OCV of MFC increased with increasing initial C. vulgaris inoculums
from 50 to 150 mg L1, however, the bioelectricity generation
capacity of MFC decreased slightly with initial concentrations from
150 to 250 mg L1. The results implied that optimal inoculum density
of C. vulgaris for electricity production was 150 mg L1. Major
reason for this phenomenon was that a high initial algal inoculum
density of C. vulgaris resulted in self-shading and an accumulation
of auto-inhibitors in very dense cultures (Lau et al., 1995).