Tertiary treatment using microfiltration and UV disinfection for water reclamation

被引：14
作者：
Jolis, D [1 ]
Hirano, R [1 ]
Pitt, P [1 ]
机构：
[1] San Francisco Publ Util Commiss, Water Qual Div, Millbrae, CA 94030 USA
来源：
WATER ENVIRONMENT RESEARCH | 1999年 / 71卷 / 02期
关键词：
microfiltration; UV disinfection; water reclamation; kinetics; MS2; bacteriophage; reactor hydraulics;
D O I：
10.2175/106143098X121789
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Microfiltration and UV disinfection are two alternative technologies for water reclamation. The results of a pilot study combining these two processes are presented. In addition to producing filtrate turbidities averaging 0.06 nephelometric turbidity units, microfiltration was an effective barrier to pathogens, demonstrating average log reductions of 4.5 for total coliforms and 2.9 for MS2 bacteriophage. Ultraviolet disinfection following microfiltration reliably met the California Wastewater Reclamation Criteria (Title 22) total coliform standard of 2.2 colony-forming units/100 mt at a UV dose of 450 J/m(2). The MS2 bacteriophage standard, which requires a 5-log reduction, was achieved by microfiltration and a UV dose of 880 J/m(2). A model of the kinetics of inactivation of MS2 bacteriophage was used in further analysis of disinfection data. The model indicated that considerable backmixing occurred in the pilot UV disinfection unit, and observed UV doses could be reduced with improved hydraulics.
引用
收藏
页码：224 / 231
页数：8
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