Figure 2From: A comprehensive and quantitative review of dark fermentative biohydrogen productionA graphical overview of the utilization of glucose is presented. HER of Clostridiaceae (A), Enterobacteriaceae (B) and Thermoanaerobacterales (Family III) (C) is shown in relation to the Y (H2/S) . The qH 2 of Clostridiaceae (D), Enterobacteriaceae (E) and Thermoanaerobacterales (Family III) (F) in relation to the Y (H2/S) is also presented. These results are depicted irrespective of the medium composition, cultivation conditions or genetic modification. These graphs offer an indication that Clostridiaceae and Enterobacteriaceae show a higher volumetric productivity than Thermoanaerobacterales (Family III). In respect to the qH2Clostridiaceae and Thermoanaerobacterales (Family III) show higher productivity than Enterobacteriaceae. Based on the Y(H2/S) following ranking is presented: Thermoanaerobacterales (Family III) >  Clostridiaceae >  Enterobacteriaceae.Back to article page