文档介绍：UV enhanced chlorination of sewage
against “tailing” phenomenon
Yong-mei LIANG,Chao-bin LIU, Zheng-bo Sun Yat-sen university
MA,Jun HE, Ya-liang ZHOU, Jin-chan CHEN, XingangxiRoad 135,
Wei LIU* Guangzhou,510275,
School of Environmental Science and E-mail:******@.;Fax:86-20-39
Engineering, 332690
Abstract: Combined disinfection with UV radiation of coliphage MS2 by 2-3 times (Shang et al,
and chlorination was investigated to reduce the 2007). Both the UV pre-treatment and the
tailing extent in chlorination of secondary effluent. simultaneous exposure in the first disinfection
Impacts of exposure sequences to UV and stage also enhanced the secondary
chlorination, pH, dosage of chlorine and UV dose on log-inactivation by chlorination by 2-5 times, as
ic curves of E. coli was evaluated. pared to the inactivation without UV
solids significantly affect the extent of “tailing” irradiation (Liu et al, 2004).
phenomenon. Reduction of SS considerably
increased the log-kill in tailing region. Combined This paper investigated the weakening effect
disinfection with UV radiation and chlorination on “tailing” phenomenon in disinfection of
substantially increased the disinfection rate by secondary effluent bined of UV
- times in fast-order region, and irradiation and chlorination. The impacts of
consequently increased the log-k