Cao et al. (2009) pointed out that the low concentration of oxygen
in solution would not have substantially contributed to current
generation, and when dissolved oxygen concentrations below
2mg L1 substantially reduce current generation. From formula
(1) and the concentrations of DO in Fig. 3b, which showed O2 consumption
at the beginning, it can be seen that the MFC bioelectricity
production was restricted from 12 h, without active aeration