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Microbiological disinfection of water and air by photocatalysis

2007; Elsevier BV; Volume: 11; Issue: 1-2 Linguagem: Inglês

10.1016/j.crci.2007.06.007

1878-1543

C. Guillard, Thu-Hoai Bui, Caroline Félix, Vincent Moulés, Bruno Lina, Philippe Lejeune,

Advanced Photocatalysis Techniques

This article is aimed at presenting (i) a fundamental research on the efficiency of photocatalysis in water disinfection and (ii) the efficiency of a photocatalytic prototype, developed by Buxair firm, to remove avian influenza virus in air. In water disinfection, two model strains of Escherichia coli (K12 PHL849 and K12 PHL1273) were selected and a comparison of the efficiencies of TiO2 Degussa P-25 versus TiO2 Millennium PC500 were estimated. A more important inactivation of E. coli PHL1273 was obtained on TiO2 Millennium PC500, in line with its better adherence on this solid. An experimental study was performed using a dialysis membrane to investigate the impact of the contact between the microorganisms and the photocatalyst and to determine the role of H2O2 generated in situ. In air disinfection, a total inactivation of virus A/H5N2, close to avian influenza virus A/H5N2, was obtained in a single pass in the Buxair® gas phase dynamic photoreactor using a contaminated air flow rate of 40 m3/h.