Experimental and model results for experiment 2. Experimental results: (A) Liquid concentrations: Glucose (asterisks), acetic acid (open squares), cell mass (open circles), lactic acid (open diamonds). (B) Accumulated H2 production (open circles). Model results: Average values were used for all parameters except μmax. For μmax, a value of 0.25/hour was used. (A) Liquid concentrations: Glucose (solid lines), acetic acid (dashed-dotted lines), cell mass (dotted lines), lactic acid (dashed lines). (B) Accumulated H2 production (straight lines).