Table 7 Effect of incubation period on lactic acid production using immobilized cells (Enterococcus faecalis-58 and Enterococcus hirae-68)
Incubation period (h) | Number of runs | Lactic acid (g/l) (mean ± SD) | Consumed sugar (g/l) | Yield (%) | Efficiency (%) |
|---|---|---|---|---|---|
24 | (1–18) 18 | 6.82 ± 0.12–8 ± 0.3 | 11.4–13.8 | 60–58 | 23–28 |
36 | (1–3) 3 | 10.1 ± 0.1–11 ± 0.2 | 15.2–16.7 | 66–66 | 30–33 |
(4–7) 4 | 16.3 ± 0.3–17 ± 0.4 | 21.2–22.8 | 77–75 | 42–46 | |
(8–10) 3 | 28 ± 0.4–30 ± 0.45 | 33.8–36.4 | 83–82 | 68–78 | |
(11–18) 8 | 34 ± 0.09–35 ± 0.11 | 39.2–41.5 | 87–84 | 78–83 | |
72 | (1–2) 2 | 12.88 ± 0.12–14 ± 0.39 | 17.92–20 | 72–70 | 36–40 |
(3–9) 7 | 36.3 ± 0.3–37 ± 0.33 | 42.1–43.2 | 86–86 | 84–86 | |
(10–18) 9 | 36.82 ± 0.11–38 ± 0.11 | 42.9–44.5 | 86–85 | 86–89 | |
96 | (1–18) 18 | 29.03 ± 0.03–31 ± 0.08 | 34.1–37.6 | 85–82 | 68–75 |
LSD at 0.05 | 0.327 |