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Laboratory of Environmental Biotechnology

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Fate of pathogenic bacteria during waste treatment

We study the fate of pathogenic bacteria during the treatment and recycling of organic waste by following four lines of research:

-        Impact of waste treatment (anaerobic digestion, composting, wastewater treatment by microalgae),

-        Role of indigenous microorganisms on inactivation of pathogenic bacteria (biotic factors),

-        ‘Regrowth’ after treatment and potential link with bacteria being in a Viable But Non Culturable state,

-        Dispersal during wastewater reuse for irrigation or spreading of digestates on soil.



  • Wery, N., Lhoutellier, C., Ducray, F., Delgenes, J.-P., and Godon, J.-J. (2008) Behaviour of pathogenic and indicator bacteria during urban wastewater treatment and sludge composting, as revealed by quantitative PCR. Water Research, 42(1-2):53-62.
  • Jeanneau L., Solecki O., Wery N., Jarde E., Gourmelon M., Communal P. -Y.,  Jadas-Hecart A., Caprais M. -P., Gruau, G., Pourcher, A.-M. (2012) Relative decay of fecal indicator bacteria and human-associated markers: a microcosm study simulating wastewater input into seawater and freshwater. Environmental Science & Technology, 46: 2375-2382.
  • Kacem, M., Bru-Adan, V., Goetz, V., Steyer, J. P., Plantard, G., Sacco, D., & Wery, N. (2016). Inactivation of Escherichia coli by TiO 2-mediated photocatalysis evaluated by a culture method and viability-qPCR. Journal of Photochemistry and Photobiology A: Chemistry, 317, 81-87.
  • Maynaud, G., Pourcher, A. M., Ziebal, C., Cuny, A., Druilhe, C., Steyer, J. P., & Wéry, N. (2016). Persistence and potential Viable but Non-culturable state of pathogenic bacteria during storage of digestates from agricultural biogas plants. Frontiers in Microbiology, 7.


Nathalie Wery