Bacteria disinfection with hydrogen peroxide

M.L. LABAS; C.S. ZALAZAR; R.J. BRANDI; A.E. CASSANO

4th Conference on Oxidation Technologies for Water and Wastewater Treatment

Springer-Verlag

Lugar: Clausthal-Zellerfeld; Año: 2006; p. 665 - 670

Disinfection of water contaminated with Escherichia coli bacteria employing hydrogen peroxide at ambient temperature was studied in a perfectly mixed batch reactor. Experimental data were properly described employing modified expressions of the Series-Events and Multi-Target models. Moreover, it was found that at concentrations greater than 100 ppm the usually reported shoulder in the conventional diagram of bacteria concentration versus time was greatly reduced. Important to note is that the found reaction order with respect to the hydrogen peroxide concentration was different than one. For concentrations of H2O2 above 100 ppm the process shows encouraging results. Down from 40 ppm of hydrogen peroxide concentration the effectiveness decreases below acceptable limits. With the proposed changes in the models the developed kinetics can be used with confidence for designing large scale applications.