Fig. 4From: The effects of CO2 and H2 on CO metabolism by pure and mixed microbial culturesFermentation of CO in a batch membrane reactor with continuous CO supply in phosphate-buffered medium. a H2, CO2, and CO measured in the headspace, and acetate and ethanol concentrations in the liquid phase. b pH values over time. c Relative abundance of main phylotypes detected during fermentation. The data in a, b are averages of at least two measurementsBack to article page