Key Laboratory of New Materials and Facilities for Rural Renewable Energy, MOA of China, Henan Agricultural University, Zhengzhou 450002, China.
Key Laboratory of New Materials and Facilities for Rural Renewable Energy, MOA of China, Henan Agricultural University, Zhengzhou 450002, China; Institute of Agricultural Engineering, Huanghe S & T University, Zhengzhou 450006, China.
Bioresour Technol. 2021 Jan;319:124153. doi: 10.1016/j.biortech.2020.124153. Epub 2020 Sep 25.
Co-digestion of substrates can improve hydrogen yield (HY) by adjusting carbon nitrogen ratio (C/N) of fermentation substrates. This study evaluated the enhancement of hydrogen production from co-digestion of duckweed and corn straw via photo-fermentation. The maximum HY of 78.0 mL/g Total solid (TS) was obtained from the mixed ratio of 5:1 (C/N of 13.2), which was 25.4% and 29.6% higher than those of single substrate of duckweed and corn straw, respectively. The effects of initial pH and inoculation volume ratio (IVR) on co-digestion photo-fermentative hydrogen production (CD-PFHP) from duckweed and corn straw were further studied. A maximum HY of 85.6 mL/g TS was achieved under the optimal condition (initial pH 8, IVR 20%, mix ratio of duckweed and corn straw of 5:1). Additionally, both mix ratio and initial pH showed statistical difference (p < 0.05). Acetic acid and butyric acid were found to be the main metabolic by-products during CD-PFHP.
共消化底物可以通过调整发酵底物的碳氮比（C/N）来提高氢气产量（HY）。本研究通过光发酵评估了水葫芦和玉米秸秆共消化提高氢气生产的效果。在混合比例为 5:1（C/N 为 13.2）时，获得了最大的氢气产量 78.0 mL/g 总固体（TS），分别比单一水葫芦和玉米秸秆底物提高了 25.4%和 29.6%。进一步研究了初始 pH 和接种体积比（IVR）对水葫芦和玉米秸秆共消化光发酵产氢（CD-PFHP）的影响。在最佳条件（初始 pH 8，IVR 20%，水葫芦和玉米秸秆的混合比例为 5:1）下，获得了最大的氢气产量 85.6 mL/g TS。此外，混合比例和初始 pH 均表现出统计学差异（p<0.05）。在 CD-PFHP 过程中发现乙酸和丁酸是主要的代谢副产物。
