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Publication type
Wissenschaftlicher Artikel
Date
2018
'http://rightsstatements.org/vocab/InC/1.0/'

A new approach to testing the efficacy of drinking water disinfectants

Editor
Containing Item
International Journal of Hygiene and Environmental Health
221 (2018), Heft 8, Pages 1124-1132
Keywords
Kolibakterien
Citation
Frohnert, Anne, Andreas Grunert, Hans-Christoph Selinka and Regine Szewzyk, 2018. A new approach to testing the efficacy of drinking water disinfectants. International Journal of Hygiene and Environmental Health [online]. 2018. vol. 221 (2018), Heft 8, Pages 1124-1132. DOI 10.60810/openumwelt-321. Verfügbar unter: https://openumwelt.de/handle/123456789/5978
Abstract english
New disinfection procedures are being developed and proposed for use in drinking-water production. Authorising their use requires an effective test strategy that can simulate conditions in practice. For this purpose, we developed a test rig working in a flow-through mode similar to the disinfection procedures in waterworks, but under tightly defined conditions, including very short contact times. To quantify the influence of DOC, temperature and pH on the efficacy of two standard disinfectants, chlorine and chlorine dioxide, simulated use tests were systematically performed. This test rig enabled quantitative comparison of the reduction of four test organisms, two viruses and two bacteria, in response to disinfection. Chlorine was substantially more effective against Enterococcus faecium than chlorine dioxide whereas the latter was more effective against the bacteriophage MS2, especially at pH values of >7.5 at which chlorine efficacies already decline. Contrary to expectation, bacteria were not generally reduced more quickly than viruses. Overall, the results confirm a high efficacy of chlorine and chlorine dioxide, validating them as standard disinfectants for assessing the efficacy of new disinfectants. Furthermore, these data demonstrate that the test rig is an appropriate tool for testing new disinfectants as well as disinfection procedures.