In this study, three different inocula, anaerobic sludge (AS), anaerobic digestate (AD), and cow manure (CM), were evaluated for their CO conversion capabilities. The CM was collected from Hofmansgave Slot Cow Farm, the AD from Midtfyn Biogas Plant, and the AS from Ejby Møller Wastewater Treatment Plant (WWTP), all located in Funen, Denmark. These inocula were also processed as nutrient sources by centrifugation and sieving through a 0.125 mm mesh. Table provides a detailed overview of the characteristics of each inoculum and the nutrient media.