The operation of MFCs in continuous flow mode improved performance relative to power generation, compared to fed-batch conditions.For example, the maximum power densities at 30 C were 26% higher than those in fed-batch tests. As expected, operation of
the reactors under mesophilic conditions also increased power output, compared to those obtained under ambient conditions.Power densities were increased by 22% by operation at 30 C compared to 23 C under continuous flow conditions. This effect of temperature is different from those observed using acetate or butyrate as a substrate (Table 1). With acetate or butyrate there was little effect of temperature on power densities (0.7–1.4%). In
contrast, there was an effect of temperature for propionate. T