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[Use of UV radiation for the disinfection of water. V. Microbiological studies of the behavior of bacterial cells from the logarithmic and from the stationary phase in cold and warm drinking water].
- Source :
-
Zentralblatt fur Hygiene und Umweltmedizin = International journal of hygiene and environmental medicine [Zentralbl Hyg Umweltmed] 1990 Oct; Vol. 190 (4), pp. 380-94. - Publication Year :
- 1990
-
Abstract
- The u.v.-susceptibility of E. cloacae, E. coli and E. faecium was tested with a flow-through u.v. light treatment apparatus. Drinking water of three ranges of temperature (ca. 13 degrees C, ca. 33 degrees C, and ca. 48 degrees C) was used. The u.v.-susceptibility was tested with bacteria harvested in the exponential phase of growth as well as with bacteria harvested in the stationary phase. In all ranges of temperature and both phases of growth reductions of at least 99.9999% of E. cloacae and E. coli were obtained by a dosage of less than or equal to 25 mWs/cm2. For E. faecium harvested in the exponential phase of growth this could be confirmed in cold water of 13 degrees C, while in warm water of 48 degrees C a dosage of ca. 47 mWs/cm2 for a reduction of 99.9999% was necessary. To kill E. faecium-cells, which were harvested in the stationary phase, dosage between 39 and 45 mWs/cm2 were necessary in water of the three ranges of temperature.
- Subjects :
- Bacteria growth & development
Colony Count, Microbial
Drinking
Enterobacter growth & development
Enterobacter radiation effects
Escherichia coli growth & development
Escherichia coli radiation effects
Streptococcus growth & development
Streptococcus radiation effects
Temperature
Bacteria radiation effects
Disinfection methods
Ultraviolet Rays
Water Microbiology
Subjects
Details
- Language :
- German
- ISSN :
- 0934-8859
- Volume :
- 190
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Zentralblatt fur Hygiene und Umweltmedizin = International journal of hygiene and environmental medicine
- Publication Type :
- Academic Journal
- Accession number :
- 2080969