The following treatments were applied: 0 (control), 2.37, 6.22, 8.29 and 12.14 kJ m2 UV-C; NEWþ
6.22 kJm2; AEW þ 6.22 kJm2; O3 þ 6.22 kJm2. The UV-C dose to be combined with NEW, AEW and O3 was selected according to results reached in the preliminary experiments.