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Title: Tertiary treatment using microfiltration and UV disinfection for water reclamation

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 turbidites 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 mL at a UV dose of 450 J/m{sup 2}. The MS2 bacteriophage standard, which requires a 5-log reduction, was achieved by microfiltration and a UV dose of 880 J/m{sup 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.
Authors:
; ;
Publication Date:
OSTI Identifier:
346822
Resource Type:
Journal Article
Resource Relation:
Journal Name: Water Environment Research; Journal Volume: 71; Journal Issue: 2; Other Information: PBD: Mar-Apr 1999
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; WASTE WATER; WATER RECLAMATION; WATER TREATMENT; ULTRAVIOLET RADIATION; MATHEMATICAL MODELS; WATER TREATMENT PLANTS