Influence of Fe2+ and Fe3+ on the Performance and Microbial Community Composition of a MFC Inoculated with Sulfate-Reducing Sludge and Acetate as Electron Donor
Table 3
Results obtained from the batch tests for each MFC with Fe2+ and Fe3+ inoculated with sludge and from the abiotic controls.
Days
Sulfate (mg/L)
Sulfate reduction (%)
HS-(mg/L)
Iron (Fe2+/Fe3+) (10 mM)
COD (mg/L)
COD removal (%)
pH
Voltage (V)
MFC with (inoculum) sludge and Fe3+
0
0
4.5
0.184
15
No Fe2+ detected as a result of Fe3+ reduction
7.4
0.360
MFC with (inoculum) sludge and Fe2+
0
4.2
0.452
15
The Fe2+ was not detected in the anolyte of the MFC
7.4
0.647
MFC abiotic with Fe3+
15
—
0
0
10 mM
—
0
4.5
0.158
MFC abiotic with Fe2+
15
—
0
0
10 mM
—
0
4.5
0.120
The results presented correspond to the of duplicate samples. 10 mM (0.56 g/L).