Artículos de revistas
Solar disinfection of wild Salmonella sp. in natural water with a 18 L CPC photoreactor: detrimental effect of non-sterile storage of treated water
Fecha
2011-05-05Registro en:
Sciacca, Frédéric ; Rengifo Herrera, Julian Andres; Wéthé, Joseph ; Pulgarin, Cesar; Solar disinfection of wild Salmonella sp. in natural water with a 18 L CPC photoreactor: detrimental effect of non-sterile storage of treated water; Elsevier; Solar Energy; 85; 7; 5-5-2011; 1399-1408
0038-092X
Autor
Sciacca, Frédéric
Rengifo Herrera, Julian Andres
Wéthé, Joseph
Pulgarin, Cesar
Resumen
For the first time solar disinfection of liters of water containing wild Salmonella sp. and total coliforms was carried out in a compound parabolic collector (CPC) photoreactor at temperatures of almost 50 C. Using surface water with high turbidity, this treatment was efficient in completely inactivating Salmonella sp. without regrowth during the subsequent 72 h of dark sterile storage. However if the solar treated water is poured in a non- sterile container, bacteria regrowth occurs even if 10 mg L1 of H2O2 is added before the storage. On the other hand, 30 mg L1 of H2O2 added when the irradiation started was completely depleted within 2 h and did not prevent bacterial regrowth during post-irradiation storage in non-sterile containers, demonstrating that storage of large volumes of water treated by solar
irradiation was not optimal. Finally, total coliforms (Escherichia coli included) showed a far higher sensitivity than Salmonella sp. and demonstrated to be an inappropriate indicator for monitoring bacterial contamination in water during solar disinfection processes.