Factors controlling sensitivity in ultraviolet disinfection of secondary effluents

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · J. - Water Pollut. Control Fed.; (United States)

OSTI ID:5492114

Qualls, R G; Ossoff, S F; Chang, C H; Dorfman, M H; Dumais, C M; Lobe, D C; Johnson, D

Evaluation of ultraviolet (UV) light disinfection must distinguish between the UV-sensitivity of the bacteria themselves and the difference between the UV intensity applied and that received by the organism caused primarily by UV-absorbing materials. Samples from a variety of wastewater effluents were irradiated in a simplified system where the factors controlling disinfection could be accurately measured. Total coliform survival was determined as a function of UV dose for both unfiltered and 10-..mu..m filtered effluent samples. Particles were counted by size class. Coliforms not associated with larger particles were only slightly less sensitive to UV light than cultured and purified E. coli. Particulate-associated coliforms were more resistant; resistance was determined by the number and size of suspended particles. At a UV dose of 26 mW x s/cm/sup 2/, survival was correlated best with the number of particles greater than 40 ..mu..m (r/sup 2/ = 0.55), suspended solids (r/sup 2/ = 0.55), and suspended solids removed by 10-..mu..m filtration (r/sup 2/ = 0.65).

• Research Organization: Univ. of Georgia, Athens
• OSTI ID: 5492114
• Journal Information: J. - Water Pollut. Control Fed.; (United States), Journal Name: J. - Water Pollut. Control Fed.; (United States) Vol. 57:10; ISSN JWPFA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
COMPARATIVE EVALUATIONS
CORRELATIONS
DOSE-RESPONSE RELATIONSHIPS
EFFICIENCY
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
IRRADIATION
LETHAL IRRADIATION
LIQUID WASTES
MANAGEMENT
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PERFORMANCE TESTING
PROCESSING
RADIATIONS
RESPONSE MODIFYING FACTORS
SEWAGE
SURVIVAL CURVES
SURVIVAL TIME
TESTING
ULTRAVIOLET RADIATION
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT