In this study, the effect of bioreactor headspace pressure regulation on photo-fermentative hydrogen production (PFHP) from corn stover (CS) was investigated. The results showed that the headspace pressure could significantly affect the performance of PFHP. With the decrease in the reactor headspace pressure (100 kPa–10 kPa), cumulative biohydrogen production first increased and then decreased, the maximum hydrogen yield of 546.57 mL was obtained at the headspace pressure of 30 kPa. The parameters of Gompertz model showed a lower hydrogen partial pressure was beneficial to speed up the reaction process and shorten the hydrogen production delay time of the system, however, too low pressure would inhibit the metabolism of microorganisms in the PFHP process, resulting lower hydrogen yield obtained.

在这项研究中，研究了生物反应器顶空压力调节对玉米秸秆 (CS) 光发酵产氢 (PFHP) 的影响。结果表明，顶空压力可以显着影响 PFHP 的性能。随着反应器顶部空间压力（100 kPa~10 kPa）的降低，累计生物氢产量先 增加后减少，在顶部空间压力为30 kPa时获得最大产氢量546.57 mL。Gompertz模型参数表明，较低的氢分压有利​​于加快反应进程，缩短系统产氢延迟时间，但过低的压力会抑制PFHP过程中微生物的代谢，导致氢气收率降低获得。