Kinetic analysis of photosynthetic growth, hydrogen production and dual substrate utilization by Rhodobacter capsulatus

► 30 °C is optimum for hydrogen production at all light intensities. ► Lowest amount of hydrogen was produced 38 °C for all light intensities. ► Lactic acid is the preferred substrate in the system. ► Lactic acid was consumed by first order kinetics. ► A shift from zero to first order was observed in acetic acid consumption kinetics.