Table 2.
Anode biofilm structure as a function of the electron donor
| Electron donor | Total biomass (μm3/μm2) | Average thickness (μm) | Roughness coefficient (0 to ∞) | Surface-to-vol ratio (μm2/μm3) | Substratum coverage (%) |
|---|---|---|---|---|---|
| Acetate | 25.8 ± 3.2 | 26.7 ± 3.9 | 0.1 ± 0.1 | 0.8 ± 0.3 | 99.9 ± 0.1 |
| Formate | 13.7 ± 1.9 | 21.7 ± 4.1 | 0.3 ± 0.1 | 1.9 ± 0.4 | 75.0 ± 12.2 |
| Lactate | 13.0 ± 3.8 | 16.0 ± 3.6 | 0.2 ± 0.1 | 1.6 ± 0.7 | 91.0 ± 7.6 |
| H2 | 2.9 ± 0.6 | 10.2 ± 3.3 | 1.0 ± 0.2 | 2.0 ± 0.4 | 37.2 ± 9.2 |
| Formatea | 25.5 ± 8.4 | 26.9 ± 9.4 | 0.2 ± 0.1 | 0.9 ± 0.3 | 99.3 ± 0.6 |
| Lactatea | 17.9 ± 3.6 | 18.9 ± 2.7 | 0.1 ± 0.1 | 1.2 ± 0.7 | 97.2 ± 3.9 |
a
Supplemented with 0.1 mM acetate.