Comparison of ultraviolet disinfection with chemical disinfe
| Item | UV | Chemical disinfectant | Ozone |
| Property | Physical | Chemical | Chemical |
| Cost | Low | Medium | High |
| Maintenance cost | Low | Medium | High |
| Maintenance frequency | Low | Medium | High |
| Germicidal | Excellent | Normal | Excellent |
| Contact Time | 1-5s | 30-50min | 15-30min |
| Chemical change after disinfection | No | Yes | Yes |
| Residual | No | Yes | Yes |
* Chemical disinfectants include chlorine, sodium hypochlorite, calcium hypochlorite, chlorine dioxide and bromide.
