Table 1 List of different test runs, the according gaseous composition and the method used to maintain pO 2 *
From: Methods to optimize myxobacterial fermentations using off-gas analysis
Low O2 Moderate CO2 | Low O2 No CO2 | Moderate O2 Moderate CO2 | High O2 High CO2 | High O2 No CO2 | Moderate O2 High CO2 |
|---|---|---|---|---|---|
pO2 5%, | pO2 5%, | pO2 20%, | pO2 55%, | pO2 55%, | pO2 20%, |
CO2 0.3–0.6% | CO2 < 0.1% | CO2 0.2–0.3% | CO2 1.0–2.0% | CO2 < 0.1% | CO2 1.8% |
Shearing stress comparable to standard conditions | Shearing stress comparable to standard conditions | Standard conditions | Shearing stress comparable to standard conditions | Shearing stress comparable to standard conditions | New Method: Shearing stress dependent on stirrer speed |
Gaseous composition and pO2 regulated by aeration with ambient air | Gaseous composition and pO2 regulated by aeration with ambient air stripping of CO2 with nitrogen gas | Gaseous composition and pO2 regulated by aeration with ambient air | Gaseous composition and pO2 regulated by aeration with pure O2 | Gaseous composition and pO2 regulated by aeration with ambient air | Gaseous composition and pO2 regulated by aeration with ambient air |