UV inactivation of pathogenic and indicator microorganisms

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Appl. Environ. Microbiol.; (United States)

OSTI ID:5148753

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

Survival was measured as a function of the dose of germicidal UV light for the bacteria Escherichia coli, Salmonella typhi, Shigella sonnei, Streptococcus faecalis, Staphylococcus aureus, and Bacillus subtilis spores, the enteric viruses poliovirus type 1 and simian rotavirus SA11, the cysts of the protozoan Acanthamoeba castellanii, as well as for total coliforms and standard plate count microorganisms from secondary effluent. The doses of UV light necessary for a 99.9% inactivation of the cultured vegetative bacteria, total coliforms, and standard plate count microorganisms were comparable. However, the viruses, the bacterial spores, and the amoebic cysts required about 3 to 4 times, 9 times, and 15 times, respectively, the dose required for E. coli. These ratios covered a narrower relative dose range than that previously reported for chlorine disinfection of E. coli, viruses, spores, and cysts.

• Research Organization: Univ. of North Carolina, Chapel Hill
• OSTI ID: 5148753
• Journal Information: Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 6; ISSN AEMID
• Country of Publication: United States
• Language: English

Related Subjects

560131* -- Radiation Effects on Microorganisms-- Basic Studies-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMOEBA
ANIMALS
BACILLUS
BACILLUS SUBTILIS
BACTERIA
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
DISINFESTATION
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
ESCHERICHIA COLI
INVERTEBRATES
MICROORGANISMS
PARASITES
POLIO VIRUS
PROTOZOA
RADIATION EFFECTS
RADIATIONS
SALMONELLA
SARCODINA
SHIGELLA
SIMIAN VIRUS
STAPHYLOCOCCUS
STERILIZATION
STREPTOCOCCUS
ULTRAVIOLET RADIATION
VIRUSES