Figure 8

Analysis of substrate efficiency. Eight representative electron donors (acetate, glycolate, lactate, fumarate, benzoate, citrate, glucose, and cellobiose) were used in simulations of R. ferrireducens growth under donor-limiting conditions with Fe(III) as electron acceptor. The biomass yield to electron donor (gdw/mol substrate) and the Fe(III):substrate ratio from simulation results of R. ferrireducens growth on acetate were set at 1. The biomass yields to other donors and the ratios of Fe(III) to other electron donors are expressed in comparison to that of acetate.