Table 4.
Hydrocarbon removal efficiency of HDB8, HDB9, and HDB18, with different nitrogen sources, NH4NO3, NH4Cl, and NaNO3. Results are averages of 3 culture replicates and 3 separate GC analyses.
| Isolate | NH4NO3 | NH4Cl | NaNO3 |
|---|---|---|---|
| HDB8 | |||
| Total hydrocarbons removal (%) | 30 ± 3.1 | 31 + 2.4 | 6 ± 0.3 |
| LMW hydrocarbons (%) | 39 ± 4.9 | 28 ± 3.7 | 0 ± 1.2 |
| MMW hydrocarbons (%) | 29 ± 3.9 | 33 ± 2.6 | 3 ± 1.7 |
| HMW hydrocarbons (%) | 24 ± 4.6 | 29 ± 4.0 | 14 ± 2.4 |
| HDB9 | |||
| Total hydrocarbons removal ( %) | 21 ± 2.5 | 8 ± 1.3 | 3 ± 1.0 |
| LMW hydrocarbons (%) | 35 ± 4.1 | 11 ± 2.6 | 0 ± 0.5 |
| MMW hydrocarbons (%) | 21 ± 3.9 | 5 ± 1.7 | 0 ± 0.5 |
| HMW hydrocarbons (%) | 6 ± 2.9 | 9 ± 1.2 | 9 ± 1.6 |
| HDB18 | |||
| Total hydrocarbons removal (%) | 10 ± 2.9 | 19 ± 1.6 | 3 ± 0.8 |
| LMW hydrocarbons (%) | 16 ± 3.0 | 33 ± 1.7 | 8 ± 2.2 |
| MMW hydrocarbons (%) | 14 ± 1 | 22 ± 2.5 | 0 ± 0.5 |
| HMW hydrocarbons (%) | 4 ± 0.6 | 2 ± 1.2 | 0 ± 0.2 |
LMW: low molecular weight; MMW: medium molecular weight; HMW: high molecular weight.