Table 1.

Hydrogen yields, pH and COD balance from batch experiments with C5 and C6-sugars.

Substrate	Z/I (g g−1)	Hydrogen yielda (mmol mmol−1)	pHb	COD balanceb (%)
Glucose (12.5 mM) Arabinose (12.5 mM)	0.26	0.62 ± 0.04	5.77 ± 0.1	110 ± 6
	0.13	0.54 ± 0.05	5.75 ± 0.1	94 ± 3
	0.065	0.59 ± 0.05	5.71 ± 0.1	93 ± 2
	0 (control)	0.49 ± 0.003	5.77 ± 0.1	84 ± 1

The results are the average and standard deviations for duplicate assays.

^ammol of hydrogen produced per mmol of sugar consumed.

^bAt the end of the batch experiment.