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| Disinfection stage | Sanitizer residue removal stage |
|---|---|
| Tap water (control) 150 s | |
| 2 mg L−1 AO 150 s | |
| 100 mg L−1 free chlorine 120 s | Tap water 30 s |
| 1% LA 120 s | Tap water 30 s |
| 1% LA 90 s | 1 mg L−1 AO 30 s |
| 1% LA 90 s | 2 mg L−1 AO 30 s |
LA, lactic acid; AO, aqueous ozone.
