Membrane-assisted extractive butanol fermentation by Clostridium saccharoperbutylacetonicum N1-4 with 1-dodecanol as the extractant

► Separation with PTFE membrane enables to use 1-dodecanol as an extractant. ► Extraction of butanol with 1-dodecanol reduced efficiently the growth inhibition. ► PTFE membrane-assisted extraction exhibited high butanol productivity per area.