TABLE 1.
Summary of growth yields for S. oneidensis strain MR-1 utilizing a variety of electron acceptors after 70 h in culturea
| Culture treatment | Concn of total cell carbon (μg liter−1) | Concn of e-reduced (mM)b | Growth (107 cells ml−1) | Growth per cell (10−14 g of C cell−1) | Yield (g of C mol of e−−1) |
|---|---|---|---|---|---|
| FeOOH | 1,600 ± 209 | 10.2 | 12.6 ± 0.3 | 1.3 | 0.169 |
| FeOOH + AQDS | 1,744 ± 244 | 24.0 | 14.7 ± 0.3 | 1.2 | 0.073 |
| Smectitec | 2.8 | 9.0 ± 0.4 | |||
| Smectite + AQDSc | 4.0 | 12.0 ± 0.3 | |||
| Fe(III) citrate | 10,885 ± 1,293 | 48.6 | 16.5 ± 0.7 | 6.6 | 0.198 |
| O2 | 25,490 ± 3,062 | 20.0 | 14.8 ± 0.2 | 17.2 | 1.29 |
a
Each value is the mean ± 1 standard deviation or the average from the same triplicate cultures per treatment presented in Fig. 2.
b
Average concentration of electron acceptor reduced measured in triplicate cultures. Oxygen utilization was calculated from the stoichiometry presented in Table 2, assuming complete utilization of the lactate added.
c
It was not possible to resolve cell carbon or yield in smectite cultures due to the presence of background carbon impurities.