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为阐明木质纤维素原料乙醇发酵残留物产甲烷的能力,以汽爆玉米秸秆为原料进行高底物浓度同步糖化发酵(SSF)产乙醇,并将乙醇发酵残留物、发酵残留物上清及固体部分分别进行产甲烷潜力实验。研究结果表明,汽爆玉米秸秆同步糖化发酵底物浓度达到30%(w/w),乙醇浓度为48.9g/L。发酵残留物产甲烷潜力为46mL CH_4/g底物,上清部分产甲烷潜力为12mL CH_4/g底物,固体部分产甲烷潜力达到286mL CH_4/g底物,从而证明高底物浓度汽爆玉米秸秆乙醇发酵残留物具有较好的产甲烷潜力。
In order to elucidate the ability of methane production from ethanol fermentation residues of lignocellulosic raw materials, steam-exploded corn stalks were used to produce ethanol with high substrate concentration simultaneous saccharification and fermentation (SSF), and ethanol fermentation residues, fermentation residue supernatant and solid fractions Respectively methanogenic potential experiment. The results showed that the concentration of saccharifying and fermentation substrate of steam explosion popcorn straw reached 30% (w / w) and the ethanol concentration was 48.9 g / L. The methane production potential of the fermentation residue was 46 mL CH 4 / g substrate, the potential of methane production in the supernatant was 12 mL CH 4 / g substrate, and the methane partial potential of the solid portion reached 286 mL CH 4 / g substrate, demonstrating that the high substrate concentration steam explosion corn stover Ethanol fermentation residues have better methane production potential.