温(HT)酸水解条件是在150 A的温度下10分钟使海藻浆含量为12%(w / v)和144 mM H2SO4。经HT酸水解处理的金露菌水解产物产生低浓度的抑制性化合物,并使用3%的活性炭进行吸附处理。随后使用5分钟的吸附时间从培养基中除去抑制性5-羟甲基糠醛。通过HT酸水解,酶促糖化和吸附处理,最终最终最大单糖浓度为44.6 g / L,转化率为56.4 g / L的总发酵单糖和120 g dw / L的金黄色葡萄球菌浆液,转化率为79.1%。这项研究表明,使用丙酮丁醇梭菌(Clostridium acetobutylicum)KCTC 1790,在非pH值控制和pH值控制的发酵条件下,从金黄色琼脂糖水解物生产丁酸的潜力。活性炭处理和pH值控制的发酵显示出协同作用,并产生了丁酸。发酵9天后浓度为11.2 g / L。

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