Water disinfection with UVC and/or chemical inactivation. Mechanistic differences, implications and consequences

FLORES, M. J.; BRANDI, R. J.; CASSANO, A. E.; LABAS, M. D.

Advanced Oxidation Processes”, Serie: SUSTAINABLE ENERGY DEVELOPMENTS.

CRC Press / Balkema

Año: 2012;

In the latest advances in water purification and disinfection, mainly in the oxidation of toxic organic compounds, persistent and cumulative, are used the new technologies of Advanced Oxidation Process (APOs), which are methods that involved chemical or photochemical generation and use of species transitional powerful as the hydroxyl radical (OHÿ). This work contains a comprehensive, albeit reduced, report on some of the processes in use, the kinetic modeling that accompany several of them and the theories behind those proposals, especially when they have been developed by us, in relation to technologies for water disinfection. Five disinfection methods were compared: (i) UV disinfection, (ii) Hydrogen peroxide disinfection, (iii) Peracetic acid disinfection (iv) Peracetic acid + UV disinfection and (v) Hydrogen peroxide + UV disinfection. The main target of the study was try to understand and interpret the differences that exist between the different procedures. In addition, we were searching for quantitative information in order to get an idea, as approximate as possible, about operating conditions and final results, with the aim of being able to distinguish among them, which might be the most efficient, economical and environmentally friendly method.