Kinetic Model of Bacteria Disinfection Employing UVC Radiation

MARISOL D. LABAS, CARLOS A. MARTÍN Y ALBERTO E. CASSANO

Buenos Aires

Congreso; Monitoring Systems and Novel Technologies for Detection / Removal of Pollutants in / from Ecosystems; 2004

Microbiological contamination of water has always been a problem of general concern. Among the proposed ways to deal with this type of pollution without difficulties associated with the use of chlorine, UV radiation is an established technology. This work presents a detailed kinetic study of the rate of removal of bacteria employing UV radiation (253.7 nm) under the following conditions: (i) the indicator microorganism is Escherichia coli, (ii) temperature is 20° C, (iii) four different irradiation levels (iv) the initial concentration of bacteria varies from 105 to 108 CFU cm-3, (v) two different culture medium are used and (vi) the concentration of the culture medium varies between 10-3Escherichia coli, (ii) temperature is 20° C, (iii) four different irradiation levels (iv) the initial concentration of bacteria varies from 105 to 108 CFU cm-3, (v) two different culture medium are used and (vi) the concentration of the culture medium varies between 10-35 to 108 CFU cm-3, (v) two different culture medium are used and (vi) the concentration of the culture medium varies between 10-3-3 to 10-6 g cm-3. The three last variations were introduced to simulate typical effluents from food industries and clean waters for domestic use.-6 g cm-3. The three last variations were introduced to simulate typical effluents from food industries and clean waters for domestic use.