title: [Photoreactivation of Escherichia coli and Enterococcus faecalis in the secondary effluent disinfected by UV-TiO2].
abstract: Effects of photoreactivating light intensity (0-41 microW x cm(-2)) on photoreactivation of Escherichia coli (E. coli) and Enterococcus faecalis (E. faecalis) in the secondary effluent after UV and UV-TiO2 disinfection were investigated. The results indicated that the disinfection efficiency of UV-TiO2 was much higher than that of UV disinfection. The photoreactivation rate of E. coli was much higher in UV disinfection than that in UV-TiO2 disinfection. Under high light intensity in UV-TiO2 disinfection, high resurrection rate can be induced. However, a higher resurrection rate can be introduced even under low light intensity in the UV disinfection. Meanwhile, UV-TiO2 disinfection had a strong inhibition effect on E. faecalis photoreactivation, when the light intensity was lower than 21 microW x cm(-2), three was no resurrection occurred on E. faecalis after 72 h resurrection irradiation, only under a strong photoreactivating light intensity, the resurrection rate of E. faecalis was observed.
authors.forename: Xi-Feng
authors.initials: XF
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Gong
authors.forename: Xiao-Lian
authors.initials: XL
authors.lastname: Hu
authors.forename: Bo-Zhi
authors.initials: BZ
authors.lastname: Ren
mesh_terms: D004202:Disinfectants / Q000737:chemistry; D004203:Disinfection / Q000379:methods*; D013293:Enterococcus faecalis / Q000254:growth & development / Q000528:radiation effects*; D004926:Escherichia coli / Q000254:growth & development / Q000528:radiation effects*; D008027:Light; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D004202:Disinfectants; C009495:titanium dioxide; D014025:Titanium