Assessment of microbial growth potential of PVC flexible tubing in contact with drinking water
The microbial growth on plasticized polyvinylchloride (PVCp) tubes approved for food contact and used for water supply of coffee vending machines was determined. Four PVCp flexible tubes used for water transfer were tested for their Biomass Production Potential (BPP) using the original tube immersion test and a new ‘tube filling‘ test. Comparison of the microbial growth potential of one PVCp trademark in laboratory tests and during real usage was done.
In all tests the microbial growth support properties depended on the trademark of the tested PVCp products. The difference between the biomass production potentials of the PVCp products using the immersion BPP test at surface-to-volume contact ratios of 0.17 cm-1 and 1.7 cm-1 was statistically significant for all trademarks. The ‘tube filling’ test has potential to be used for assessment of growth promoting properties of flexible tubing materials.
TSVETANOVA Zvezdimira;
HOEKSTRA Eddo;
2012-08-03
INTERNATIONAL WATER ASSOCIATION PUBLISHING
JRC66076
1606-9749,
http://www.iwaponline.com/ws/01204/ws012040489.htm,
https://publications.jrc.ec.europa.eu/repository/handle/JRC66076,
10.2166/ws.2012.022,
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