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. 2017 Jul 20;8:1371. doi: 10.3389/fmicb.2017.01371

FIGURE 1.

FIGURE 1

Maximum current density profile in duplicate MECs fed with low and high concentrations of acetate and propionate. (A) MECs fed with low substrate concentration; (B) MECs fed with high substrate concentration. Arrows indicate anode biofilm sampling for DNA extraction. Each data point represents the average (duplicate reactors) of the maximum current density recorded in each batch test.