秸秆残渣生物炭对玉米秸秆同步糖化发酵产氢的强化作用。
Role of residue cornstalk derived biochar for the enhanced bio-hydrogen production via simultaneous saccharification and fermentation of cornstalk.
机构信息
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
出版信息
Bioresour Technol. 2021 Jun;330:125006. doi: 10.1016/j.biortech.2021.125006. Epub 2021 Mar 18.
Biochar derived from residue cornstalk left after anaerobic bio-hydrogen production (RCA-biochar) was confirmed to enhance bio-hydrogen production from cornstalk hydrolysate. However, the role of RCA-biochar in simultaneous saccharification and fermentation (SSF) during bio-hydrogen production from cornstalk has not yet been revealed. This study therefore aims to fill this knowledge gap. It was observed that with the increase in RCA-biochar concentration from 0 g/L to 10.0 g/L, the maximal cumulative SSF bio-hydrogen yield varied from 24.3 ± 1.1 mL/g-substrate to 154.3 ± 3.6 mL/g substrate under varying pH values - 5.5, 6.0, 6.5, 7.0. The increasing bio-hydrogen production was observed to correlate with both RCA-biochar level and initial pH. Batch tests confirmed that the initial pH had an obvious effect an saccharification, while RCA-biochar affected anaerobic fermentation a lot. The findings revealed the role of previously unrecognized RCA-biochar in SSF bio-hydrogen production from cornstalk, which can provide an alternative approach for lignocellulosic bio-hydrogen production.
由厌氧生物制氢（RCA-生物炭）剩余玉米秸秆衍生而来的生物炭被证实可以提高玉米秸秆水解物的生物制氢产量。然而，RCA-生物炭在玉米秸秆生物制氢过程中的同步糖化发酵（SSF）中的作用尚未被揭示。因此，本研究旨在填补这一知识空白。研究发现，随着 RCA-生物炭浓度从 0 g/L 增加到 10.0 g/L，在不同 pH 值（5.5、6.0、6.5、7.0）下，最大累积 SSF 生物氢气产率从 24.3 ± 1.1 mL/g-底物变化到 154.3 ± 3.6 mL/g 底物。观察到生物氢气产量的增加与 RCA-生物炭水平和初始 pH 值都有关。批处理试验证实初始 pH 值对糖化有明显的影响，而 RCA-生物炭对厌氧发酵影响很大。研究结果揭示了之前未被认识到的 RCA-生物炭在玉米秸秆 SSF 生物制氢中的作用，为木质纤维素生物制氢提供了一种替代方法。
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