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2009 | 115 | 6 | 1092-1094
Article title

Critical Comparison between the Pulsed Electric Field and Thermal Decontamination Methods of Hospital Wastewater

Content
Title variants
Languages of publication
EN
Abstracts
EN
Filtered wastewater samples were inoculated with Enterococcus faecium and exposed to different pulsed electric field (PEF) treatment energies at 40, 50 and 60°C. A lethal effect of heat treatment on E. faecium can be observed for T > 56°C and a heating duration of 4 min. A treatment with 60°C, 4 min, provokes a bacterial reduction of 4 log. A combined treatment of inoculated wastewater samples with pulsed electric field and heat (40, 50 and 60°C) reduced the bacterial contamination considerably. At a suspension temperature of 60°C pulsed electric field inactivation resulted in a complete bacterial decontamination (8 log reduction rate). Moreover, it was demonstrated that naturally occurring nuclease activities were not changed by the pulsed electric field treatment. In contrast to a thermal treatment with temperature over 72°C, for 4 min., the nuclease activity was reduced up to 90%. In this case, inactivation is only 4 log. The same inactivation rate can be obtained by a combination of heat treatment (60°C) and pulsed electric field treatment (30 J/ml).
Keywords
EN
Publisher

Year
Volume
115
Issue
6
Pages
1092-1094
Physical description
Dates
published
2009-06
Contributors
author
  • Institute for Pulsed Power and Microwave Technology, Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
author
  • Institute for Pulsed Power and Microwave Technology, Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
author
  • Institute for Technical Chemistry Water Technology and Geotechnology Division, Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
author
  • Institute for Technical Chemistry Water Technology and Geotechnology Division, Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
References
  • 1. A.J. Castro, G.V. Barbosa-Canovas, B.G. Swanson, J. Food Process. Pres. 17, 47 (1993)
  • 2. T. Schwartz, W. Kohnen, B. Jansen, U. Obst, FEMS Microbiol. Ecol. 43, 325 (2003)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv115n647kz
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