1. Microorganism and culture medium: Lactobacillus lactis-11, a lactic acid producing
strain, was grown on deMan Rogosa Sharpe (MRS) [21] medium.
2. Supports: The inorganic support materials are characterized in Table 1.
The support materials were used after being washed with deionized water and sterilized by
autoclaving for 25 min at 1 atm and 121 C.
|
Table 2 |
Characterization of support materials |
|
Support |
Form |
Company
|
Mean particle diameter (mm)
|
Mean pore diameter (µm) |
Specific surface area (m2 g-1) |
Porosity |
Density |
|
Macro-activated carbon |
Cylinder | Xinhuaa | 4–5 | 10–20 | ≥300 | C50 | 1.06 |
| Glass fiberb | Ball | Jiajiec | 20 | – | – | – | 0.21 |
| Ceramic | Bead | Xinquand | 1–2, 5–6 | 50–100 | ≥20, ≥5 | C53 | 0.89 |