Advanced Oxidation Processes (AOP) for water disinfection: a comparative study.

FLORES MARINA; DALLA FONTANA AGUSTINA; BRANDI RODOLFO; CASSANO ALBERTO; LABAS MARISOL

Recife

Conferencia; Encontro sobre Aplicações Ambientais de Processos Oxidativos Avançados (EPOA).; 2013

Advanced oxidation processes (AOP) are characterized by a common chemical feature: the capability of exploiting the high reactivity of OH radicals in driving oxidation processes which are suitable for achieving the complete abatement of even less reactive pollutants. Few references were found, however, regarding the use of chemical oxidations for wastewater disinfection. In this study, laboratory experiments were conducted to compare the efficiency of using Peracetic Acid (PAA), PAA/UV and H2O2/UV-based advanced oxidation processes in water disinfection. The combined commercial PAA mixture + UV disinfection showed increased and even synergistic effects effectiveness. Our results show that 4 mg L-1 of a commercial mixture of PAA + UV are enough to produce more than 4 logs decrease in bacteria concentration in less than 7s working under clear water conditions. The combination of the two methods provides a promising approach to disinfection processes.