Comparison and Validation of UV Dose Calculations for Low- and Medium-Pressure Mercury Arc Lamps

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Abstract:

A method for calculating UV dose for microbial disinfection that includes a measure of the wavelength-dependent factors of UV lamp output, quartz sleeve UV transmission, microbial action spectra, and wastewater UV transmission is presented. The method is validated by comparing UV dose–response curves for the disinfection of a secondary effluent achieved using collimated beams of UV light generated from low- and medium-pressure mercury arc lamps. The wastewater UV transmittance is artificially altered as part of the validation process. A simplified and practical method of UV dose calculation that relies only on a measure of the UV transmission at 254 nm is proposed for the disinfection of domestic wastewaters by mediumpressure lamps. The proposed method is validated using wastewater samples obtained from 21 wastewater treatment plants located across North America.

Keywords: COLLIMATED BEAM; GERMICIDAL DOSE; MEDIUM PRESSURE; UV DISINFECTION; WASTEWATER

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143000X137978

Publication date: July 1, 2000

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  • 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.
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