Table 1.
Parameters of biosurfactant production by the isolates using soybean oil as substrate (mean and standard deviation of three replicates), after the final 168 hours of cultivation.
| Parameters | Microorganisms | ||||||
|---|---|---|---|---|---|---|---|
| LBPF 1 | LBPF 3 | LBPF7 | LBPF 9 | LBPF 10 | LBPF 14 | LBPF 15 | |
| Dry biomass (g/L) | 12,22 | 18,91 | 16,78 | 9,55 | 12,31 | 16,2 | 13,8 |
| ±0,14 | ±0,04 | ±0,03 | ±0,04 | ±0,07 | ±0,5 | ±0,07 | |
| 9,13 | 13,86 ±0,11 | 7,98 | 3,0 | 4,4 | 4,2 | 4,9 | |
| BS1 (g/L) | ±0,02 | ±0,11 | ±0,13 | ±0,07 | ±0,10 | ±0,09 | ±0,10 |
| 0,75 | 0,73 | 0,48 | 0,31 | 0,36 | 0,26 | 0,4 | |
| Y p/b2(g/g) | ±0,01 | ±0,01 | ±0,01 | ±0,01 | ±0,01 | ±0,01 | ±0,01 |
| 39 | 38 | 39 | 32 | 39 | 37 | 39 | |
| TS3mN/m | ±0,82 | ±1,37 | ±0,98 | ±0,41 | ±0,75 | ±0,75 | ±0,52 |
| pH | 4,87 | 4,51 | 4,41 | 4,51 | 4,35 | 3,99 | 4,72 |
| ±0,21 | ±0,17 | ±0,1 | ±0,07 | ±0,08 | ±0,11 | ±0,08 | |
1
BS= biosurfactant;
2
Y p/b= coefficient of biosurfactant production yield versus cell concentrations;
3
TS= Surface tension