TABLE 3.
Biomass and lipid yield of S. obliquus in MSST and FP discharges with or without PL supplementation on day 21 of incubationa
| PL concn (g liter−1) or discharge category | Biomass (g liter−1) |
Lipid yield (mg liter−1)b |
||
|---|---|---|---|---|
| MSST | FP | MSST | FP | |
| N 11 (control) | 1.1 ± 0.1a | 1.0 ± 0.1b | 122.1 ± 1.8a (11) | 123.2 ± 2.0a (12) |
| Waste discharge | 1.4 ± 0.2b | 0.6 ± 0.1a | 207.2 ± 2.5c (13) | 110.1 ± 1.7a (19) |
| 5 | 1.8 ± 0.2c | 1.6 ± 0.2c | 287.1 ± 2.6e (16) | 279.3 ± 2.7e (17) |
| 10 | 1.8 ± 0.2c | 1.7 ± 0.2c | 236.3 ± 2.1d (13) | 228.6 ± 2.6d (14) |
| 15 | 2.2 ± 0.2d | 2.0 ± 0.2d | 165.8 ± 1.8b (8) | 189.1 ± 2.4c (10) |
| 20 | 2.1 ± 0.2d | 1.9 ± 0.2d | 106.6 ± 2.3a (5) | 137.1 ± 1.8b (7) |
a
Values represent averages ± standard errors of data based on three independent determinations. Values followed by the same letter did not differ significantly, as determined by Duncan's multiple-range test (P < 0.05). A separate analysis was done for each column.
b
Values in parentheses represent lipid content percentages determined on the basis of percent dry cell weight.