| Applic Level | Sterilisation Effects of UV | Type and Size of Pathogens | UV Dose (intensity x exposure time) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Small | To | Large | mJ/ cm2 |
MWsec/ cm2 |
µWsec/ cm2 |
Flow Rate m3 |
||||
| Virus | Bacteria | Algae | Yeast | Protozoan | ||||||
| 1 | Controlled | Some sp. | Many sp. | Many sp. | Some sp. | No | <10 | <10 | <10 000 | >6m3/hr |
| 2 | De-activated | Some sp. | Most sp. | Most sp. | Many sp. | No | 15 | 15 | 15 000 | 4m3/hr |
| 3 | De-activated | Many sp. | Most sp. | Most sp. | Most sp. | Some sp. | 30 | 30 | 30 000 | 2m3/hr |
| 4 | Lethal | Most sp. | Most sp. | Most sp. | Most sp. | Some sp. | 100 | 100 | 100 000 | 0.6m3/hr |
| 5 | Lethal | Most sp. | Most sp. | Most sp. | Most sp. | Many sp | 200 | 200 | 200 000 | 0.3m3/hr |