Syngas fermentation of Clostridium carboxidivoran P7 in a hollow fiber membrane biofilm reactor: Evaluating the mass transfer coefficient and ethanol production performance.

Highlights: [•] Low mass transfer efficiency is one major limitation in syngas fermentation. [•] Hollow fiber membrane (HFM) reactor leads to a high mass transfer efficiency. [•] Syngas fermentation of Clostridium carboxidivoran P7 in HFM reactor was successfully established. [•] Syngas fermentation in HFM generated a higher ethanol titer than suspended culture. [•] Syngas flow rate and liquid recirculation rate are crucial for HFM operation. [ABSTRACT FROM AUTHOR]