Fig. 9
From: Potential of Zymomonas mobilis as an electricity producer in ethanol production
Maximum power densities and time needed to reach WV peaks (Tmax) in different treatment methods (N: no treatment, T: addition of Tween 80, C: addition of c-type cytochrome, B: biofilm removal). The combination of these letters means the cooperation of various methods and the black line on the top of the figure stands for the biomass of different treatment methods. p values were calculated between groups with and without treatment to compare the difference of electricity performance (*p value < 0.05; **p value < 0.01)