| Autor: |
Wang, Xi-feng, Hu, Xiao-lian, Gong, Xin, Ban, Yun-xiao |
| Zdroj: |
Journal of Central South University; Dec2016, Vol. 23 Issue 12, p3115-3121, 7p |
| Abstrakt: |
The disinfected bacteria will be a photoreactivation under the irradiation of the sunlight, and the light intensity plays an important role in the bacteria resurrection. The effect of light intensity on photoreactivation of Escherichia coli ( E. coli) and Enterococcus faecalis ( E. faecalis) in secondary effluents which were disinfected respectively by pure UV and UV-TiO was investigated. The results show that the disinfection efficiency of UV-TiO is much higher than that of the pure UV disinfection. The photoreactivation rate of E. coli is much higher in pure UV disinfection than in UV-TiO photocatalytic disinfection. Under high light intensity in UV-TiO disinfection, high resurrection rate can be induced. However, a higher resurrection rate can be introduced even under low light intensity in pure UV disinfection alone. Meanwhile, UV-TiO disinfection has a strong inhibition effect on E. faecalis photoreactivation. When the light intensity is lower than 21 μW/cm, nearly no resurrection of E. faecalis occurs after 72 h resurrection irradiation, and a little resurrection rate is observed only under a strong photoreactivating light intensity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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