TECNOLOGÍAS EMERGENTES PARA LA INACTIVACIÓN DE PSEUDOMONAS AERUGINOSA

FLORES MARINA; BRANDI RODOLFO; LABAS MARISOL

Cordoba

Congreso; VII CONGRESO INTERNACIONAL SOBRE GESTIÓN Y TRATAMIENTO INTEGRAL DEL AGUA; 2018

Universidad de Blas Pascal

Water is humanity´s most precious resource. and it is fundamental to satisfy basic human needs. Unsafe water from all sources contributes significantly to the global burden of disease, principally through the waterborne transmission of gastrointestinal infections and a wide range of agents that cause diarrhea and even death Within waterborne diseases, intestinal diseases, both bacterial and parasitic infections are indicators of environmental pollution and socio-economic and cultural factors. In response to this problem, in this research work different technologies for water disinfection are studied: innovative, accessible and envoronmentaly friendly. In this study we present the results of disinfection tests using emerging technologies, based on advanced oxidation processes, AOPs, (UV / Hydrogen Peroxide, UV / Peracetic Acid) and alternative disinfectants: Hydrogen Peroxide, Commercial Peracetic Acid (PAA) on an indicator organism of contamination as Pseudomonas aeruginosa.Experimental runs were carried out in a well-stirred, annular batch reactor with a total reaction volume of 2000 cm3 and with a UV germicidal lamp (Phillips TUV 15 W emitting at 254 nm) on its central axis. The reactor has provisions for sampling, pH and temperature measurements.Disinfection tests were performed using the commercial APA solution (1-5 ppm) at different contact times. The disinfectant action of hydrogen peroxide was studied as the only disinfectant agent at concentrations of 50-100 ppm.Once the disinfecting action of these agents was evaluated, they were studied incombination with germicidal UV radiation. Commercial PAA proved to be a powerfulbiocidal agent, exhibiting high inactivation doses (99.99%) at low contact time (300 seconds), while hydrogen peroxide showed to be a weak agent, achieving a 70% bacterial inactivation at 10000 seconds of reaction. The PAA / UV combination showed a 99.99% inactivation. APA / UV technology is presented as a promising alternative and ecology for water disinfection.