Tertiary treatment using microfiltration and UV disinfection for water reclamation

Citation
D. Jolis et al., Tertiary treatment using microfiltration and UV disinfection for water reclamation, WAT ENV RES, 71(2), 1999, pp. 224-231
Citations number
31
Categorie Soggetti
Environment/Ecology,"Environmental Engineering & Energy
Journal title
WATER ENVIRONMENT RESEARCH
ISSN journal
10614303 → ACNP
Volume
71
Issue
2
Year of publication
1999
Pages
224 - 231
Database
ISI
SICI code
1061-4303(199903/04)71:2<224:TTUMAU>2.0.ZU;2-K
Abstract
Microfiltration and UV disinfection are two alternative technologies for wa ter reclamation. The results of a pilot study combining these two processes are presented. In addition to producing filtrate turbidities averaging 0.0 6 nephelometric turbidity units, microfiltration was an effective barrier t o pathogens, demonstrating average log reductions of 4.5 for total coliform s and 2.9 for MS2 bacteriophage. Ultraviolet disinfection following microfi ltration reliably met the California Wastewater Reclamation Criteria (Title 22) total coliform standard of 2.2 colony-forming units/100 mt at a UV dos e of 450 J/m(2). The MS2 bacteriophage standard, which requires a 5-log red uction, was achieved by microfiltration and a UV dose of 880 J/m(2). A mode l of the kinetics of inactivation of MS2 bacteriophage was used in further analysis of disinfection data. The model indicated that considerable backmi xing occurred in the pilot UV disinfection unit, and observed UV doses coul d be reduced with improved hydraulics.