Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio, 43, 03043 Cassino, FR, Italy.
Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy.
Bioresour Technol. 2019 Feb;273:416-424. doi: 10.1016/j.biortech.2018.11.040. Epub 2018 Nov 10.
This study focused on the effect of feed glucose and acetic acid on biohydrogen production by Thermotoga neapolitana under continuous-flow conditions. Increasing the feed glucose concentration from 11.1 to 41.6 mM decreased the hydrogen yield from 3.6 (±0.1) to 1.4 (±0.1) mol H/mol glucose. The hydrogen production rate concomitantly increased until 27.8 mM of feed glucose but remained unaffected when feed glucose was further raised to 41.6 mM. Increasing the acetic acid concentration from 0 to 240 mM hampered dark fermentation in batch bioassays, diminishing the cumulative hydrogen production by 45% and the hydrogen production rate by 57%, but induced no negative effect during continuous operation. Indeed, throughout the continuous flow operation the process performance improved considerably, as indicated by the 47% increase of hydrogen yield up to 3.1 (±0.1) mol H/mol glucose on day 110 at 27.8 mM feed glucose.
本研究聚焦于连续流条件下，葡萄糖和乙酸对 Thermotoga neapolitana 生物制氢的影响。将进料葡萄糖浓度从 11.1 增加到 41.6 mM，氢气产量从 3.6（±0.1）减少到 1.4（±0.1）mol H/mol 葡萄糖。氢气的产率则在 27.8 mM 时持续增加，但当进料葡萄糖进一步提高到 41.6 mM 时，产率保持不变。将乙酸浓度从 0 增加到 240 mM 会阻碍批式生物测定中的黑暗发酵，使累积产氢量减少 45%，产氢率减少 57%，但在连续运行中不会产生负面影响。事实上，在连续流动操作中，过程性能得到了显著改善，在 27.8 mM 进料葡萄糖下，第 110 天的氢气产量提高了 47%，达到 3.1（±0.1）mol H/mol 葡萄糖。
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