Oxidation advanced processes for dairy phage inactivation. POSTER

JACOB, M. F.; BRIGGILER MARCÓ, M.; ALFANO, O.; QUIBERONI, A.; BALLARI, M. M.

Santa Fe

Workshop; French Argentinean Workshop on Heterogeneous Catalysis; 2023

INCAPE (UNL-CONICET)

The aim of this work was to investigate the inactivation of phages infective to lactic acid bacteria by diverse oxidation advanced processes, such as photocatalysis and photocatalytic paints. Assays were carried out in a laboratory scale reactor and a semi-pilot scale reactor, with phages deposited on plates or contained in air. Plaque forming units per mL against time were plotted and fitted with a first order regression. Photonic and quantum efficiencies were calculated. Photonic efficiencies were ranged from 2.84×10exp9 to 4.06×10exp12 PFU/Einstein for photocatalytic paints, from 3.63×10exp9 to 4.82×10exp12 PFU/Einstein for photocatalysis on plates and from7.65×10exp6 to 1.59×10exp7 PFU/Einstein for photocatalysis in air. Quantum efficiencies were ranged from 6.40×10exp9 to 9.17×1012 PFU/Einstein for photocatalytic paints, from 1.03×10exp11 to 1.37×10exp12 PFU/Einstein for photocatalysis on plates and from 2.66×10exp7 to 5.53×10exp7 PFU/Einstein for photocatalysis in air. These results showed the feasibility of the oxidation advanced processes in the inactivation of dairy phages. These technologies could be complemented with others already used, in order to decrease the risk of phage infections in dairy industry.