These authors have equal contribution.
Identification of dichloroacetic acid degrading Cupriavidus bacteria in a drinking water distribution network model
Article first published online: 17 OCT 2013
© 2013 The Society for Applied Microbiology
Journal of Applied Microbiology
Volume 116, Issue 1, pages 208–221, January 2014
How to Cite
Berthiaume, C., Gilbert, Y., Fournier-Larente, J., Pluchon, C., Filion, G., Jubinville, E., Sérodes, J.-B., Rodriguez, M., Duchaine, C. and Charette, S.J. (2014), Identification of dichloroacetic acid degrading Cupriavidus bacteria in a drinking water distribution network model. Journal of Applied Microbiology, 116: 208–221. doi: 10.1111/jam.12353
- Issue published online: 16 DEC 2013
- Article first published online: 17 OCT 2013
- Accepted manuscript online: 30 SEP 2013 09:12AM EST
- Manuscript Accepted: 19 SEP 2013
- Manuscript Revised: 5 SEP 2013
- Manuscript Received: 18 JUN 2013
- Chair of Drinking Water Research at Laval University (CREPUL)
- Natural Sciences and Engineering Research Council
- Fond de la Recherche en Santé du Québec
- bacterial community;
- drinking water;
- haloacetic acid;
- water distribution network
Bacterial community structure and composition of a drinking water network were assessed to better understand this ecosystem in relation to haloacetic acid (HAA) degradation and to identify new bacterial species having HAA degradation capacities.
Methods and Results
Biofilm samples were collected from a model system, simulating the end of the drinking water distribution network and supplied with different concentrations of dichloroacetic and trichloroacetic acids at different periods over the course of a year. The samples were analysed by culturing, denaturing gradient gel electrophoresis (DGGE) and sequencing. Pipe diameter and HAA ratios did not impact the bacterial community profiles, but the season had a clear influence. Based on DGGE profiles, it appeared that a particular biomass has developed during the summer compared with the other seasons. Among the bacteria isolated in this study, those from genus Cupriavidus were able to degrade dichloroacetic acid. Moreover, these bacteria degrade dichloroacetic acid at 18°C but not at 10°C.
The microbial diversity evolved throughout the experiment, but the bacterial community was distinct during the summer. Results obtained on the capacity of Cupriavidus to degrade DCAA only at 18°C but not at 10°C indicate that water temperature is a major element affecting DCAA degradation and confirming observations made regarding season influence on HAA degradation in the drinking water distribution network.
Significance and Impact of the Study
This is the first demonstration of the HAA biodegradation capacity of the genus Cupriavidus.