Fermentative production of ethanol from syngas using novel moderately alkaliphilic strains of Alkalibaculum bacchi

► Alkalibaculum bacchi strains CP11T, CP13 and CP15 make ethanol from CO, H2 and CO2. ► CP11T, CP13 and CP15 are moderately alkaliphilic strains grow at pH about 8.0. ► CP15 is the most promising strain due to its high growth and ethanol yield. ► Ethanol yields from utilized CO by CP15 were between 65% and 76%.