1. |
Sudden change in feed substrate concentration |
2000 |
2. |
Change in coolant temperature |
2000 |
3. |
Agitator power drop |
1600 |
4. |
Aearation rate drop |
1600 |
5. |
Gradual change of feed rate |
1200 |
6. |
Gradual dissolved oxygen sensor drift |
2000 |
7. |
Feed temperature change |
1600 |
8. |
pH sensor drift |
1600 |
9. |
Non-functional pH control |
1200 |
10. |
Reduced pH control |
1200 |
11. |
Reactor temperature sensor bias |
1200 |
12. |
Reactor temperature sensor drift |
1600 |
13. |
Reduced temperature control |
1200 |
14. |
Reduced temperature control - maximal flow not impacted |
1200 |
15. |
Contamination |
1000 |