Dramatic enhancement of solar disinfection (SODIS) of wild Salmonella sp. in PET bottles by H2O2 addition on natural water of Burkina Faso containing dissolved iron

FREDERIC SCIACCA; JULIÁN ANDRÉS RENGIFO-HERRERA; JOSEPH WÉTHÉ; CESAR PULGARIN

CHEMOSPHERE

Elsevier

Lugar: Amsterdam; Año: 2010 vol. 78 p. 1186 - 1191

0045-6535

Disinfection of surface water containing dissolved iron (0.3 mg L-1) at natural neutral pH (~7.5) was carried out via Solar Disinfection (SODIS) treatment in PET bottles with H2O2 (10 mg L-1). Wild coliforms and Salmonella sp. were monitored for 6 h of sunlight irradiation and 72 h of dark post-treatment period. In our conditions SODIS treatment could not avoid Salmonella sp. re-growth during dark storage, meanwhile the addition of 10 mg L-1 of H2O2 showed a strong enhancement of the inactivation rate without any re-growth of both bacteria. Finally, total coliforms (Escherichia coli included) demonstrated to be an inappropriate indicator for monitoring bacterial contamination in water during solar disinfection processes.