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An ultraviolet (UV) disinfection system was assessed in terms of the most stringent U.S. wastewater reuse standards. The UV inactivation of total and fecal coliform bacteria and seeded MS2 coliphages in filtered activated sludge effluent was tested continuously for 22 weeks. The most
stringent coliform criterion, that the 7-day median not exceed 2.2 per 100 mL, was met consistently in effluent exposed to an average UV dose of 168 and 112 mW/cm2 · s for total and fecal coliforms, respectively. MS2 coliphages were more resistant to UV disinfection than
the coliform group. Both the point source summation (PSS) and bioassay methods were used to estimate UV dose in the system. For a 95% confidence interval, the PSS method resulted in an equivalent estimate of UV dose when compared with the bioassay method.
Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.