底物质量浓度对玉米秸秆同步糖化生物制氢的影响

Effects of different substrate concentration on hydrogen production from corn straw by simultaneous saccharification

中文关键词: 底物浓度  同步糖化  生物制氢  光合细菌

英文关键词: substrate concentration  simultaneous saccharification and fermentation  bio-hydrogen production  photosynthetic bacteria

中文摘要:

      利用HAU-M1光合细菌对玉米秸秆同步糖化生物制氢工艺进行实验研究，提出了同步糖化生物制氢工艺中玉米秸秆底物浓度与pH值、还原糖浓度、氢气浓度和累积产氢量等因素之间的相关关系，探讨了底物浓度对玉米秸秆同步糖化生物制氢工艺的影响规律。实验结果表明：当玉米秸秆底物浓度为25g/L时，玉米秸秆同步糖化生物制氢工艺的累积产氢量达到最高，为186ml；当玉米秸秆底物浓度为15g/L时，玉米秸秆同步糖化生物制氢工艺的氢气浓度达到最高，为48%；玉米秸秆同步糖化制氢工艺的产氢高峰期为12～48h，48h后逐渐停止产氢，可为进一步优化和完善以生物质为基质的同步糖化生物制氢工艺理论与技术提供科学参考。

英文摘要:

      Bio-hydrogen production from corn stalk by photosynthetic bacteria HAU-M1 was studied in this paper. The correlations among accumulated hydrogen production yield and substrate concentration, pH, reducing sugar concentration, hydrogen concentration during the process of simultaneous saccharification and fermentative bio-hydrogen production were proposed. The impact of substrate concentration on the simultaneous saccharification and fermentative bio-hydrogen production from corn straw was discussed. It was found that the maximum accumulated hydrogen production of 186 ml was obtained at substrate concentration of 25 g/L. The maximum hydrogen concentration of 48% was obtained at substrate concentration of 15 g/L. Hydrogen production went well in 12~48h, and decreased gradually after 48h. The results could provide scientific reference for optimizing and improving the technology of simultaneous saccharification and fermentative bio-hydrogen production from cornstalks.