Abstract
Photoreactivation of microorganism following UV disinfection is one the research topics for assessing the performance of UV disinfection, because there is little consensus on how the visible light intensity relates to the photoreactivation rate and the maximum survival in wastewater treatment processes.
Obvious photoreactivation by a fluorescent lamp was observed in the case of indicator bacteria (heterotrophic bacteria, coliform bacteria, fecal coliform) in raw sewage, but not E. coli B and E. coli K12 A/λ.(F+). Inactivation of fecal coliform was observed simultaneously during photoreactivation process by sunlight.
Dose rate at 360nm wave length as visible light intensity showed it to be an useful good indicator for assessing the photoreactivation rate and the maximum survival by both of the fluorescent lamp and sunlight.
